The hydrocracking reaction rules of tetralins and naphthalenes mixture on Ni-Mo catalyst containing HY zeolite were investigated using two series of feeds: feed I with constant tetralin content and various alky-naphthalene contents, feed Ⅱ with similar total aromatic hydrocarbon content and various tetralins to naphthalenes ratios. The conversion and selectivity of hydrocarbons took part in reactions were calculated from the detailed product analyst. Results showed that for feed I the conversion of naphthalenes decreased with the increase of naphthalene content, the selectivity of tetralins ring opening to form alky-benzene was not affected significantly in this case, yet it was suppressed obviously in feed II case with the increase of methyl-naphthalene content. Due to the occupation of hydrogenation sites and acid sites by the adsorption of polycyclic aromatic hydrocarbons, the hydrogenation and isomeriza-tion of tetralins were suppressed, especially for isomerization ring opening reactions.%在含HY分子筛的NiMo加氢裂化催化剂上,采用四氢萘类化合物(简称四氢萘类)及萘类化合物(简称萘类)含量不同的混合物为原料,考察四氢萘类与萘类的混合加氢裂化反应规律,并通过裂化产物中烃类物质的组成计算反应的转化率和选择性.结果表明:在四氢萘类含量相同、萘类含量增大的情况下,萘类转化率下降,四氢萘类开环生成烷基苯的选择性变化不大；在芳烃总量相当、甲基萘比例增大时,对四氢萘类异构开环生成烷基苯的抑制作用较明显.由于多环芳烃在催化剂表面的吸附系数较大,同时占据催化剂的加氢及酸性中心,抑制了四氢萘类的进一步加氢及异构反应,且异构开环反应受影响程度较大.
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