研究了不同载体负载的Pd催化剂Pd/MCM-41、Pd/Al₂O₃、Pd/MC和Pd/C在聚苯乙烯(PS)加氢制聚环己烷基乙烯(PCHE)中的性能。考察了催化剂质量、搅拌速度、反应温度、反应时间及反应压力等对PS加氢反应的影响。结果表明,具有较高分散度的Pd/C催化剂表现出优异的催化活性和稳定性。在催化剂质量为0.1 g和较低的反应温度(160℃)下,Pd/C催化PS加氢的转化率>99%,且产物PCHE具有较高的玻璃化转变温度、较低的密度和吸水性及较高的抗拉强度。

The performances of Pd catalysts with different supports,including Pd/MCM-41,Pd/Al₂O₃,Pd/MC and Pd/C,in the hydrogenation of polystyrene to polycyclohexyl ethylene (PCHE) are evaluated.Meanwhile,the effects of catalyst dosage,stirring speed,reaction temperature,reaction time and reaction pressure on the hydrogenation are investigated.It is shown by results that the Pd/C catalyst with higher Pd dispersion exhibits excellent catalytic activity and stability.Under lower catalyst dosage (0.1 g) and reaction temperature (160℃),the conversion of polystyrene over Pd/C exceeds 99%.In addition,the produced PCHE has a high glass transition temperature,low density and water absorption,as well as high tensile strength.

钱俊峰(1980-),男,博士,副研究员,研究方向为精细石油化工及清洁化生产工艺、工业催化及化工分离,qianjunfeng@cczu.edu.cn