催化裂化待生剂上有机吸附物种的鉴别分析  

Identification of the Organic Adsorptive Species on Fluid-bed Catalytic Cracking Coking Catalysts

作　　者：张雪静[1] 卢立军[1] 徐广通[1] 

机构地区：[1]石油化工科学研究院,北京100083

出　　处：《分析化学》2006年第U09期199-202,共4页Chinese Journal of Analytical Chemistry

基　　金：中国石化股份公司资助课题(No.104051)

摘　　要：为了鉴别分析催化裂化待生剂上分子筛孔道内、外的有机吸附物种,提出了超声萃取提取待生剂上外表面的有机吸附物种方法,优化了萃取条件;对分子筛孔道内的有机吸附物种,采用HF处理待生剂,溶解催化剂分子筛骨架以释放孔内积炭,并用二氯甲烷作溶剂萃取。采用GC-MS分离并鉴别分子筛孔道内、外的有机吸附物种,实验结果显示:在催化剂外表面主要是二环和三环芳烃,而在分子筛孔道内解吸的则是从双环到七元环的多环芳烃。这些结果对研究催化裂化催化剂的性能和结炭的机理提供了重要信息。A method was developed and optimized to extract and identify the organic compounds deposited on fluid-bed catalytic cracking（FCC） spent catalysts. The method consisted that the ultrasonic extraction technique was used to extract the external surface species of zeolite pores, and for internal deposited species in zeolite pores, 40% HF acid was used to dissolve the coking catalysts to release internal coke; then CH2Cl2 was used to extract organic compounds adsorption in coke. The species and structures of organic compounds deposited in catalyst were analyzed and identified by gas chromatography/mass spectrometry. The results indicate that the adsorptions on external surface mainly are aromatics （2 - 3 rings）, while the adsorptions in the pore of zeolite are polycyclic aromatic hydrocarbons （2 - 7 rings）. It provides important information for the study on FCC catalysts and the mechanism of coking on catalysts.

关 键 词：催化裂化催化剂 气相色谱-质谱 有机吸附物 多环芳烃 

分 类 号：TE624.8[石油与天然气工程—油气加工工程]