微波辅助一步法合成Pd-MCM-41及其催化性能测试

Microwave-Assisted Synthesis of Pd-MCM-41 in One Step and Its Catalytic Properties

以介孔分子筛MCM-41作为催化剂的载体,采用微波辅助方法一步合成2种不同n(Pd)/n(Si)的负载型催化剂Pd-MCM-41,采用XRD、FT-IR及N2吸附-脱附对Pd-MCM-41进行表征,并将其应用于催化低浓度甲酸分解反应,考察在常规加热和微波加热条件下,Pd负载量、反应温度和反应时间对甲酸在Pd-MCM-41上分解反应的影响。结果表明,微波辅助成功地合成了Pd-MCM-41催化剂,其对低浓度甲酸分解反应有一定的催化效果;提高反应温度和延长反应时间,均有利于低浓度甲酸分解;与常规加热条件相比,在微波加热条件下Pd-MCM-41对甲酸分解反应的催化效果更好。

Two Pd catalysts with different molar ratios of Pd and Si（n（Pd）/n（Si）） supported on mesoporous molecular sieve MCM-41 were synthesized in one step method assisted by microwave,and characterized by means of XRD,FT-IR and N2 adsorption-desorption.The two Pd-MCM-41 were applied to decomposition reaction of formic acid at low concentration under conventional heating and microwave heating conditions.The influences of Pd loading,reaction temperature and reaction time on the catalytic efficiency of Pd-MCM-41 for formic acid decomposition reaction were studied.The experiment results demonstrated that the Pd-MCM-41 catalyst was successfully synthesized by microwave-assisted method,which had certain catalytic effect on decomposition reaction of formic acid at low concentration.To raise the reaction temperature and to prolong the reaction time both were benefit to decomposition of formic acid.Compared with the formic acid decomposition reaction under conventional heating condition,Pd-MCM-41 had higher catalytic efficiency for the reaction under microwave heating condition.