催化丁烯裂解高选择性生成丙烯的SAPO-18的合成(英文)  

Synthesis of SAPO-18 for High Propylene Selectivity in 1-Butene Catalytic Cracking

作　　者：胡云峰[1] 吕忠媛 苏寻明 李兆飞 阎立军 

机构地区：[1]东北石油大学化学化工学院,黑龙江大庆163318 [2]中国石油石油化工研究院,北京100195

出　　处：《石油学报（石油加工）》2017年第1期150-156,共7页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：中国石油科技创新基金研究项目(2012D-5006-0403);中国石油天然气集团公司科技开发项目(2014A-2610)资助

摘　　要：合成了不同n(Si)/n(Si+Al+P)的SAPO-18分子筛,并将其应用于催化丁烯裂解反应中;同时采用XRD、SEM、XRF、TG和NH_3-TPD技术对其进行表征,以考察如何通过改变凝胶混合物中的Si含量来提高其在催化丁烯裂解反应中的丙烯选择性。结果表明,与ZSM-5分子筛相比,n(Si)/n(Si+Al+P)为0.036的SAPO-18能获得较高的低碳烯烃选择性。在反应初期(TOS=3min),丁烯转化率达到71.6%,丙烯选择性可以达到54.2%。这主要归因于SAPO-18具有独特的八元环结构以及适宜的酸性。SAPO-18 samples with different n（Si）/n（Si＋Al＋P）were synthesized and characterized by XRD,SEM,XRF,TG and NH_3-TPD techniques and used to catalyze 1-butene cracking in order to explore how to maximize propylene selectivity by changing the Si content in the gel mixture.The selectivity to light olefins obtained in 1-butene cracking catalyzed by SAPO-18 with n（Si）/n（Si＋Al＋P）of 0.036 was higher than that catalyzed by ZSM-5.In the initial reaction（TOS=3 min）,the butene conversion rate could reach 71.6% and the propylene selectivity could reach 54.2%.The catalytic effect of SAPO-18 was mainly due to unique eight-membered ring structure and appropriate acidity.

关 键 词：SAPO-18 1-丁烯裂解 丙烯 SI含量 

分 类 号：O643[理学—物理化学]