A 200-hour test by the American Chemical Society helped the commercial viability of clean coal become a step closer. The research involved the study of two kinds of carbon-capture systems: Syngas Chemical Looping and Coal-Direct Chemical Looping technologies. Researchers "used sub-bituminous and lignite coals, which are the main source of carbon dioxide emissions at U.S. coal-fired power plants. Carbon dioxide captured during operation had a purity of 99.5%," ACS said.
Published in Brief: