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
Source Publication Title
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.