Catalytic reduction of sulfur dioxide by carbon monoxide over nickel and lanthanum - Nickel supported on alumina

被引:23
作者
Lee, HM [1 ]
Han, JD [1 ]
机构
[1] Changwon Natl Univ, Dept Chem Engn, Chang Won 641773, South Korea
关键词
D O I
10.1021/ie010806n
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
The selective reduction of sulfur dioxide with carbon monoxide to elemental sulfur was studied over gamma-Al2O3 supported sulfide catalysts of Ni and LaNi with different loadings of the metals. When the feed conditions were properly optimized, about 97% conversion of sulfur dioxide and selectivity to elemental sulfur was achieved at temperatures above 400 degreesC. Parametric studies on the performance of the catalyst were conducted. The parametric studies include temperature, space velocity, and molar ratio of CO to SO2 in the feed. Catalyst samples before and after the reaction were characterized by Brunauer-Emmett-Teller measurements, X-ray powder diffraction, and X-ray photoelectron spectroscopy to relate the phase composition to the activation behavior and catalytic performance. The active phase of Ni was detected as NiS2, and the COS intermediate mechanism was proposed.
引用
收藏
页码:2623 / 2629
页数:7
相关论文
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