title: Highly stable and regenerable Mn-based/SBA-15 sorbents for desulfurization of hot coal gas.
abstract: A series of mesoporous xCuyMn/SBA-15 sorbents with different Cu/Mn atomic ratios were prepared by wet impregnation method and their desulfurization performance in hot coal gas was investigated in a fixed-bed quartz reactor in the range of 700-850°C. The successive nine desulfurization-regeneration cycles at 800°C revealed that 1Cu9Mn/SBA-15 presented high performance with durable regeneration ability due to the high dispersion of Mn(2)O(3) particles incorporated with a certain amount of copper oxides. The breakthrough sulfur capacity of 1Cu9Mn/SBA-15 observed 800°C is 13.8 g S/100g sorbents, which is remarkably higher than these of 40 wt%LaFeO(3)/SBA-15 (4.8 g S/100g sorbents) and 50 wt%LaFe(2)O(x)/MCM-41 (5.58 g S/100g sorbents) used only at 500-550°C. This suggested that the loading of Mn(2)O(3) active species with high thermal stability to SBA-15 support significantly increased sulfur capacity at relatively higher sulfidation temperature. The fresh and used xCuyMn/SBA-15 sorbents were characterized by means of BET, XRD, XPS, XAES, TG/DSC and HRTEM techniques, confirmed that the structure of the sorbents remained intact before and after hot coal gas desulfurization.
authors: Department of Chemistry, Tianjin University, Tianjin, PR China.
authors: F M
authors: FM
authors: Zhang
authors: B S
authors: BS
authors: Liu
authors: Y
authors: Y
authors: Zhang
authors: Y H
authors: YH
authors: Guo
authors: Z Y
authors: ZY
authors: Wan
authors: Fazle
authors: F
authors: Subhan
mesh_terms: D000327:Adsorption; D000393:Air Pollutants / Q000737:chemistry*; D000397:Air Pollution / Q000517:prevention & control; D003031:Coal; D003300:Copper / Q000737:chemistry*; D006358:Hot Temperature; D008345:Manganese / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry*; D013455:Sulfur / Q000737:chemistry*
chemical_list: D000393:Air Pollutants; D003031:Coal; C509969:SBA-15; D008345:Manganese; D013455:Sulfur; D012822:Silicon Dioxide; D003300:Copper