论文部分内容阅读
1.前言 采用具有ZSM-5,ZSM-11和ZSM-48沸石结构的高硅沸石作为CO加氢反应的催化剂载体,有效地控制了产物分布范围。AlPO_4-5分子筛的孔道结构和表面性质决定了它同样可作为催化剂载体以代替沸石。关于AlPO_4-n分子筛的研究,目前多着重于合成和结构方面,以其作为催化剂和催化剂载体的报道较少。由于AlPO_4-n分子筛无离子交换性,致使负载金属AlPO_4-n催化剂的制备受到限制。根据“某些盐类或氧化物与高比表面载体混合,在低于熔点的适当温度下焙烧,这些盐类或氧化物在载体表面能自发分散”的原理,本文采用固相焙烧法制备了系列Fe_2O_3/AlPO_4-5催化剂并用于CO加氢反应,研究铁活性组分在AlPO_4-5分子筛表面的分散状况及催化活性。
1. Introduction The use of zeolites with ZSM-5, ZSM-11 and ZSM-48 zeolite structures as catalyst supports for the CO hydrogenation reaction effectively controls the product distribution range. The pore structure and surface properties of AlPO 4 -5 molecular sieves determine that it can also act as a catalyst support instead of zeolite. At present, the research on AlPO 4-n molecular sieve focuses more on the synthesis and structure, with less reports on it as a catalyst and catalyst support. Due to the non-ion exchangeability of AlPO 4-n zeolites, the preparation of metal-supported AlPO 4 -n catalysts is limited. Based on the principle that “certain salts or oxides are mixed with a high specific surface carrier and calcined at an appropriate temperature below the melting point and these salts or oxides spontaneously disperse on the surface of the carrier,” the solid phase roasting method was used to prepare Series of Fe_2O_3 / AlPO_4-5 catalysts for CO hydrogenation reaction to study the dispersion of iron active components on the surface of AlPO_4-5 zeolite and its catalytic activity.