加氢裂化尾油在不同结构催化剂上催化裂解制烯烃研究  

RESEARCH ON DEEP CATALYTIC CRACKING OF HYDROCRACKER TAIL OIL TO OLEFIN

作　　者：李凤岭 周微 孙志国 王嘉辰 杨晓宇 Li Fengling;Zhou Wei;Sun Zhiguo;Wang Jiachen;Yang Xiaoyu(PetroChina Dalian Petrochemical Company,Dalian,Liaoning 116032;CNOOC Tianjin Chemical Research and Design Institute Co.,Ltd.;Petrochemical Research Institute,PetroChina;Department of Catalytic Chemistry and Engineering&State Key Laboratory of Fine Chemicals,Dalian University of Technology)

机构地区：[1]中国石油大连石化分公司,辽宁大连116032 [2]中海油天津化工研究设计院有限公司 [3]中国石油石油化工研究院 [4]大连理工大学化工与环境生命学部精细化工国家重点实验室

出　　处：《石油炼制与化工》2023年第9期84-92,共9页Petroleum Processing and Petrochemicals

基　　金：中国石油天然气股份有限公司规划总院科学研究与技术开发项目(KJ2023-005);中海油能源发展股份有限公司合同项目(HFZDZX-JN2021-02-04)。

摘　　要：为了明确分子筛孔道结构与酸性质对加氢裂化尾油催化裂解制备低碳烯烃的构效关系,寻找最优催化剂,实现加氢裂化尾油的高效转化,挑选了BEA,FER,TON,FAU,AEL,AFI,MFI等7种拓扑结构的分子筛,考察了加氢裂化尾油在不同孔道结构分子筛上的催化裂解反应性能,并通过以正己烷为探针的脉冲微反试验进一步分析了分子筛酸性对催化裂解反应过程中尾油反应性能及低碳烯烃产物分布的影响。加氢裂化尾油的催化裂解试验结果表明,反应转化率受孔径大小与孔道结构共同作用,具有尺寸为0.40 nm×0.65 nm的椭圆形一维孔道结构的SAPO-11分子筛为催化裂解反应最优催化剂。脉冲微反试验结果表明:分子筛弱酸酸量及中强酸酸量越大,越有利于目的产物乙烯和丙烯生成。In order to find out the structure-activity relationship of the pore structure of molecular sieve and acidity on deep catalytic cracking of hydrocracker tail oil to produce light olefin,and to find the optimal catalyst for the efficient conversion of hydrocracker tail oil,seven kinds of molecular sieves with different topological structures,such as BEA,FER,TON,FAU,AEL,AFI,MFI,were selected to investigate the deep catalytic cracking performance of hydrocracker tail oil on molecular sieves with different pore structures.The effects of acidity of molecular sieve on the reaction performance and the distribution of light olefin products were further analyzed by micro-pulsed reaction using n-hexane as probe.The deep catalytic cracking test of hydrocracker tail oil showed that the conversion rate was affected by both pore size and structure,SAPO-11 molecular sieve with one-dimensional elliptical pore structure of 0.40 nm×0.65 nm was the best catalyst for deep catalytic cracking reaction,and the higher the amount of weak acid and medium-strong acid in molecular sieve,the more beneficial to the formation of ethylene and propylene.

关 键 词：催化裂解 加氢裂化尾油 分子筛 低碳烯烃 脉冲微反装置 

分 类 号：TE624.41[石油与天然气工程—油气加工工程]