摘要
甲醇制低碳烯烃(MTO)反应以具有八元环孔道性质的小孔分子筛SAPO-34为催化剂,具有高活性和乙烯、丙烯选择性高的特点.但催化剂稳定性较差,易失活,须对其进行循环再生.MTO催化剂的失活主要是由积炭导致,现采用一系列表征手段(TG、N_2吸附、NH_3-TPD、FT-IR、SEM以及原位XRD)对不同反应温度和反应阶段失活的SAPO-34催化剂的积炭量、积炭位置、积炭物种以及理化性质进行了表征和分析,并研究了催化剂的再生性能.
The high methanol conversion and olefin selectivity in methanol-to-olefin（MTO） reaction can be obtained on SAPO-34 catalyst due to its appropriate pore size and acidity. However, the catalyst deactivates rapidly by coking. Therefore, it is of great significance to investigate the coking and regeneration behavior of the catalyst. Several characterization techniques including TG, N2 adsorption, NH3-TPD, FT-IR, SEM and in situ XRD are utilized to study the coke properties, coke locations and coke species by analyzing the physico-chemical properties of the deactivated catalysts obtained at different reaction temperatures and periods. Research on the catalyst regeneration is also carried out.
出处
《复旦学报（自然科学版）》
CAS
CSCD
北大核心
2012年第5期566-573,共8页
Journal of Fudan University：Natural Science
