-187- OBJECTIVESThe overall objective of the General Electric Hot Gas Cleanup (HGCU) Program is to develop a commercially viable technology to remove sulfur, particulates, and halogens fiom a high-temperature fuel gas stream using a moving bed, regenerable mixed metal oxide sorbent based process. This technology will ultimately be incorporated into advanced Integrated Gasification Combined Cycle (IGCC) power generation systems. In IGCC applications, HGCU is projected to improve overall power generation cycle efficiencies by 1 to 2% compared with conventional low-temperature cleanup technologies, and will also offer the potential for reducing plant capital and operating costs.The HGCU Program is based on the design and demonstration of the HGCU system in a test facility made up of a pilot-scale fixed bed gasifier, a HGCU system, and a turbine simulator in Schenectady, NY, at the General Electric Research and Development Center (GE-CRD). A modified GE MS6000 gas turbine combustor and a film-cooled, first-stage LM6000 nozzle assembly are incorporated into the turbine simulator.The objectives of the turbine simulator testing are (1) to demonstrate the suitability of fuel gas processed by the HGCU system for use in state-of-the-art gas turbines firing at "F" conditions (2350°F rotor inlet temperature) and (2) to quantify the combustion characteristics and emissions on low-Btu (LBtu) fuel gas. The turbine simulator program also includes the development and operation of experimental combustors based on the rich-quench-lean concept (RQL) to minimize the conversion of ammonia and other fuel-bound nitrogen species to NOx during combustion.The HGCU system and turbine simulator have been designed to process approximately 8000 l b k of low heating value fuel gas produced by the GE fixed bed gasifier. The raw fuel gas is provided to the HGCU and turbine simulator systems at 280 psig and 1000°F. The HGCU system has utilized several mixed metal oxide sorbents -including zinc ferrite, zinc titanate, and Z-Sorb (a proprietary zinc-based sorbent developed by Phillips Petroleum Company) -with the objective of demonstrating good sulfur removal and mechanical attrition resistance as well as economic cost characteristics. Demonstration of halogen removal and the characterization of alkali and trace metal concentrations in the fuel gas are subordinate objectives of the overall program. BACKGROUND INFORMATION
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