催化学报

催化学报 ›› 2008, Vol. 29 ›› Issue (9): 940-944.

• 研究论文 • 上一篇    下一篇

ZSM-5/MOR复合分子筛催化剂对混合C4烃转化反应的催化性能

刘百军1,2,曾贤君1,何琳琳1,赵震2   

  1. 1 中国石油大学(北京)CNPC催化重点实验室, 北京 102249; 2 中国石油大学(北京)重质油国家重点实验室, 北京 102249
  • 收稿日期:2008-09-25 出版日期:2008-09-25 发布日期:2012-07-19

Catalytic Performance of ZSM-5/MOR Composite Zeolite Catalyst for Conversion of Mixed C4 Hydrocarbons

LIU Baijun1,2*, ZENG Xianjun1, HE Linlin1, ZHAO Zhen2   

  1. 1 Key Laboratory of Catalysis, China National Petroleum Corporation, China University of Petroleum, Beijing 102249, China; 2 State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
  • Received:2008-09-25 Online:2008-09-25 Published:2012-07-19

PDF

962

被引次数

22

摘要： 以ZSM-5/丝光沸石(MOR)复合分子筛为催化剂,对混合C4烃的催化转化反应进行了评价,并采用程序升温脱附和原位红外光谱技术对ZSM-5/MOR的酸性进行了表征. 结果表明,与ZSM-5相比, MOR具有很低的催化活性,但ZSM-5/MOR复合分子筛具有较高的催化活性,随着ZSM-5/MOR复合分子筛中ZSM-5含量的增加, C4烃转化率稍有升高; 在C4烃转化率大致相同的情况下,乙烯和丙烯的总选择性比较接近,但苯和甲苯的总收率却快速升高. 随着ZSM-5/MOR复合分子筛中ZSM-5含量的增加,弱酸和中强酸的酸量逐渐减少,强酸的酸量有所增加. 由于ZSM-5/MOR复合分子筛中MOR对ZSM-5起到分散作用而产生更多的L酸中心,且此L酸中心处于分子筛的外表面而具有较高的能量,导致苯和甲苯的总收率升高.

关键词: ZSM-5分子筛, 丝光沸石, 复合分子筛, 混合碳四烃, 乙烯, 丙烯, 芳构化, 苯, 甲苯

Abstract: Not only did the ZSM-5/mordenite (ZSM-5/MOR) composite zeolite catalyst give h igh activity for the conversion of mixed C4 hydrocarbons, but also it possesse d high selectivities to ethylene and propylene, to benzene and toluene. The yiel d sum of benzene and toluene increased with the content of ZSM-5, and even it w as much greater than that over bare ZSM-5 zeolite. At the reaction temperature of 625 ℃ the yield sum of benzene and toluene could reach as high as 44.5%.

Key words: ZSM-5 zeolite, mordenite, composite zeolite, mixed C4 hydrocarbon, ethylene, propylene, aromatization, benzene, toluene