新型介孔分子筛KIT-1加氢脱硫催化剂的研究

Study on Disordered Mesoporous KIT-1 Supported Hydrodesulfurization Catalysts

制备了新型的结构排列无序的介孔分子筛KIT-1和负载Ni,Mo的KIT-1加氢脱硫催化剂.实验结果表明MoO_3较易分散在KIT-1的表面,而NiO则容易在其表面形成小晶粒.与以MCM-41和NaY分子筛为载体的Ni,Mo催化剂相比,KIT-1负载催化剂具有较高的加氢脱硫催化活性,因为KIT-1载体具有相互交错的三维孔道结构,有利于反应物和产物的扩散,而不容易受孔道堵塞的影响.

MoO3 and NiO were supported on KIT - 1, a new disordered mesoporous molecular sieve. MoO3 is homogeneously dispersed as a monolayer on the support, whereas NiO tends to form small crystallites in the mesoporous channels. KIT - 1 supported MoO3 and/or NiO catalysts exhibit higher catalytic activities for thiophene hydrodesulfurization than similar MCM - 41 and NaY zeolite supported catalysts, because the three dimensional disordered network of short channels in KIT - 1 reduces the risk of blockage in the catalysts and facilitates the transport of reactant and product molecules.