Gas Cleanup Systems for Application to the MERC Stirred/Fixed Bed Gasifier

摘要

A preliminary review of commercially available processes and equipment capable of cleaning the fuel gas produced by an existing stirred/fixed bed gasifier at the Morgantown Energy Research Center was conducted. The criteria for determining the degree of fuel gas cleanup were established from a consideration of environmental standards, gas turbine specifications and combustor requirements. Literature survey and consultations with vendors were conducted to obtain information regarding available fuel gas desulfurization, particulate removal and for separation processes and concepts. A tar and particulate removal system consisting of a cyclone, quencher, venturi scrubber and de-entrainer is recommended. Acid gases may be removed from the producer gas by means of a Stretford-Holmes process for the removal of H sub 2 S only or an Alkazid-DIK process for the removal of H sub 2 S plus CO sub 2 . In the latter case, a small Stretford-Holmes process plant may be used to treat the Alkazid off-gas. (ERA citation 03:013624)