CIESC Journal ›› 2017, Vol. 68 ›› Issue (10): 3816-3822.DOI: 10.11949/j.issn.0438-1157.20170489

Previous Articles     Next Articles

Regeneration of zeolite catalyst for dimethyl ether carbonylation

LIU Yahua, LI Yang, WANG Ke, YE Qiuyun, LIU Peng   

  1. Southwest Research & Design Institute of Chemical Industry Co., Ltd., National C1 Chemical Engineering and Technology Research Center, State Key Laboratory of Industrial Vent Gas Reuse, Chengdu 610225, Sichuan, China
  • Received:2017-04-27 Revised:2017-08-23 Online:2017-10-05 Published:2017-10-05

二甲醚羰基化催化剂的烧炭再生

刘亚华, 李扬, 王科, 叶秋云, 刘芃   

  1. 西南化工研究设计院有限公司, 国家碳一化学工程技术研究中心, 工业排放气综合利用国家重点实验室, 四川 成都 610225
  • 通讯作者: 刘亚华,liuyahua@tju.edu.cn

Abstract:

The H-MOR zeolite catalysts were prepared by hydrothermal synthesis.An inactivated catalyst which was used in dimthyl ether carbonylaiton was regenerated.The effects of gas,coke-burning temperature,O2 volume fraction and heating rate on the coke-burning process were investigated.The results of TPO and XRD analysis showed that there was different property coke on the inactivated catalyst.In the optimum conditions for the coke-burning of the inactivated catalyst,temperature 550℃,heating rate of 2℃·min-1 and O2 volume fraction of 3%,the catalyst activity was almost completely restored.The fresh and regenerated catalysts were characterized by means of NH3-TPD and N2 adsorption-desorption.The results showed that the coke was removed cleanly and channels were protected in the optimum condition.

Key words: zeolite, catalyst, dimethyl ether, carbonylation, deactivation, regeneration

摘要:

以水热合成的H-MOR分子筛催化剂,通过对二甲醚羰基化反应失活后催化剂进行再生,考察了不同再生气体、再生温度、O2体积分数、烧炭升温速率等条件,烧炭后催化剂上二甲醚羰基化活性性能。TPO表征结果表明:反应后H-MOR分子筛上有两种不同性质的积炭。积炭催化剂在3%(体积) O2/N2气氛中,从室温以2℃·min-1升温至320℃恒温一段时间,然后以相同速率升温至550℃进行烧炭,再生催化剂活性几乎完全恢复。NH3-TPD和BET表征结果表明,再生催化剂活性得以恢复是因为优化了烧炭方案,分子筛表面积炭能够被烧除干净同时分子筛孔道不被破坏。

关键词: 分子筛, 催化剂, 二甲醚, 羰基化, 失活, 再生

CLC Number: