纳米金刚石负载铜基催化剂在炔类选择加氢中的应用

Application of Nano Diamond Loaded Copper Based Catalyst in Selective Hydrogenation of Alkynes

苯乙烯是多种合成橡胶以及聚苯乙稀等高分子材料的原料。在生产实际中,苯乙烯单体中不可避免地含有苯乙炔。然而,苯乙炔的存在会增加苯乙烯反应时催化剂的用量,同时对聚合速度和产物链长也有影响。因此,通过选择性加氢将苯乙烯单体中的苯乙炔去除,是十分必要的。利用浸渍法制备了低载量的纳米金刚石负载铜基催化剂Cu_(0.5%)/ND,以及相同低载量的经前处理纳米金刚石负载铜基催化剂Cu_(0.5%)/p-ND来去除苯乙烯中的苯乙炔,并通过XRD对催化剂进行了表征。证明纳米金刚石经前处理形成的结构与铜共同作用,提高了催化剂的性能。

Styrene is a raw material for various synthetic rubbers and polymer materials such as polystyrene.In practical production,styrene monomer inevitably contains phenylacetylene.However,the presence of phenylacetylene increases the amount of catalyst used in the styrene reaction,while also affecting the polymerization rate and product chain length.Therefore,it is necessary to remove phenylacetylene from styrene monomer through selective hydrogenation.Low loading nano diamond supported copper based catalysts Cu_(0.5%)/ND and pre treated nano diamond supported copper based catalysts Cu_(0.5%)/p-ND with the same low loading were prepared by impregnation method to remove phenylacetylene from styrene,and the catalysts were characterized by XRD.It is proved that the structure formed by pre-treatment of nanodiamonds works together with copper to improve the performance of the catalyst.