石油化工2026，Vol.55Issue(5)：675-681,7.DOI:10.3969/j.issn.1000-8144.2026.05.004
P/Ce复合改性ZSM-5催化剂的制备及其对重烃催化裂解的反应性能
Preparation of P/Ce composite modified ZSM-5 catalysts and their activity in catalytic cracking of heavy hydrocarbons
摘要
Abstract
With spent catalyst discharged from a catalytic cracking unit as raw material,an ammonium salt mixing-calcination-hydrothermal slurrying method was adopted to remove Fe and Ni from the spent catalyst,thereby effectively enriching ZSM-5 zeolite.The obtained ZSM-5 zeolite further underwent phosphorus and cerium composite modification to prepare P/Ce composite modified ZSM-5 catalysts.The crystal structure,elemental composition,textural properties,and surface acidity of the catalysts were characterized by XRD,XRF,N2 adsorption-desorption,Py-FTIR,and NH3-TPD.With Yulin atmospheric residue as the feedstock,the activity of P/Ce composite modified ZSM-5 catalysts(Z-1-Z-5)with different Ce loadings in catalytic cracking was evaluated in a fixed-bed microreactor.The experimental results show that P/Ce composite modification does not destroy the MFI framework structure of ZSM-5 zeolite,and mainly regulates the mesoporous structure of the catalyst.The introduction of Ce can significantly increase the amount of Lewis acid sites and optimize the surface acidity.The Z-4 catalyst with a Ce loading of 0.220%(w)exhibits strong heavy hydrocarbon conversion ability(conversion of 91.3%),high ethylene and propylene yield(28.01%),and low coke yield(7.70%),showing excellent catalytic activity.关键词
ZSM-5分子筛/P/Ce复合改性/重烃催化裂解/酸性/双烯收率Key words
ZSM-5 zeolite/P/Ce composite modification/heavy hydrocarbon catalytic cracking/acidity/ethylene and propylene yield分类
化学化工引用本文复制引用
张小琴,韩磊,牛鑫,刘树伟,杨原涛,李鹏哲..P/Ce复合改性ZSM-5催化剂的制备及其对重烃催化裂解的反应性能[J].石油化工,2026,55(5):675-681,7.基金项目
陕西延长石油(集团)有限责任公司资助项目(ycsy2021sfzs-A-01). （集团）
