ALEXANDRIA, Va., April 21 -- United States Patent no. 12,605,672, issued on April 21, was assigned to Iogen Corp. (Ottawa).
"Method and system for upgrading biogas using PSA" was invented by Brian Foody (Ottawa), Jeffrey S. Tolan (Ottawa) and John Dechman (Ottawa).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method for upgrading biogas comprising methane and nitrogen, where the biogas is provided in at least one pressurized vessel at a pressure of at least 65 atm (6586 kPa). The method includes a pressure swing adsorption (PSA) cycle having a feed phase, where biogas is fed into a first adsorbent bed when the inlet end is open and the outlet end is closed, followed by a first depressurization phase, where...