Inventors:
Daniel P. Leta - Flemington NJ, US
Preeti Kamakoti - Summit NJ, US
Jack W. Johnson - Clinton NJ, US
Peter I. Ravikovitch - Princeton NJ, US
Harry Deckman - Clinton NJ, US
Assignee:
EXXONMOBIL RESEARCH AND ENGINEERING COMPANY - Annandale NJ
International Classification:
B01D 53/00
C10L 3/10
C01B 17/04
Abstract:
A cyclic process for selectively separating hydrogen sulfide from a gas mixture including COis operated by contacting the gas mixture under sorption conditions with a non-aqueous sorbent comprising a basic non-protogenic nitrogenous compound to react the HS with the basic compound so that the HS can be sorbed by the compound. The compound containing the sorbed HS can then be subjected to desorption conditions by which the HS is desorbed and the sorbent readied for another sorption step in the cycle. The basic nitrogenous compound can be carried on a porous solid sorbent, e.g., a solid oxide such as alumina, silica, silica-alumina, zeolites, or a mesoporous and/or macroporous solid oxide. The process may be operated using a pressure swing, temperature swing, partial pressure swing, purge displacement, or a combination thereof between the sorption and desorption portions of the cycle, preferably in a rapid cycle operation.
