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Methane-rich syngas production from hydrocarbon fuels using multi-functional catalyst/capture agent

United States Patent

9,562,203
February 7, 2017
View the Complete Patent at the US Patent & Trademark Office
U.S. Department of Energy - Visit the Office of the Assistant General Counsel for Technology Transfer & Intellectual Property Website
The disclosure provides a gasification process for the production of a methane-rich syngas at temperatures exceeding 400.degree. C. through the use of an alkali hydroxide MOH, using a gasification mixture comprised of at least 0.25 moles and less than 2 moles of water for each mole of carbon, and at least 0.15 moles and less than 2 moles of alkali hydroxide MOH for each mole of carbon. These relative amounts allow the production of a methane-rich syngas at temperatures exceeding 400.degree. C. by enabling a series of reactions which generate H.sub.2 and CH.sub.4, and mitigate the reforming of methane. The process provides a methane-rich syngas comprised of roughly 20% (dry molar percentage) CH.sub.4 at temperatures above 400.degree. C., and may effectively operate within an IGFC cycle at reactor temperatures between 400-900.degree. C. and pressures in excess of 10 atmospheres.
Siefert; Nicholas S. (Jefferson Hills, PA), Shekhawat; Dushyant (Morgantown, WV), Berry; David A. (Morgantown, WV), Surdoval; Wayne A. (Monroeville, PA)
U.S. Department of Energy (Washington, DC)
14/ 554,266
November 26, 2014
GOVERNMENT INTERESTS The United States Government has rights in this invention pursuant to the employer -employee relationship of the Government to the inventors as U.S. Department of Energy employees and site-support contractors at the National Energy Technology Laboratory.