运用EXAFS技术对Ni和W负载于 4种改性Y分子筛与Al2 O3 混合载体上的加氢裂解催化剂进行了研究 ,结果表明 ,硫化态催化剂中W和Ni均未被完全硫化 ,除硫化态外 ,大部分W处于钨氧硫 (WOS)状态 ,而部分Ni为氧化物 ,不同分子筛对Ni和W的硫化程度的影响不同 .另外催化剂中存在少量的NiWS相 ,载体的B酸位与催化剂中的NiWS相的多少有较好的相关性 The EXAFS technology was used to study the hydrocracking catalysts of Ni and W supported on four modified Y zeolites and Al2 O3 mixed carriers. The results show that both W and Ni are not completely sulfided in the sulfided catalyst, , Most of W is in WOS and some of Ni is oxide, and the effect of different molecular sieves on the degree of sulfidation of Ni and W is different.In addition, a small amount of NiWS phase is present in the catalyst, NiWS phase of the number of better correlation