Gas Technology Institute

Raja A Jadhav

Shain-Jer Doong

Francis Sikming Lau

Shain J Doong

A system for the selective removal of CO, HS, and Hfrom a gaseous fluid mixture comprising CO, HS, and H, which system includes a first membrane section having a nonporous metal oxide membrane, a second membrane section having a CO-selective membrane, and a third membrane section having an H-selective membrane. Each membrane section has a feed side and a permeate side and the membrane sections are arranged in series whereby the gaseous fluid mixture contacts the feed side, in sequence, of the first membrane section, the second membrane section and the third membrane section, resulting first in the separation or removal of HS, second in the separation or removal of CO, and third in the separation or removal of H. The process can be used to process synthesis gas generated from the gasification or reforming of carbonaceous materials for hydrogen production and carbon dioxide capture.

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A nonporous metal carbonate membrane for selective separation of COfrom a CO-containing fluid having a porous substrate having a feed side and a permeate side. The membrane is also suitable for removal of HS that may be present in the fluid.

A method for removal of mercury from a gaseous stream containing the mercury, hydrogen and/or CO, and hydrogen sulfide and/or carbonyl sulfide in which a dispersed Cu-containing sorbent is contacted with the gaseous stream at a temperature in the range of about 25&#xb0; C. to about 300&#xb0; C. until the sorbent is spent. The spent sorbent is contacted with a desorbing gaseous stream at a temperature equal to or higher than the temperature at which the mercury adsorption is carried out, producing a regenerated sorbent and an exhaust gas comprising released mercury. The released mercury in the exhaust gas is captured using a high-capacity sorbent, such as sulfur-impregnated activated carbon, at a temperature less than about 100&#xb0; C. The regenerated sorbent may then be used to capture additional mercury from the mercury-containing gaseous stream.

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Naperville, IL, United States of America

Raja A Jadhav