New Artificial Leaf Makes Methanol and Oxygen From CO2
The new technology, outlined in a paper published in the journal Nature Energy, was inspired by the way plants use energy from sunlight to turn carbon dioxide into food.
Yimin Wu, an engineering professor at the University of Waterloo who led the research said, “We call it an artificial leaf because it mimics real leaves and the process of photosynthesis. A leaf produces glucose and oxygen. We produce methanol and oxygen.”
Making methanol from carbon dioxide, the alleged primary contributor to global warming, would both reduce greenhouse gas emissions and provide a substitute for the fossil fuels that create them.
The key to the process is a cheap, optimized red powder called cuprous oxide.
Engineered to have as many eight-sided particles as possible, the powder is created by a chemical reaction when four substances – glucose, copper acetate, sodium hydroxide and sodium dodecyl sulfate – are added to water that has been heated to a particular temperature.
The powder then serves as the catalyst, or trigger, for another chemical reaction when it is mixed with water into which carbon dioxide is blown and a beam of white light is directed with a solar simulator.
“This is the chemical reaction that we discovered,” said Wu, who has worked on the project since 2015. “Nobody has done this before.”
The reaction produces oxygen, as in photosynthesis, while also converting carbon dioxide in the water-powder solution into methanol. The methanol is collected as it evaporates when the solution is heated.
Next steps in the research include increasing the methanol yield and commercializing the patented process to convert carbon dioxide collected from major greenhouse gas sources such as power plants, vehicles and oil drilling.
“I’m extremely excited about the potential of this discovery to change the game,” said Wu, a professor of mechanical and mechatronics engineering, and a member of the Waterloo Institute for Nanotechnology. “Climate change is an urgent problem and we can help reduce CO2 emissions while also creating an alternative fuel.”
Wu collaborated on the paper, Facet-dependent active sites of a single Cu2O particle photocatalyst for CO2 reduction to methanol, with Tijana Rajh and other researchers at the Argonne National Laboratory in Illinois, as well as scientists at California State University, Northridge, and the City University of Hong Kong.
Another looks good, sounds good idea, that functions. We’re missing the operating parameters like, must the CO2 be a pure flow, from the atmosphere, or will an effluent gas flow do? Then there are the costs to build them and a unit’s lifespan. Perhaps there is a market for this idea, but there is a long way to go to get to scale to produce fuel in volume at a price folks will pay. The best news is it makes a liquid fuel that stores without being under pressure.
Source: https://newenergyandfuel.com/http:/newenergyandfuel/com/2019/11/06/new-artificial-leaf-makes-methanol-and-oxygen-from-co2/
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