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Hydrogen-Emitting Microbe Examined
Concerned Onlooker wrote to mention an article at Science Daily discussing a microbe that lives in volcanic environments, which emits Hydrogen gas as a waste product. "As the world increasingly considers hydrogen as a potential biofuel, technology could benefit from having the genomes of such microbes. 'C. hydrogenoformans is one of the fastest-growing microbes that can convert water and carbon monoxide to hydrogen," remarks TIGR evolutionary biologist Jonathan Eisen, senior author of the PLoS Genetics study. "So if you're interested in making clean fuels, this microbe makes an excellent starting point.'"
Where does the carbon monoxide come from?
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Now we can invent cars that run purely on the farts of microbes.
This is a nice job for a microbe, but I don't have see any information about the working temperature that this microbe needs to make the chemical process... Maybe this could be another problem... The volcanic habitat it's very hot (and hard to emulate)...
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From the opening of the article:
Take a pot of scalding water, remove all the oxygen, mix in a bit of poisonous carbon monoxide, and add a pinch of hydrogen gas. It sounds like a recipe for a witch's brew. It may be, but it is also the preferred environment for a microbe known as Carboxydothermus hydrogenoformans.
If you remove the oxygen, won't you be left with Hydrogen anyway?
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This is very interesting indeed. A low-energy process by which free hydrogen can be produced. But a few questions.
- The article mentions that oxygens need to be removed from the water; How much energy does this require?
- In what quantities is the hydrogen produced; What quantities is needed to power a fuel cell?
- How efficient is this process compared to electrolysis.
Also it says that the water needs to be boiling in order for the microbes to have optimal conditions; But then of course the energy has to come from somewhere. The water might be heated using solar or wind power i guess. Which brings us back to to the storage problem, and most hydrogen storage solutions(not based on pressure-tanks) require heat to release the hydrogen.
No, the article says that the organism intakes CO and H2O and expels H2. This does not mean that a simple reaction occurs with CO and H2O as reactants and H2 as a product.
From TFA:
The bug boasts at least five different forms of a protein machine, dubbed carbon monoxide deyhydrogenase, that is able to manipulate the poisonous gas. Each form of the machine appears to allow the organism to use carbon monoxide in a different way. Most other organisms that live on carbon monoxide have only one form of this machine. In other words, while other organisms may have the equivalent of a modest mixing bowl to process their supper of carbon monoxide, this species has a veritable food processor, letting it gorge on a hot spring buffet all day.
So apparently the CO is acted upon by the proteins, and likely the H2O is used to sustain other life processes in some other way, and the H2 is simply the end result of some metabolic process at the end. If you want to account for the C and the O's, they probably went into forming some protein somewhere.
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When you read the article they have these things that look like explanatory hyperlinks to words like 'water', 'research' and 'scientists', but are, instead, commercials tied to the words. What is this called? Whatever it's called, it's VERY IRRITATING. And I wish Slashdot would not use submissions based on web pages that do this. When I am tricked into an advertisement this way I feel like I've crawled into bed with someone who suprises you with both male and female sex organs. It just doesn't seem right to be surprised like that.