18-09-2014 дата публикации
Номер: US20140271451A1
The present invention relates to a process for purifying a gas stream comprising hydrogen sulfide or mercaptans, or mixtures thereof. The gas stream can be a sour natural gas stream, a landfill gas or an industrial gas stream. The process comprises contacting the gas stream at effective absorption conditions including an absorption temperature less than about 300° C. with a solid absorbent effective to absorb the hydrogen sulfide, or mercaptans or mixtures thereof to provide a purified gas stream. Method is useful for treating gas streams having up to 90 vol-% hydrogen sulfide, or treating highly pure hydrogen streams. The invention is useful as a guard bed for fuel cells and sensitive laboratory instruments. The invention can also be employed to treat steam reformer product hydrogen streams without the need for further compression of the product hydrogen streams. 1. A process for sweetening a sour gas stream to provide a sweetened gas stream , said process comprising contacting the sour gas stream comprising hydrogen or methane and a sour impurity selected from the group consisting of hydrogen sulfide , mercaptans and mixtures thereof at effective absorption conditions including an absorption temperature less than or equal to 300° C. with a solid absorbent comprising a copper oxide , said solid absorbent being selective for the regenerable absorption of said sour impurity to absorb at least a portion of the sour impurity to provide the sweetened gas stream having a reduced amount of the sour impurity.2. The process of claim 1 , wherein the sour gas stream is a sour natural gas stream or a landfill gas stream or an industrial gas stream or a hydrogen gas stream.3. The process of claim 1 , wherein the sour gas stream is a hydrogen stream comprising hydrogen sulfide and the sweetened gas stream comprises less than 10 ppbv hydrogen sulfide.4. The process of claim 1 , wherein the sour gas stream is a sour natural gas stream or a landfill gas stream and comprises less ...
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