醇水体积比对Cu-HMS介孔分子筛结构及PdCl_2/Cu-HMS催化性能的影响

Effect of Ethanol/water Volume Ratio on Pore Structure for Cu-HMS Mesoporous Molecular Sieve and Catalytic Performance for PdCl_2/Cu-HMS

通过改变EtOH/H2O体积比,制备了5个不同粒径和比表面积的Cu-HMS分子筛。采用红外、XRD、SEM和BET进行表征,研究不同乙醇/水体积比对Cu-HMS结构和表面形貌的影响。不同粒径的Cu-HMS与活性组分PdCl2结合制成氧化羰基合成碳酸二乙酯(DEC)的催化剂,选择性均达到100%。EtOH/H2O体积比为1.0的Cu-HMS分子筛的比表面积可达1 520.36 m2/g,DEC的时空收率达到110.3 g/(L·h)。

Five copper-containing hexagonal mesoporous molecular sieves（Cu-HMS） with different particle sizes and specific surface areas were synthesized by adjusting ethanol/water volume ratio of the synthetic system.The effects of ethanol/water volume ratio on the structure and surface morphology were characterized by means of infrared resonance（IR） spectroscopy,X-ray powder diffraction（XRD）,scanning electron microscopy（SEM） and N2 adsorption-desorption.The selectivity of all the PdCl2/Cu-HMS catalysts reached 100% by oxidative carbonylation of ethanol in the gas-phase reaction.When ethanol/water volume ratio was about 1.0,the specific surface areas of Cu-HMS reached 1 520.36 m^2/g,and space time yield of DEC was 110.3 g/（L·h）.