The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 11, 2016
Filed:
Sep. 26, 2012
Eig, Inc., Sunnyvale, CA (US);
Sri International, Menlo Park, CA (US);
Eli Gal, Sunnyvale, CA (US);
Gopala N. Krishnan, Sunnyvale, CA (US);
Indira S. Jayaweera, Fremont, CA (US);
EIG, Inc., Sunnyvale, CA (US);
SRI International, Menlo Park, CA (US);
Abstract
Low-cost and energy-efficient COand HS capture is provided obtaining greater than 99.9% capture efficiency from pressurized gas. The acid species are captured in an ammonia solution, which is then regenerated by stripping the absorbed species. The solution can capture as much as 330 grams of COand HS per 1000 gram of water and when regenerated it produces pure pressurized acid gas containing more than 99.7% COand H2S. The absorption of the acid species is accomplished in two absorbers in-series, each having multiple stages. More than 95% of the acid species are captured in the first absorber and the balance is captured in the second absorber to below 10 ppm concentration in the outlet gas. The two absorbers operate at temperatures ranging from 20-70 degrees Celsius. The two absorbers and the main stripper of the alkaline solution operate at similar pressures ranging from 5-200 bara.