ALEXANDRIA, Va., Dec. 9 -- United States Patent no. 12,492,154, issued on Dec. 9, was assigned to Osaka Gas Co. Ltd. (Osaka, Japan).
"Method for producing fuel gas" was invented by Hirofumi Ohtsuka (Osaka, Japan) and Shimpei Norioka (Osaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a first step of causing hydrogen and carbon oxide to react with each other in a presence of a first catalyst to obtain a first fuel gas 2 that contains 2% to 10% hydrogen by volume after dehydration; and a second step of consuming the hydrogen in the first fuel gas 2 to obtain a second fuel gas 4 with a reduced hydrogen concentration. The first catalyst includes a methanation catalyst. The second step includ...