Abstract: There are mainly two kinds of catalysts for first-stage hydrogenation of pyrolysis gasoline at home – Pd-based catalyst and Nibased catalyst. In recent years, the properties of pyrolysis gasoline from some of refineries became complicated, varied and high in impurity content, leading to inadequate adaptability of Pd-based catalysts. Ni-based catalyst is strongly adaptable for feed and superior in price. Therefore, Ni-based catalyst has become the first option for newly-constructed ethylene manufacturers in recent years. The domestic market share is on the rise. PetroChina Lanzhou Petrochemical Research Center has successfully developed LY-2008 – a Ni-based catalyst for first-stage hydrogenation of pyrolysis gasoline, which uses the additive to improve dispersion and reduction functions of active components. LY-2008 has completed ex-situ passivation, shortened the construction period by 60 percent and increased selectivity by three to six percentages. The LY-2008 catalyst is characterized for low-temperature hydrogenation, high hydrogenation selectivity and stability and strong resistant ability against sulfur and arsenic. It can be widely used for first-stage hydrogenation of C5 -C8, C6 -C7, C6 -C8, and C5 -C9 fractions. LY-2008 is as good as its foreign counterpart in terms of performance and has a promising prospect for wide application.

Key words: pyrolysis gasoline, hydrogenation, Nickel-based catalyst

摘要： 裂解汽油一段加氢的主要目的是将其中的双烯烃与链烯基芳烃选择性加氢转化为单烯烃和烷基芳烃, 目 前一段加氢催化剂主要有贵金属钯基催化剂和非贵金属镍基催化剂两种。近年来裂解汽油中硫、砷、水等杂质含量明 显升高, 传统的钯基催化剂抗杂质能力明显不足。镍基催化剂对原料适应性强, 价格优势明显, 成为新建大型乙烯厂 家的首选, 国内市场占有率不断提升。中国石油兰州化工研究中心成功研制的裂解汽油一段加氢镍基催化剂LY-2008, 实现催化剂器外钝化, 开工周期缩短60%, 选择性提高3~6 个百分点。LY-2008 催化剂适用于C5—C8、C6—C7、C6— C8、C5—C9 馏分的一段加氢, 具有低温加氢活性好、加氢选择性和稳定性高、抗硫和砷等毒物能力强等特点, 催化剂 开工平稳且快速, 性能达到进口催化剂水平, 拥有较好的推广前景。

关键词: 裂解汽油; 加氢; 镍基催化剂