石油学报(石油加工) ›› 2019, Vol. 35 ›› Issue (5): 965-972.doi: 10.3969/j.issn.1001-8719.2019.05.018

• 研究报道 • 上一篇    下一篇

ZSM-5催化剂在多周期MTP反应中的再生行为

王林1,2, 齐静3, 关翀3, 袁炜3, 焦洪桥3, 廖祖维2, 金政伟3, 张安贵3, 雍晓静3, 李云3, 刘殿华1   

  1. 1华东理工大学 化学工程联合国家重点实验室,上海 200237;2浙江大学 化学工程与生物工程学院,浙江 杭州 310027;
    3国家能源宁夏煤业集团有限责任公司,宁夏 银川 750001
  • 收稿日期:2018-12-17 修回日期:2019-04-20 出版日期:2019-09-25 发布日期:2020-04-01
  • 通讯作者: 刘殿华,男,教授,博士,从事碳一化工与反应工程研究,E-mail:dhliu@ecust.edu.cn;焦洪桥,男,教授级高级工程师,学士,从事煤化工技术研究,E-mail:13895018065@126.com E-mail:dhliu@ecust.edu.cn
  • 作者简介:王林,男,博士研究生,从事碳一催化转化方面的研究
  • 基金资助:
    国家国际科技合作项目(2015DFA40660)、宁夏回族自治区科技支撑计划项目(2018DE63007和2018BDE63020)和宁夏回族自治区人才项目(KJT2018003)资助

Regeneration Behaviors of the ZSM-5 Catalysts WithDifferent MTP Reaction Regeneration Cycles

WANG Lin1,3, QI Jing3, GUAN Chong3, YUAN Wei3, JIAO Hongqiao3, LIAO Zuwei2, JIN Zhengwei3, ZHANG Angui3, YONG Xiaojing3, LI Yun3, LIU Dianhua1   

  • Received:2018-12-17 Revised:2019-04-20 Online:2019-09-25 Published:2020-04-01

摘要: 采用热重分析探讨了经过多周期MTP反应后的工业ZSM5催化剂的再生行为,考察了催化剂积炭量、烧炭温度及氧分压对烧炭再生过程的影响。将不同周期催化剂的酸性和孔道结构作为动力学模型预测的重要因素,建立了多周期ZSM5催化剂的本征烧炭反应动力学模型。结果表明:当再生气流量为70 mL/min时,可排除失活催化剂的外扩散,不同周期失活催化剂的积炭类型较为接近;随着反应再生周期数的增加,碳级数逐渐变小、氧分压级数逐渐增大,构建的模型能较好地与实验数据拟合,相对误差在5%左右。

关键词: 甲醇制丙烯(MTP), 催化剂, 失活, 再生, ZSM-5分子筛

Abstract: Regeneration behaviors of industrial ZSM5 catalysts with different MTP reactionregeneration cycles were studied by thermo gravimetric analysis method. Effects of the amount of carbon deposit, regeneration temperature and oxygen partial pressure on the regeneration process were investigated. Intrinsic kinetic model of the regeneration of ZSM5 catalysts with different MTP reactionregeneration cycles was established, in which the acidity and pore structure of the catalyst were important factors. Results show that the external diffusion of the catalyst is negligible when the flow rate of regeneration gas is 70 mL/min and the carbon deposition types of deactivated catalysts under different cycles are similar. With the increasing of the number of cycles, the carbon series becomes smaller and the oxygen partial pressure series increases gradually. The model is fitted well with the experimental data and the relative error is about 5%.

Key words: MTP, catalyst, deactivity, regeneration, ZSM-5