Researchers at the U.S. Department of Energy’s Idaho National Laboratory have developed a new process that can efficiently convert captured carbon dioxide to syngas (hydrogen and carbon monoxide mixtures) used to make fuels and chemicals at low temperatures and pressures. Researchers said that this new technology is of great significance for the promotion of carbon capture and storage technology and reduction of carbon dioxide emissions.
The traditional method of recovering carbon from carbon dioxide requires high temperature and high pressure because carbon dioxide does not dissolve in water for a long time at lower temperatures. To solve this problem, Idaho National Laboratory researchers used a polarizable solvent as electrolyte medium in a new process. This liquid, when exposed to chemical reagents, can switch polarity, make carbon dioxide more readily soluble, and be converted to syngas by electrochemical methods. Experiments have shown that the new process works best at pressures of 25 degrees Celsius and 40 pounds per square inch (0.28 megapascals) and the conversion rate exceeds 70%.
Carbon capture and sequestration as a means to reduce greenhouse gas emissions has attracted the attention of many countries, but excessive costs have limited the use of this technology. If the captured carbon dioxide can be converted into a usable product, this situation may be change. The researchers said that the newly developed process integrates technologies in both carbon capture and sequestration and carbon dioxide utilization, and for the first time proved that it is possible to produce syngas directly from the captured carbon dioxide, which promotes the application of carbon capture technology and limits global carbon dioxide. Emissions are of great significance.
Researchers have applied for temporary patents for new technologies in the United States, and related papers have been published in the latest issue of the “Green Chemistry†magazine of the Royal Society of Chemistry. (Reporter Liu Haiying)
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