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Trim Sulfur Removal in Integrated Gasification Combined Cycle (IGCC) Flowsheet Disclosure Number: IPCOM000020523D
Publication Date: 2003-Nov-25
Document File: 1 page(s) / 21K

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The Prior Art Database

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Trim Sulfur Removal in Integrated Gasification Combined Cycle (IGCC) Flowsheet

In a coal-based integrated gasification combined cycle (IGCC) flowsheet, a non-deep amine-type system can be used to meet the environmental regulations for the synthesis gas stream (50-100 parts per million by volume (ppmv)) when that stream is ultimately burned in a combined cycle system to make electric power. If catalytic systems such as those for production of methanol (such as the Liquid Phase Methanol (LPMEOH™) Process), dimethyl ether (such as the Liquid Phase Dimethyl Ether (LPDME™) Process), or hydrocarbons (by Fischer-Tropsch chemistry) are to be used to coproduce one or more of these high-value products with the electric power, an additional stage of sulfur removal will likely be necessary to reduce the concentration to the maximum concentration that can be tolerated by the catalyst.

As an alternative to the non-deep sulfur removal offered by amine systems, an adsorbent comprised of copper oxide on carbon can be operated with regeneration to perform the first stage of sulfur removal from 50-100 ppmv to 1 ppmv. Regeneration of the adsorbent can be accomplished using steam produced from the downstream (exothermic) catalytic process. The regeneration gas, still with low sulfur content, is rejected to the downstream IGCC power unit.

Disclosed by Joseph Klosek, Timothy C. Golden, and Bharat L. Bhatt

Air Products and Chemicals, Inc.