催化学报

催化学报 ›› 2007, Vol. 28 ›› Issue (6): 567-571.

• 研究论文 • 上一篇    下一篇

丁烯在纳米H-ZSM-5催化剂上的催化裂解反应

李福芬,贾文浩,陈黎行,郭洪臣   

  1. 大连理工大学化工学院催化化学与工程系及精细化工国家重点实验室, 辽宁大连 116012
  • 收稿日期:2007-06-25 出版日期:2007-06-25 发布日期:2011-05-28

Catalytic Cracking of Butene over Nano-Sized H-ZSM-5 Catalyst

LI Fufen, JIA Wenhao, CHEN Lixing, GUO Hongchen*   

  1. Department of Catalytic Chemistry and Engineering; State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116012, Liaoning, China
  • Received:2007-06-25 Online:2007-06-25 Published:2011-05-28

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910

被引次数

112

摘要： 在小型固定床反应器中考察了纳米H-ZSM-5催化剂(晶粒度为20～50 nm)对丁烯催化裂解制丙烯反应的催化性能,并与两种微米H-ZSM-5催化剂样品(晶粒度分别为1～2和1～6 μm)进行了比较. 结果表明,在相同的反应条件下,纳米H-ZSM-5和微米H-ZSM-5催化剂上的初始丁烯转化率及丙烯收率相当,但纳米H-ZSM-5催化剂在反应中的抗积碳失活性能优于微米H-ZSM-5催化剂. 在进料质量空速7 h-1, 常压和560 ℃的条件下反应,当丁烯转化率和丙烯收率下降50%时,两种微米催化剂上的反应时间仅为28 h左右,而纳米催化剂上的反应时间为120 h左右. 积碳分析结果表明,纳米催化剂上的积碳速率明显低于微米催化剂.

关键词: ZSM-5沸石, 纳米沸石, 微米沸石, 丁烯, 催化裂解, 丙烯

Abstract: In a small continuous flowing fixed-bed reactor, the nano-sized H-ZSM-5 catalyst with crystal size of20-50nm was applied to the catalytic cracking of butene from liquefied petroleum gas for propene synthesis. The catalytic performance of the nano-sized H-ZSM-5 catalyst was compared with that of two micro-sized H-ZSM-5 samples with crystal size of1-2and1-6μm, respectively. Under the same reaction conditions, the nano-sized H-ZSM-5 and the micro-sized H-ZSM-5 samples had approximately the same initial butene conversion and propene yield. However, the nano-sized H-ZSM-5 sample exhibited better resistance to coking and deactivation. Under the reaction conditions of WHSV=7 h-1, p=0.1 MPa, and θ=560 ℃, the butene conversion and propene yield over the micro-sized H-ZSM-5 samples decreased by about 50% after reaction for only28 h, whereas over the nano-sized H-ZSM-5 sample the reaction time could be prolonged to 120 h. According to the coke analysis results, the coking rate on the nano-sized H-ZSM-5 sample was lower than that on the micro-sized samples.

Key words: ZSM-5 zeolite, nano-sized zeolite, micro-sized zeolite, butene, catalytic cracking, propene