核壳质量比对β@SBA-15复合分子筛加氢裂化性能的影响  

Effect of mass ratio of shell to core on hydrocracking performance ofβ@SBA-15 composite zeolite

作　　者：于政敏 陈玉晶 于涛[1] 孙晓艳[1] 樊宏飞 YU Zheng-min;CHEN Yu-jing;YU Tao;SUN Xiao-yan;FAN Hong-fei(Dalian Research Institute of Petroleum and Petrochemicals,SINOPEC,Dalian 116045,China)

机构地区：[1]中国石化(大连)石油化工研究院有限公司,辽宁大连116045

出　　处：《石化技术与应用》2024年第4期247-251,共5页Petrochemical Technology & Application

基　　金：国家自然科学基金资助项目(项目编号:22088101)。

摘　　要：制备一系列不同核壳质量比(以下简称核壳比)的β@SBA-15复合分子筛,并对复合分子筛壳层材料进行酸性位的构建,以构建酸性位后的β@AlSBA-15复合分子筛为主要裂化组分制备催化剂,考察复合分子筛核壳比对催化剂加氢裂化性能的影响,并在200 mL固定床反应装置上对催化剂进行性能评价。结果表明:β@SBA-15复合分子筛的最佳核壳比为6∶4,高核壳比合成的复合分子筛核壳结构不完整,低核壳比会导致合成的复合分子筛分相严重。以中东减压蜡油为原料,在相近转化率条件下,当核壳比为6∶4时,催化剂的加氢裂化性能最优,中间馏分油选择性最高(84.9%),航空煤油馏分冰点和柴油馏分凝点最低,分别为-61,-5℃。A series ofβ@SBA-15 composite zeolites with different mass ratio of shell to core(hereinafter referred to as core-shell ratio)were prepared,and the acidic sites were constructed in the shell material.After acidic sites were constructed,β@AlSBA-15 composite zeolite was used as the main cracking component to prepare catalyst,and the effect of the core-shell ratio of the composite zeolite on the hydrocracking performance of the catalyst was investigated on 200 mL fixed bed reactor.The results showed that the optimal core-shell ratio for composite zeolite was 6∶4.A high core-shell ratio could result in incomplete core-shell structure,while a low core-shell ratio could lead to separated phase.Under similar conversion rate conditions with Middle East vacuum gas oil as raw material,theβ@SBA-15 composite zeolite with a core-shell ratio of 6∶4 showed the best hydrocracking performance,the highest selectivity to middle distillate oil(84.9%),the lowest freezing point of jet oil and the lowest freezing point of diesel at-61℃and-5℃respectively.

关 键 词：Β分子筛 SBA-15分子筛 核壳结构 加氢裂化 

分 类 号：TQ426.95[化学工程]