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Transmission electron microscopy image of carbon nitride created by the reaction of carbon dioxide and Li3N.
(Phys.org) -- A materials scientist at Michigan Technological University has discovered a chemical reaction that not only eats up the greenhouse gas carbon dioxide, it also creates something useful. And, by the way, it releases energy.
Making carbon-based products from CO2 is nothing new, but carbon dioxide molecules are so stable that those reactions usually take up a lot of energy. If that energy were to come from fossil fuels, over time the chemical reactions would ultimately result in more carbon dioxide entering the atmosphere—defeating the purpose of a process that could otherwise help mitigate climate change.
Professor Yun Hang Hu’s research team developed a heat-releasing reaction between carbon dioxide and Li3N that forms two chemicals: amorphous carbon nitride (C3N4), a semiconductor; and lithium cyanamide (Li2CN2), a precursor to fertilizers.
“The reaction converts CO2 to a solid material,” said Hu. “That would be good even if it weren’t useful, but it is.”
And how much energy does it release? Plenty. Hu’s team added carbon dioxide to less than a gram of Li3N at 330 degrees Celsius, and the surrounding temperature jumped almost immediately to about 1,000 degrees Celsius, or 1,832 degrees Fahrenheit, about the temperature of lava exiting a volcano.
Hu’s work is funded by the National Science Foundation and detailed in the article “Fast and Exothermic Reaction of CO2 and Li3N into C–N-Containing Solid Materials,” authored by Hu and graduate student Yan Huo and published in the Journal of Physical Chemistry.
less energy needed to produce the reacting agent than is given out by the reaction
Originally posted by spacedonk
url=http://phys.org/news/2012-05-lemons- can it now be commercialised and industrialised??!!??
Originally posted by choos
reply to post by spacedonk
how is lithium nitride made? hopefully it works out but its sounding almost like free energy..
perhaps im misunderstanding something.
Originally posted by choos
reply to post by PurpleChiten
im confused by the total energy, (not good at chemistry btw)
turning CO2 to a solid will require energy, making Li3N will require energy. heating the Li3N to 300degrees will require energy.
combine them all will give about 1000degrees.
so is it still a positive energy output or negative?
Originally posted by Vitruvius
Darn you, Purple! You made me commit attempted chemistry! First you show a flaw in a process this world needs then you say, "No, I see it."
Well I didn't! You, sir, are guilty of nerd sniping!
Ok, you did say the result was lithium oxide. What I came up with was O4Li2N6.
Clearly, I'm not a chemist. But that stuff is 0.5 nitrogen. Is that what lithium oxide is? Does the nitrogen separate? Why would the authors not mention this? AAUGH!
Hook me up, man. I need some clarifiation, whatever ya got!