Department of Chemistry
Desulfurization of hot coal gas over high-surface-area LaMeOx/MCM-41 sorbents
We prepared LaMeO x/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 LaFeO 3/M41 were 3.24 and 3.70 g, respectively, significantly higher than the former (0.35 g) over unsupported LaFeO 3. 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 H 2S 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 (×10) revealed that the LaFeO 3/M41 sorbent was stable enough for desulfurization of hot coal gas in chemical industry. © 2012 Elsevier Ltd. All rights reserved.
H 2S removal, Hot coal gas, Mesoporous materials, Rare earth oxides
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Link to Publisher's Edition
Liu, B. S., Z. Y. Wan, Y. P. Zhan, and C. T. Au. "Desulfurization of hot coal gas over high-surface-area LaMeOx/MCM-41 sorbents." Fuel 98 (2012): 95-102.