甲醇制烯烃催化剂SAPO-34分子筛的制备和喷雾成型  

Preparation of SAPO-34 molecular sieve and spray drying of SAPO-34 catalyst used for methanol-to-olefin process

作　　者：张奇[1] 王涯 陈胜利[1] 高玉李[1] 蒋永杰 

机构地区：[1]中国石油大学(北京)重质油国家重点实验室,北京102249

出　　处：《工业催化》2014年第10期775-779,共5页Industrial Catalysis

摘　　要：SAPO-34分子筛用于催化甲醇转化制烯烃,乙烯和丙烯选择性高,是很好的甲醇制烯烃催化剂。由于SAPO-34分子筛失活速率快,甲醇制烯烃反应器通常是连续循环再生的流化床反应器,SAPO-34分子筛必须喷雾成型并达到一定抗磨强度后才能使用。在50 L反应釜合成了SAPO-34分子筛,并在中试喷雾装置上,以SAPO-34为活性组分喷雾成型甲醇制烯烃催化剂。结果表明,喷雾成型甲醇制烯烃催化剂的抗磨损指数为1.58%·h-1,抗磨性能达到工业应用要求,与两种工业甲醇制烯烃催化剂对比,喷雾成型甲醇制烯烃催化剂寿命最长,达260 min,乙烯、丙烯选择性以及乙烯+丙烯总选择性在对应的各个反应时间点均最高,260 min分别达到49.09%、35.05%和84.98%。SAPO-34 molecular sieve is the good catalyst for methanol to olefins （MTO） process with high selectivity to ethylene and propylene. Because of the high deactivation rate of SAPO-34 caused by coke deposition on the catalyst, the MTO process usually adopts a continuous recycling fluidized bed to make continuous regeneration of the catalysts. Therefore, SAPO-34 molecular sieve catalysts should be formed by spray drying process to reach high attrition resistance. SAPO-34 molecular sieve was synthesized in a 50 L reactor. Using SAPO-34 molecular sieve as the active component, the attrition-resistant MTO catalyst was prepared by the spray drying process in a pilot scale unit. The results indicated that the as-propared MTO catalyst with the attrition index of 1.58% · h-1 met the requirement for the catalyst attrition-resistance of commercial application. Compared with two commercial MTO catalysts, the self-made MTO catalyst possessed the longest service life which reached 260 rain, and its selectivity to ethylene, propylene and ethylene ＋ propylene was the highest at each time point,which were 49. 09%,35. 05% and 84.98% , respectively, after reaction for 260 min.

关 键 词：催化剂工程 甲醇制烯烃 SAPO-34分子筛 喷雾成型 抗磨指数 

分 类 号：TQ426.6[化学工程] O643.36[理学—物理化学]