【摘 要】
：
The gas-phase dehydration of glycerol was conducted over HPW/MCM-41 catalysts, which were prepared by impregnation of different amount of H3PW12O40 (HPW) on the MCM-41 support. The samples were characterized by XRD, N2 physisorption, FTIR, NH3-TPD, and py
【机 构】
：
Collaborative Innovation Center for Ecological Building Materials and Environmental Protection Equip
【出 处】
：
武汉理工大学学报（材料科学版）（英文版）
论文部分内容阅读
The gas-phase dehydration of glycerol was conducted over HPW/MCM-41 catalysts, which were prepared by impregnation of different amount of H3PW12O40 (HPW) on the MCM-41 support. The samples were characterized by XRD, N2 physisorption, FTIR, NH3-TPD, and pyridine-FTIR measurements. N2 physisorption results suggested that the uniform framework of MCM-41 could still be well maintained after modified with HPW. Pyridine-FTIR experiments indicate that HPW modified MCM-41 can generate rich Br?nsted acid sites. Moreover, Br?nsted acid sites facilitated to improve acrolein selectivity. Under the optimized reaction conditions: 40wt% HPW loading, 20% glycerol concentration, and 320 ℃ reaction temperature, the glycerol conversion and acrolein selectivity reach 85% and 80%, respectively.
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