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- W162199226 abstract "Thermogravimetric analysis (TGA) and flow-reactor experiments were used to study sulfidation-regeneration of highly porous CuO-Al{sub 2}O{sub 3} sorbents. In TGA studies, sulfidation of reduced sorbents produced a high-temperature form of digenite (CU{sub 9 + x}S{sub 5}) as the major crystalline product. When a platinum pan was used in the TGA, significant sulfur chemisorption on alumina occurred. Sulfur chemisorption on alumina was eliminated by use of a quartz sample pan. Reaction of the mixed-oxide sorbents with a mixture of H{sub 2}S, H{sub 2}, H{sub 2}O, and N{sub 2} in a packed-bed microreactor, at temperatures between 550 and 800{degrees}C, yielded prebreakthrough outlet-H{sub 2}S levels considerably lower than those predicted by the sulfidation equilibrium of metallic copper. Independent reduction experiments confirm that alumina stabilizes CuO against complete reduction to Cu. With this mechanism at work, low prebreakthrough H{sub 2}S levels are attributed to sulfidation reactions of copper at oxidation states of + 1 or + 2. The sulfided sorbents were completely regenerable in air/N{sub 2} mixtures with no deterioration of subsequent sulfidation performance." @default.
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- W162199226 date "1989-07-01" @default.
- W162199226 modified "2023-09-27" @default.
- W162199226 title "High-temperature sulfidation-regeneration of CuO-Al sub 2 O sub 3 sorbents" @default.
- W162199226 hasPublicationYear "1989" @default.
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