期刊
FUEL
卷 98, 期 -, 页码 95-102出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2012.03.048
关键词
Hot coal gas; Mesoporous materials; Rare earth oxides; H2S removal
资金
- National Natural Science Foundation of China
- BAOSTEEL Group Corporation [50876122]
We prepared LaMeOx/MCM-41 (Me = Co, Zn, Fe) sorbents of high specific surface area by means of sol-gel method. For comparison purposes, the unsupported composite metal oxides were also synthesized. Breakthrough and total sulfur capacity over LaFeO3/M41 were 3.24 and 3.70 g, respectively, significantly higher than the former (0.35 g) over unsupported LaFeO3. The materials were characterized using Brunauer, Emmett and Teller (BET), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), temperature-programmed reduction (H-2-TPR), temperature-programmed reduction and sulfidation (TPRS), and high-resolution transmission electron spectroscopy (HRTEM) techniques. Their ability for H2S removal was evaluated over a fixed-bed reactor, and the effects of reaction temperature, feed composition, and support on desulfurization were studied. The results of successive sulfidation/regeneration cycles (x 10) revealed that the LaFeO3/M41 sorbent was stable enough for desulfurization of hot coal gas in chemical industry. (C) 2012 Elsevier Ltd. All rights reserved.
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