Abstract
GE is developing a moving-bed, high temperature desulfurization system for use in integrated gasification combined cycle (IGCC) power generation systems. Reusable zinc-based mixed-metal oxide sorbents are being developed for this process, now being tested at the pilot plant scale. Recent tests have focused on: (1) evaluation of Z-Sorb{trademark} III sorbent, a proprietary H{sub 2}S sorbent developed by Phillips Petroleum Company, and (2) construction and testing of a circulating fluidized bed (CFB) reactor for HCl removal. Z-Sorb{trademark} III sorbent lost more than 50% of its reactivity and sulfur absorption capacity in less than 200 hours of pilot plant testing. Interactions between the sorbent and steam in the coal gas (and/or regeneration gas) appear to be a likely cause for the loss in reactivity. Development and testing of alternative sorbents is now underway.
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