Shell Oil Comapny

John M Harryman

Howard L Fong

David A Van Kleeck

A process of utilizing a portion of a coal feedstock to a coal gasification plant for the removal of sulfur compounds from a gaseous stream comprising sulfur dioxide and hydrogen sulfide, particularly a tail gas stream from a sulfur recovery plant, by contacting the gaseous stream with the coal feedstock. The laden coal is subsequently fed to a coal gasification plant and gasified to make synthesis gas.

Use of coal feedstock to a coal gasification plant for removing sulfur

A process for the removal of H.sub.2 S from sour gaseous streams is disclosed in which the sour gaseous stream is contacted with a solution containing solubilized iron chelates of nitrilotriacetic acid. The contacting is carried out in first and second contacting zones, the first being a gas-solution mixture formation zone and the second comprising a plurality of contacting sections adapted to provide reaction of the H.sub.2 S in the sour gaseous stream with the iron in the contacting solution without plugging due to deposition of sulfur.

Removal of H.sub.2 S from gas streams

A process for the removal of H.sub.2 S from sour gaseous streams is disclosed in which the sour gaseous stream is contacted with a solution containing solubilized iron chelates of a specified organic acid or acids. The contacting is carried out in first and second contacting zones, the first being a gas-solution mixture formation zone and the second comprising a plurality of contacting sections adapted to provide reaction of the H.sub.2 S in the sour gaseous stream with the iron in the contacting solution without plugging due to deposition of sulfur.

H.sub.2 S removal from gas streams

A process for separating substantially all of the C.sub.3 and heavier components and a major portion of the C.sub.2 component from a natural gas stream using a cryogenic process. The process uses a rectifying column in combination with a fractionating column to separate the C.sub.2 and heavier components with the reflux for the rectifying column being supplied by compressing a small portion of the overheads and condensing it via heat exchange with the overheads stream.

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Katy, TX, United States of America

John M Harryman