催化裂化条件下噻吩在氧化钒上的反应机理研究  

REACTION MECHANISM OF THIOPHENE ON VANADIUM OXIDES UNDER FCC CONDITIONS

作　　者：王鹏[1] 郑爱国[1] 田辉平[1] 龙军[1] 

机构地区：[1]中国石油化工股份有限公司石油化工科学研究院,北京100083

出　　处：《石油炼制与化工》2005年第7期41-45,共5页Petroleum Processing and Petrochemicals

基　　金：国家重点基础研究基金资助项目(G2000048001)

摘　　要：利用噻吩原位吸附红外光谱、常压连续固定床反应等研究手段,结合吡啶吸附程序升温脱附红外光谱、XPS光电子能谱等表征手段对噻吩与五氧化二钒的反应机理进行了初步研究。研究发现:500℃下,噻吩能够与V2O5发生氧化还原反应,噻吩被氧化成CO、CO2以及SO2,转化率可达到41.2%,同时V2O5的氧化数下降。V2O5表面存在少量B酸中心,这一特征使噻吩的反应产物中H2S的产率增加。The reaction mechanism of thiophene on vanadium oxides under FCC conditions were studied using thiophene in-situ FT-IR analysis and atmospheric pressure continuous fixed bed reaction, following characterization by pyridine adsorption-temperature programmed desorption FT-IR and XPS spectrum. The test results showed that redox reaction occurred between thiophene and V2O5 at 500℃; thiophene was converted to CO, CO2 and SO2 and the conversion reached 41.2%; at the same time the oxidation number of vanadium decreased. The existence of a few Bronst acid sites on V2O5 enhanced the formation of H2S in the reaction of thiophene with V2O5.

关 键 词：催化裂化 汽油料 脱硫 噻吩 氧化钒 反应机理 机理研究 程序升温脱附 氧化还原反应 V2O5 

分 类 号：O643.32[理学—物理化学]