Public Release: 19-Jan-2019
Scientists turn carbon emissions into usable energy
Ulsan National Institute of Science and Technology(UNIST)
IMAGE: This is a schematic illustration of Hybrid Na-CO2 System and its reaction mechanism. view more
Credit: UNIST
A recent study, affiliated with UNIST has developed a system that produces electricity and hydrogen (H2) while eliminating carbon dioxide (CO2), which is the main contributor of global warming.
Published This breakthrough has been led by Professor Guntae Kim in the School of Energy and Chemical Engineering at UNIST in collaboration with Professor Jaephil Cho in the Department of Energy Engineering and Professor Meilin Liu in the School of Materials Science and Engineering at Georgia Institute of Technology.
In this work, the research team presented Hybrid Na-CO2 system that can continuously produce electrical energy and hydrogen through efficient CO2 conversion with stable operation for over 1,000 hr from spontaneous CO2 dissolution in aqueous solution.
“Carbon capture, utilization, and sequestration (CCUS) technologies have recently received a great deal of attention for providing a pathway in dealing with global climate change,” says Professor Kim. “The key to that technology is the easy conversion of chemically stable CO2 molecules to other materials.” He adds, “Our new system has solved this problem with CO2 dissolution mechanism.”
Much of human CO2 emissions are absorbed by the ocean and turned into acidity. The researchers focused on this phenomenon and came up with the idea of melting CO2 into water to induce an electrochemical reaction. If acidity increases, the number of protons increases, which in turn increases the power to attract electrons. If a battery system is created based on this phenomenon, electricity can be produced by removing CO2.
Their Hybrid Na-CO2 System, just like a fuel cell, consists of a cathode (sodium metal), separator (NASICON), and anode (catalyst). Unlike other batteries, catalysts are contained in water and are connected by a lead wire to a cathode. When CO2 is injected into the water, the entire reaction gets started, eliminating CO2 and creating electricity and H2. At this time, the conversion efficiency of CO2 is high at 50%.
“This hybrid Na-CO2 cell, which adopts efficient CCUS technologies, not only utilizes CO2 as the resource for generating electrical energy but also produces the clean energy source, hydrogen,” says Jeongwon Kim in the Combined M.S/Ph.D. in Energy Engineering at UNIST, the co-first author for the research.
In particular, this system has shown stability to the point of operating for more than 1,000 hours without damage to electrodes. The system can be applied to remove CO2 by inducing voluntary chemical reactions.
“This research will lead to more derived research and will be able to produce H2 and electricity more effectively when electrolytes, separator, system design, and electrocatalysts are improved,” said Professor Kim.###
Journal Reference
Changmin Kim et. al., “Efficient CO2 Utilization via a Hybrid Na-CO2 System Based on CO2 Dissolution,” iScience, (2018).
From EurekAlert!
HT/David B
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For the life of me I cannot understand why anyone would want to reduce CO2 the basic building block of life on this planet. We need more not less. I’m with fossil, burn baby burn.😊
So if I’m following their diagram, they want to take the CO2 – a weak greenhouse gas and use it to eventually fill our cars with H2 so we end up with H2O – a strong greenhouse gas. I’m envisioning the LA basin sitting in a perpetual fog and the greenies screaming how H2O is destroying the planet.
Does this make sense?
No more sense than the energy required to MAKE and replace the pure sodium anode.
Some geologist just needs to discover that sodium metal mine, and sodium metal is soft so it should be easy to mine.
Sodium metal is highly reactive you are not going to find a “mine” of sodium metal anywhere, any more than you find a mine of pure aluminium. Mines produce oxides which then need reducing to a metal.
Leo is right. As always, the first and obvious question is : how much energy is required to provide the ingredients for this reaction.
CO2 is already oxidized, you are NEVER going to conceive a means of getting something burnable again without inputting more energy than you will ever recover from re-burning it. How much energy is needed to remove this CO2 and how much Na are you going to need to produce a measurable impact on proportion of CO2 in the entire atmosphere? It’s stupid to even try.
This is not inept. Anyone with these qualifications knows it is a joke. It is nothing more than cynical grant seeking for public funds using the magic mantra of “carbon”
BTW what are we supposed to do the gigatonnes of NaHCO3 which is produced? Maybe we can waste even more energy and recover the sodium back out and produce water and CO2 !!
So Lasseter had a cunning plan all along to disguise the mother lode sodium metal mine he knew would be worth squillions in future when we were all doomed-
https://en.wikipedia.org/wiki/Lasseter%27s_Reef
Thar’s sodium in them thar hills!
Greg, I think you missed the implied /sarc
Energy is the primary problem with this proposal. CO2 is a low energy molecule – the residue along with water from the release of chemical energy in carbohydrates. Hydrogen gas is a high energy molecule – just try putting a flame to some and see what happens (or review footage of the Hindenburg’s last docking). They claim they can generate both high energy molecules (hydrogen) and extra electricity from their reaction but don’t disclose where the energy comes from to make that happen. They seem to be pretending they have a chemical perpetual motion machine. Good luck.
Greg,
Bake a sh*tload of bread and pancakes??
Whenever a new CO2 capture scheme is publicized, the first thing I do is look at the energy balance. This one uses sodium metal, not a nice material to handle, esp. around water. There is no way that the process will not need more energy than it generates, unless they do indeed find a sodium metal deposit, which can only exist in the absence of water. I guess you could use a process like this on a submarine to scrub out the CO2, but there are better ways.
Sodium metal does not exist naturally. Anyone with a basic knowledge of chemistry would know that.
I presume you are just being sarcastic, right?
Yes, Russ. It was a joke, which is what this proposed CO2 capture is, a joke.
Thanks Carl. Happy to know so many people see right thru this BS. If we could somehow get thru to the scientifically illiterate media. Wouldn’t that be nice?
BS, what they are doing is converting usable energy into usable energy, probably with an efficiency < 50% . EUREKA! that will solve world's energy needs , won't it.
Define efficient
I was joking about the Na mine Greg.
Pretty obvious that much of the sodium on the surface has combined with chlorine and is either in the oceans or in halite deposits.
There are some other sodium containing minerals, like feldspar and sodalite.
Sodium is rare in the solar system (0.0033 % by weight, 2 ppm by atom fraction), but concentrated on the surface of the earth to 2.8%.
As I stood from afar and I noticed the Na mother lode flying far over their heads.
Right on target, Leo. It’ll take more energy to produce the sodium metal than they’ll get out of it.
Making sodium metal will produce more CO2 than they’ll remove using their battery.
The “spontaneous CO2 dissolution” step apparently means the battery runs off CO2 at its equilibrium solution concentration driven by the 400 ppm partial pressure in air. The current density produced by that process is close to zilch. They’ll never run anything off it.
The water in the cathode side, where H2 is released, will become more alkaline as the CO2 reaction proceeds. It will have to be replaced regularly, or the reaction grinds to a halt.
And this, “melting CO2 into water” is a fine display of ignorance.
The reaction is pretty much sodium metal plus water makes hydrogen plus sodium hydroxide. Add CO2, and you get some sodium carbonate. That’s it.
Those people at GA Tech, Guntae Kim, Jaephil Cho , and Meilin Liu, ought to be hiding their heads in shame over touting such nonsense.
+ Many Pat.
Spot on.
Perzactly Frank. Sodium metal is so reactive it will burst into flames if exposed to air. Throw a bit into water an it can explode. A first year chemistry demo.
Later on you learn about entropy, enthalpy, activation energy and all the nuts and bolts of chemistry that make this publication look exactly as stupid as it really is.
TANSTAAFL
The only problem with getting large amounts of sodium is that it is predicated on the continuing industrial use of large amounts of chlorine. Both Sodium and Chlorine are produced by separating them from salt.
Much of the energy used to produce the sodium electrode is retrieved from the Sodium-CO2 battery that produces hydrogen as a by product. The crushing mass of stupid is using the generated hydrogen gas to provide hydrogen filling stations.
It would be a much more useful scheme for electric vehicles if the Sodium-CO2 cell was used to produce hydrogen from water stored on the vehicle. Basically, you could just store hydrogen on the EV in the form of water and introduce sodium to the water to evolve the hydrogen needed for the fuel cell, but the Sodium-CO2 cell reacts the sodium with the water at a rate controllable by varying the current from the Sodium-CO2 cell.
Now I am thinking of a straightforward way to get this technology on the road faster. Highway tractors with three fuel cells working in series: A decane-oxygen fuel cell converts diesel oil and oxygen to electricity, CO2, and water. The CO2 and water go to a Sodium-CO2 cell to produce electricity and Hydrogen. Finally, the hydrogen goes to a hydrogen fuel cell to produce electricity and water.
If the dissolved NaHCO3 can be collected and returned to the HCl solution left behind where the sodium was liberated from the salt, the problem of what to do with the chlorine is solved.
If an economical way to produce H2 from H2O is developed, trying to use that H2 to fuel vehicles would be a waste. Far more efficient to burn that H2 to produce electricity for charging EV’s.
At least, that is what they would be saying if they really thought CO2 was a problem and were trying to present a viable solution.
SR
There diagram leaves much missing. What exactly are the reactions occurring.
The organic equation seems to omit where the Carbon gets removed.
I see plenty of C and O going in, and I assume the H must be replenished as I don’t see it being added.
Does the Na Cathode and separator get consumed?
Maybe the ‘organic electrolyte’ is a long chain hydrocarbon molecule that is consumed in the reaction, ‘sacrificed’ to preserve the anode from galvanic corrosion. Perhaps something like Jet A or diesel or, dare I say, gasoline? Energy must come from some where. It is just the cynic in me.
The galvanic dissolution from the sodium anode is the source of the energy for the battery setup shown.
Sodium is the anode, meaning it dissolves.
This is shown by the Na+ leaving the plate and combining with the bicarbonate, which is where the carbon goes.
In solution, the NA and bicarbonate stay dissolved as separate ions, unless I suppose the solution becomes saturated with them. But that would tend to inhibit the reaction which produces it.
Note the sodium anode is sitting in an organic electrolyte solvent. Most organics are nonpolar, meaning they do not readily ionize in solution.
If the sodium was in the water, it would instantly explode.
It takes a lot of energy to produce sodium metal, which must be kept from water.
My guess is this setup would be expensive to make and not given to scalability.
Not bicarbonate…my mistake. Carbonate ions and sodium ions…soda ash.
Dissolving soda ash in water is exothermic, so to precipitate it out would take addition of energy…endothermic.
It hardly matters…the cost of sodium metal is very high.
Note they said it was an efficient reaction, but nothing about the cost effectiveness of the method.
Sodium has a single electron in it’s valence shell, and so wants to shed that electron, which is the actual source of the energy here.
They say CO2 is the source, but that ignores the input cost of the sodium metal and the cost in energy to produce it.
Sodium is produced by running an electric current through salt water and plating the sodium out of solution onto the negative electrode. Chlorine bubbles out at the positive electrode. The voltage is set to separate the salt, not the water. The impressed voltage keeps the plated out sodium from reacting with the water. Energy is recovered by dissolving the sodium electrode and recombining the evolved hydrogen with oxygen in a hydrogen fuel cell.
Scalability is not that great an issue as the best way to deliver the evolved hydrogen to a hydrogen fuel cell powered electric vehicle is to have the sodium air cell on the same vehicle as the hydrogen fuel cell. The only issue is that the sodium air cell needs to bubble a lot of air through the cell. At 400ppm, there is enough CO2 in 20 cubic meters of air to produce an amp-hour of current, so it is better to drive the cell with a more concentrated source of CO2 than the air.
As the aqueous electrolyte holds on to the CO2, the scheme makes more sense as a way to make use of sequestered carbon than as a way to sequester carbon
The CO2 becomes sodium carbonate, Na2CO3, RS. CO2 doesn’t get reduced in that system. There is no organic reaction.
The Na metal gets consumed. The separator is electrochemically inert, but transfers Na(+) ions over to the water side of the reactor. The Na(+) migration maintains electroneutrality as H(+) gets converted to H2.
The system can never be recharged, like a common battery. The Na metal cathode will have to be physically replaced, along with the saturated sodium carbonate solution on the water side of the separator.
The whole story is pure unadulterated garbage.
100%
It is not pure unadulterated garbage.
Sodium forms ionic bonds, not covalent bonds, so the separation of sodium from what it is bonded to is not that expensive and sodium metal is a byproduct of producing chlorine for industrial applications. The battery cannot be recharged, but it can be recycled.
It may not be useful for the purpose of sequestering atmospheric CO2, but if the cell is supplied with CO2 at a higher density than ambient air, the CO2 ends up sequestered. Storing and distributing the released hydrogen is still a non-starter, but if the hydrogen fuel cell is at the same location as the sodium cell, you can match the output of the sodium cell to the demands of the hydrogen fuel cell and eliminate storage and distribution issues.
It is a pile of manure, but there is a pony not too far away.
Is Bill Gates funding this?
https://www.cnbc.com/2018/06/07/carbon-engineering-and-harvard-find-way-to-convert-co2-to-gasoline.html
No, different targets. This one uses concentrated CO2 eg exhaust, Gates’ one is direct capture from air in low concentration.
Another nonsense idea.
Plants already do it very efficiently using freely available renewable solar energy . They donate it free of charge in form of multitude of crops, grazing grass, building industry timber, firewood etc, etc.
Who else think that could do better needs his/her head looked up in MR scanner.
If I understand correctly they turn CO2 into NaCO3 (sodium bicarbonate = soda ash).
Actually sodium bicarbonate has several industrial uses… most of which involve RELEASING CO2 back into the air!
Of course we could restart the mummification industry (natron salts were used to desiccate mummies in ancient Egypt)
Note that one atom of sodium metal is consumed for every molecule of CO2 removed.
I would like to see how much that electricity winds up costing after accounting the price of this setup?
To remove tons of CO2 from the air, a lot of sodium will be required.
The ratio is 2 to 1.
1000 pounds of sodium consumed to remove 2000 pounds of CO2, given that atomic weight of sodium is 22 grams per mole, and molecular weight of CO2 is ~44 grams per mole.
Sodium is listed as somewhere around $2500-3000 per ton.
But that lower price appears to be for 97% pure metal. Not sure if that is pure enough for a setup like this.
If it requires very pure metal, it might be insanely expensive.
As it is, it would appear that this setup costs thousands of dollars to remove a ton of CO2 from the air.
If I’m understanding the chemistry, the anode doesn’t need sodium of any great purity. But the process is still a net loser energetically.
Oh wait…I was wrong. It is not sodium bicarbonate produced, it is, as you point out, soda ash, which is Na2CO3.
So double that cost for the sodium required.
Two atoms of sodium for each one of CO2 removed.
Soda ash can be made very cheaply from brine and limestone.
This would appear to be the most expensive way to make soda ash every invented, although I am not sure of that.
I think it would be cheaper to buy land and plant trees to remove CO2 from the air, plus then you own land and lumber.
First, capturing, transporting, and introducing CO2 from power plant emissions takes infrastructure as well as energy.
Second, the CO2 is NOT converted or even energetically altered in this process. It simply forms carbonic acid, which ionizes to bicarbonate and neutralizes the Na+ ions migrating into the solution.
Third, the elephant in the system is the sodium metal anode. It takes the electrolysis of molten NaCl to make sodium metal, which reacts quite violently in contact with water. So, all of the energy used to make the sodium metal is lost as the metal goes back to sodium ions while reducing H+ in the water to hydrogen gas.
Fourth, the hydrogen has to be collected, compressed, transported, and distributed.
It would be much more efficient to simply use the power plant’s electricity to electrolyze water, if what you want is hydrogen gas. The above process has too many steps and has energy losses every step of the way. Another waste of research time and money.
To remove 400 tons they would also have to ‘process’ 1,000,000 tons of air!
The diagram shows CO2 as an input and H2 and electricity (for the incandescent lightbulb) as outputs. It takes energy to do that. They don’t show an explicit energy input. That leads to the conclusion that the electrodes (or electrolyte) are consumed.
This project is just an expensive way to remove CO2 from the atmosphere. My guess is that the production of the consumable electrodes will result in more CO2 in the atmosphere.
The Sodium metal anode is consumed. It hardly needs to be mentioned that manufacturing the anode takes more energy than can be gained by oxidizing the hydrogen.
This is just another boondoggle intended for ignorant politicians.
tty, you nailed it. Basically they are just manufacturing and then burning sodium metal, with a net loss of energy in the process.
The article should be retitled – Scientists Turn Carbon Paranoia Into Usable Grant Money.
A.W. ~ ^ That’s right ^
tty
“…This is just another boondoggle intended for ignorant politicians…”
Could we get them to repeal and replace the Laws of Thermodynamics?? I’m sure AOC would run with the idea.. imagine what we could do with perpetual motion machines and negative entropy!!
just musing
Cheers
Mike
Exactly. It is a perpetual motion machine.
It generates energy by consuming a sodium anode. The energy it produces could be use to make a sodium cathode out of salt and so on..
I cannot believe this load of wombat excrement ever got published
And not even on EurekAlert!
The South Koreans are giving EurekAlert! a run for their money this week.
oops, I stand corrected. It was EurekAlert! after all.
I guess we should have expected that, like the Patriots being in the Super Bowl.
Great comment commiebob!
Along with solid followup comments by tty and ScarletMacaw.
A) It is called a perpetual motion machine; i.e. impossible.
B) N.B. the reference to magical catalysts and electrolytes; all without damage to the electrodes… Imagine that, automatically recycled sodium atoms…
C) N.B. And of course the reference to future research that improves the design, electrolytes, separator and catalysts…
Which is a blunt statement that this does not actually work and “Please send lots of money”!
.
One wonders just how they reached their claim for a 1,000 hours stability mark? Sure sounds like a fantasy model in operation.
Not to overlook that 1,000 hours is forty one and 0.6666 days; or commonly known as one month, one and a half weeks.
They call it a battery, which automatically means that the anode is consumed and is the source of the energy the battery provides.
The setup and writeup by these guys are a joke.
As you point out.
If UNIST can pull this one off, perhaps then they can find me a round trip bike rout that is downhill all the way. That would be cool
(Repeatedly bangs head on desk at the stupidity of all this)
You can’t get energy from nothing. If you take energy out of a system SOMETHING had to put it there in the first place. Carbon Dioxide is the waste product of burning Carbon in an Oxygen environment, so it has no more energy to give, at least chemically. It TAKES energy to break down CO2 and it TAKES energy to break down the Water. This energy is coming from somewhere, and it could be just as easily used differently.
When a plant takes in CO2 and water, and releases Oxygen, it uses the energy in sunlight to do it. It can’t do it without the sun, because these molecules don’t have any more potential energy to give. This process is exactly the same.
In an interview at our company with a MIT PhD grad, he said at his last job that he was working on a highly reversible reaction (funded by the DOE) to store energy from CSP. It utilized CaO+CO2 and gave off energy when absorbing CO2. Couple of things that caught my eye in the presentation: 1) it required like 20000 miles of piping for one CSP plant and 2) the reaction occurred at 750°C.
My question after the presentation to him was (ignoring the very high temperature requirement for the reaction), “If you are absorbing CO2 and giving off energy in the process, why isn’t this being developed for CCS?” The dumb look he gave me was priceless.
Is this just a way of burning sodium?
Yes
See Jenne’s comment below, which shows that hydrogen is produced directly. One can generate heat by making Na2O from combustion but the solid product would be difficult to handle, i.e. very inconvenient. The fallacy as many have pointed out is that making Na in the first place is energy intensive.
Since griff seems to be offline, let me help out…
There’s so much nuisance sodium metal just laying around to be picked up. And if we run out of that, there’s an inexhaustible supply in the ocean. Zillions of gigatons of NaCl. In thirty years we will have cheap, abundant fusion power and we can extract the Na at the same time we’re extracting the deuterium.
Now addressing the coproduct sodium bicarbonate, which some people inexplicably think is useless. We need that to make many baked goods. So we should be able to make trillions of dollars on that, since there are no readily available sources of baking soda or we’re running out or something. (Note to self- make something up here that will be more believable, then delete this comment). My model indicates actually a potential of 1.26239876 e 7 USD/hr. I ran it twice, so it must be right.
The hydrogen is easy to use as a transportation fuel, no difficulty with embrittled metals (oil industry lies). And if we make the sodium metal from salt, then chlorine gas will come in handy for gassing climate deniers.
“sodium bicarbonate, which some people inexplicably think is useless”
Not those with heartburn.
solid sodium is converted in the process:
net: 2Na + 2H+ → 2Na+ + H2(g) Eo = 2.71 V
https://www.sciencedirect.com/science/article/pii/S258900421830186X
Hydrogen and electric generation powered by Na-CO2-H2O battery. How come we don’t use batteries to power our industries, homes or even to store electric power in the grid? $$$$$$
Energy cannot be created or destroyed. What happens to HCO₃ molecule ?
An aqueous solution of sodium bicarbonate is continuously formed and the problem you elude to is that this has to be removed as it will build up. BTW HCO3- is the negatively charged bicarbonate ion, not a molecule which by standard definition are neutral. Sodium ion is +1 charged.
It is not bicarbonate produced, but carbonate…soda ash.
Which will accumulate and block the reaction very quickly unless the water is replaced.
Then it takes energy to dehydrate the soda ash.
More coffee needed.
It is bicarbonate.
My bad.
Without a process energy balance the diagram is meaningless in terms of usefulness.
I suspect this is a form of partial photosynthesis which, however, requires an energy input.
Interesting none the less. Presumably the Anode is consumed; otherwise I am in no position to comment.
So where is all the sodium metal coming from, and what do you do with the sodium hydro carbonate left over?
If you want to turn CO2 into fuel, just run cars on alcohol, VW and Fiat have been doing this for decades in Brazil.
Or have a wood stove or coal fire and that’s been going for centuries. I am told you can even use wood chips, coal and gas to generate electricity actually recycling CO2 but more efficiently. Though the concept may be a little abstruse for UNIST
Now, if only we could find an energy free way to “mine” the sodium metal consumed in the reaction, we could have that perpetual motion machine! / sarc.
Sodium metal is soft, so it can easily be scooped out of the mine.
Asteroid smelting.
Yeah, there must be a sodium asteroid somewhere in the universe.
Sodium is two parts per million in the solar system.
Orders of magnitude more concentrated on the surface of Earth.
Soooooooooooooooooooooooooooooooo, this will lead to government mandated C02 production for more”green/alternative/sustainable” energy?
Oh dear, the Green lot won’t like this. I don’t know what the energy balance or value of this potential technology is, but it seems to tick all the green alarmist boxes, which means they will have to deny, it is of any value. They will perhaps claim it will produce more pollution than any potential benefit.
The Greens can not have a system that provides energy and removes CO2. That will destroy their prime villain at a stroke. What will they turn to then Their urgency to de-industrialise the planet and destroy capitalism and spread socialism requires a pan world issue, that demonises energy?
Don’t worry Rod. It will only consume energy uselessly. The Greens will love it.
Much of human CO2 emissions are absorbed by the ocean and turned into acidity.
That was the give away … acidity ???
Where does the excess carbon go? The diagram shows it entering but not exiting the aqueous solution.
Yep, I’ve noticed that too. It must be ferried out by fairies into the outer space
Exactly. This absurdity of a process description should never have been published without showing all the inputs and outputs.
Damn both chemistry and thermodynamics! (And Trump, too).
I blame George Bush
Didn’t we always used to do that?
It’s listed on the lower left in the water side.
It reacts with the cathode electrode and precipitates out as sodium bicarbonate.
All they’ve demonstrated is a very expensive way to make sodium bicarbonate and a little electricity.
“It’s a bad idea whose time has come.”
Aside from “burning” the sodium anode, producing hydrogen gas requires more energy to compress and store the gas, which is dangerous to store and use. Another silly green device?
If the process combined the Hydrogen with the Carbon to create a stable molecule (say methane, or even better isooctane) then I would be more useful.
It still would burn Sodium, though. And would therefore require more energy then it produced.
~¿~
Hydrogen is the Houdini molecule… it can escape from anything.
Let’s say the process is viable, then it would be logical to pump the excess hydrogen into a fuel cell on premise and produce electricity.
Another garbage post derived from EurekAlert!
I wish ctm would put the notice of the EurekAlert! source at the top of the article instead of the bottom. That way we all could see that the post is not worth reading.
jenne (above) has it exactly right. Sodium metal is the source of the power.
As every even slightly bratty chemistry student knows, when you throw sodium metal in water, you get sodium hydroxide (NaOH) and hydrogen gas. (BOOM!)
Then you add The Evil Gas (CO2) to make Sodium biEvilate (NaHCO3) to eliminate the hydroxide and secure grant funding.
All they have done is to run the reaction in an electrochemical cell to separate the half reactions.
Seems like a lot of trouble to make baking soda, although you do get some electricity out of it.
TonlyL
Then use the baking soda to bake bread and release the CO2 back to Atmosphere and the Research Grants continue !
“That way we all could see that the post is not worth reading”
As soon as I saw “Carbon dioxide (CO2), which is the main contributor of global warming” in the first sentence I knew the rest was going to be bunk…
Rube Goldberg is alive and well!
If somebody else pays there seems to be no limit to what you can dream up.
What a complete and utter waste of time. You’d have to waste energy concentrating CO2 from the atmosphere, waste more energy making the sodium, which is always going to be a significant hazard in any commercial system, and then waste more energy in the final inefficient reaction. And then there’s the cost of manufacturing the machinery.
Oh.. and you also have to build the hydrogen economy in the mean time.
Stoopid, stoopid, stoopid. Not even an undergraduate fail.
Well they might have been thinking about bubbling all the car tailpipes and smokestacks through the solution so they don’t waste energy concentrating CO2 from the atmo so you my be a little harsh on them here but maybe you missed that bit in the sciencey diagram?
Think globally and then drill down locally afterwards with efficient collection methods-
https://www.bing.com/images/search?q=gas+mask+images&qpvt=gas+mask+images&FORM=IGRE
But look at the positive side. The process would produce mountains of sodium bicarbonate (Alka Seltzer) that will be needed when contemplating our electricity bills each month.
Neat… how many TENS OF BILLIONS OF THESE are we gonna need to compensate for 7 billion people breathing?
I mean the output is technically water vapor, a real voluthermal atmospheric buffer, but it’s neat.
How many hundreds of pounds does this have to be in order to charge my phone?
Every schoolchild will be able to tell you that there is a cheaper way of trapping CO2 as a bicarbonate and that is via the Solvay process. It was observed , about 200 years ago that CO2 and NH3 in brine will produce sodium bicarbonate solid (fired to give sodium carbonate for soap, pottery etc with loss of 1/2 CO2). The ammonia can be recycled , so that apart from the initial energy expenditure in creating it from N2 and H2 by the Haber process it should run with fairly low energy input. I don’t know however what you do with the bicarbonate and of course there is no H2 produced .
All carbon capture systems need surely to factor in the carbon footprint of the materials used (eg amines) in the capture process and the energy for that is usually from fossil fuel power stations – so you are generating CO2 in order to capture it .
The advocates of sequestration seem to gloss over that as the commenters here have spotted in the case posted above.
When you were a schoolchild, you apparently went to a better school than I did, Mike.
I do not think the leftist indoctrination of kids in the 21st century includes education on industrial chemical processes.
Just a guess.
Other than that…
Yes, the Solvay process uses brine and limestone to make soda ash very cheaply.
I do not think it pulls CO2 out of the air.
If it did, it would be too slow.
All we have to do first is mine sodium metal for the anode…….
Surely you use the electricity that’s generated to split out sodium from sea water.
Credit: UNIST
A recent study, affiliated with UNIST has developed a system that produces electricity and hydrogen (H2) while eliminating
carbon dioxide (CO2), which is the main contributor of global warming. <– Never Proven Assertion: BLUNT LIE
Published This breakthrough has been led by Professor Guntae Kim in the School of Energy and Chemical Engineering at UNIST in collaboration with Professor Jaephil Cho in the Department of Energy Engineering and Professor Meilin Liu in the School of Materials Science and Engineering at Georgia Institute of Technology.
In this work, the research team presented Hybrid Na-CO2 system that can continuously produce electrical energy and hydrogen through efficient CO2 conversion with stable operation for over 1,000 hr from spontaneous CO2 dissolution in aqueous solution.
“Carbon capture, utilization, and sequestration (CCUS) technologies have recently received a great deal of attention for providing a pathway in dealing with global climate change,” says Professor Kim. <– Never Proven Assertion: BLUNT LIE
“The key to that technology is the easy conversion of chemically stable CO2 molecules to other materials.” He adds, “Our new system has solved this problem with CO2 dissolution mechanism.”
Much of human CO2 emissions are absorbed by the ocean and turned into acidity. <– Never Proven Assertion: BLUNT LIE
The researchers focused on this phenomenon and came up with the idea of melting CO2 into water to induce an electrochemical reaction. If acidity increases, the number of protons increases, which in turn increases the power to attract electrons. If a battery system is created based on this phenomenon, electricity can be produced by removing CO2. <– Never Proven Assertion: BLUNT LIE
Their Hybrid Na-CO2 System, just like a fuel cell, consists of a cathode (sodium metal), separator (NASICON), and anode (catalyst). Unlike other batteries, catalysts are contained in water and are connected by a lead wire to a cathode. When CO2 is injected into the water, the entire reaction gets started, eliminating CO2 and creating electricity and H2. At this time, the conversion efficiency of CO2 is high at 50%.
“This hybrid Na-CO2 cell, which adopts efficient CCUS technologies, not only utilizes CO2 as the resource for generating electrical energy but also produces the clean energy source, hydrogen,” says Jeongwon Kim in the Combined M.S/Ph.D. in Energy Engineering at UNIST, the co-first author for the research.
In particular, this system has shown stability to the point of operating for more than 1,000 hours without damage to electrodes. The system can be applied to remove CO2 by inducing voluntary chemical reactions.
“This research will lead to more derived research and will be able to produce H2 and electricity more effectively when electrolytes, separator, system design, and electrocatalysts are improved,” said Professor Kim.###
– Never Proven Assertions: BLUNT LIES –
This is a sad state of affairs and damning statement on the quality of academic researchers today in this field. 100% bullshit funded by South Korean public dollars.
Nice process. But there is a little problem, just a little. To produce metalic sodium you need much more energy to expend than you can gain by burning coal. This process is an energy sink.
And if your goal is sequestering CO2 then there are some more practical metods, but please, do not sequester CO2. CO2 is the most valuable part of the atmosphere. CO2 is life, it is potential oxigen.
This articel is referenced by Eurekalert! So please, red alert. This process is nonsence. Nobody is able gain energy from CO2.
Try to explain this doesn’t work to occasional cortex