Development of a Hot-Gas Cleanup System for Integrated Coal-Gasification/Molten-Carbonate Fuel-Cell Power Plants. Quarterly Report No. 1, October 1-December 31, 1982 (Iron Orthosilicate, Cobalt Titanate, Iron Chromite, Cobalt Aluminate, Manganous Oxide).

摘要

The overall objectives of this program are to conduct: (1) Laboratory-scale and bench-scale studies of a conceptual process that uses an air-regenerable mixture of metal oxide sorbents to remove sulfur-containing gases (such as hydrogen sulfide) from coal-derived fuel gas at 1200 exp 0 F. This mixture promotes the direct production of elemental sulfur upon regeneration. (2) Laboratory-scale studies of a process that uses molten-carbonate-containing porous ceramics to remove hydrochloric acid (HCl) and possibly heavy hydrocarbons and trace-element-containing compounds from coal-derived fuel gas at 1200 exp 0 F. (3) An engineering and economic assessment of the above processes. During this reporting period, preparations were made for laboratory-scale testing of sorbents for both processes. Five metal oxide sorbents were selected for laboratory-scale testing of their sulfur removal characteristics, sulfur removal capacities, and elemental sulfur production capabilities. These were (1) manganous oxide, (2) cobalt aluminate, (3) iron chromite, (4) iron orthosilicate, and (5) cobalt titanate. The laboratory-scale fixed-bed reactor system for testing the metal oxide sorbents was readied this quarter. Several modifications were made to the existing system. Testing of the metal oxide sorbents will begin next quarter. The selection of two HCl removal sorbents for laboratory-scale testing was also made this quarter. The molten alkali mixtures chosen were a 52% lithium carbonate/48% sodium carbonate mixture and a 43% lithium carbonate/57% potassium carbonate mixture with melting points of 496 and 488 exp 0 C, respectively. The porous ceramic selected for supporting the molten carbonate mixtures was magnesia, MgO. (ERA citation 08:032952)