持続可能な消費:責任消費、ダイエットのヒント新機能:電気とCO2からの炭化水素!

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新機能:電気とCO2からの炭化水素!

メッセージ以外のluパー » 31/03/12, 19:33

Nouvelles fraîche: un chercheur américain est parvenu a synthétiser de l'isobutanol à partir d'électricité et de CO2et d'une réaction biochimique. Une espèce de phtosynthèse en quelque sorte.

Tout frais: publié ce 29 mars 2012

Liao and his team genetically engineered a lithoautotrophic microorganism known as Ralstonia eutropha H16 to produce isobutanol and 3-methyl-1-butanol in an electro-bioreactor using carbon dioxide as the sole carbon source and electricity as the sole energy input.


http://www.sciencedaily.com/releases/20 ... 171607.htm

L'intérêt: stocker l'énergie solaire sous forme de carburant, c'est à dire avec un ratio energie/poids largement supérieur à celui des batteries et certainement plus commode que sous forme d'hydrogène.
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象最高名誉éconologuePCQ .....私はあまりにも慎重だけど、十分な金持ちではないし、本当にCO2を保存するのが面倒! http://www.caroloo.be

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メッセージ以外のluパー dedeleco » 31/03/12, 20:31

J'avais vu, mais bien compliqué, acide formique avec l'électricité solaire, puis bactéries donnant des alccools lourds mais aussi bien et plus simple, faire du pétrole avec des algues au soleil et dans le CO2 .

très optimistes sur le futur :
"We've been able to separate the light reaction from the dark reaction and instead of using biological photosynthesis, we are using solar panels to convert the sunlight to electrical energy, then to a chemical intermediate, and using that to power carbon dioxide fixation to produce the fuel," Liao said. "This method could be more efficient than the biological system."

Liao explained that with biological systems, the plants used require large areas of agricultural land. However, because Liao's method does not require the light and dark reactions to take place together, solar panels, for example, can be built in the desert or on rooftops.

Theoretically, the hydrogen generated by solar electricity can drive CO2 conversion in lithoautotrophic microorganisms engineered to synthesize high-energy density liquid fuels. But the low solubility, low mass-transfer rate and the safety issues surrounding hydrogen limit the efficiency and scalability of such processes. Instead Liao's team found formic acid to be a favorable substitute and efficient energy carrier.

Liao and his team genetically engineered a lithoautotrophic microorganism known as Ralstonia eutropha H16 to produce isobutanol and 3-methyl-1-butanol in an electro-bioreactor using carbon dioxide as the sole carbon source and electricity as the sole energy input.

"Instead of using hydrogen, we use formic acid as the intermediary," Liao said. "We use electricity to generate formic acid and then use the formic acid to power the CO2 fixation in bacteria in the dark to produce isobutanol and higher alcohols."

The electrochemical formate production and the biological CO2 fixation and higher alcohol synthesis now open up the possibility of electricity-driven bioconversion of CO2 to a variety of chemicals. In addition, the transformation of formate into liquid fuel will also play an important role in the biomass refinery process, according to Liao.

"We've demonstrated the principle, and now we think we can scale up," he said. "That's our next step."


Il y a une armada de publications de ce type.
comme annexé dans :
http://www.physorg.com/news/2012-03-mic ... -fuel.html

http://www.sciencedaily.com/releases/20 ... 112104.htm
Using the Energy in Oil Shale Without Releasing Carbon Dioxide in a Greenhouse World


http://www.physorg.com/news187031401.html#firstCmt
Catalyst could power homes on a bottle of water, produce hydrogen on-site
http://www.physorg.com/news218721227.html#firstCmtBESC scores a first with isobutanol directly from cellulose

http://www.physorg.com/news179683624.html#firstCmt
Researchers engineer bacteria to turn carbon dioxide into liquid fuel

http://www.physorg.com/news219567788.html#firstCmt
Researchers engineer E. coli to produce record-setting amounts of alternative fuel

et plein d'autres très intéressantes dans ces liens précédents !!

L'imagination a des possibilités immenses dans le renouvelable, à ne pas négliger et à développer !!

Le soleil à 1KW/m2 peut être utiliser suivant pleins de méthodes , sans réduire notre consommation d'énergie, juste éviter de polluer et d'épuiser ce qui est non renouvelable !!
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