US EPA

1510068 

Journal Article 

Development of novel copper-based sorbents for hot-gas cleanup. Final technical report, September 1, 1991--August 31, 1992 

Abbasian, J; Hill, AH; Wangerow, JR; Flytzani-Stephanopoulos, M; Bo, L 

1992 

NTIS/02988707_2 

GRA and I 

14 

34 

Progress rept. red by Department of Energy, Washington, DC. jective of this investigation was to evaluate several novel copper-based binary oxides for their suitability as regenerable sorbents for hot gas cleanup application in the temperature range of 650(degree) to 850(degree)C. To achieve this objective, several novel binary oxides of copper were systematically evaluated and ranked in terms of their high-temperature stability against reduction to metal, sulfidation reactivity, and regenerability. The sorbents studied included oxides of chromium, cerium, aluminum, magnesium, manganese, titanium, iron, and silicon. The results of initial testing indicated that mixed binary oxides of copper with chromium (CuCr(sub 2)O(sub 4)) and cerium (CuO(circle dot)CeO(sub 2)) were the most promising sorbents for such high temperature gas cleanup applications. These two sorbents were further evaluated in cyclic sulfidation/regeneration tests in 10--15 cycles to determine the effect of operating conditions on their performance. The results of this investigation indicate that the two selected sorbents, copper-chromium and copper-cerium, are capable of removing H(sub 2)S from the hot fuel gas to very low levels (<10 ppmv) at temperatures as high as 850(degree)C with good sorbent regenerability in cyclic process. These sorbents should be further studied to achieve optimum sorbent composition for hot gas cleanup application. 

Coal Gas; Hydrogen Sulfides; Adsorbents; Hot Gas Cleanup; Cerium Oxides; Chemical Reaction Kinetics; Chromium Oxides; Copper Oxides; Performance Testing; Progress Report; Regeneration; Removal; Sulfidation; Air pollution abatement; EDB/010404; EDB/010402