二甲醚羰基化催化剂的烧炭再生

doi:10.11949/j.issn.0438-1157.20170489

摘要/Abstract

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

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

中图分类号:

O643.3

刘亚华, 李扬, 王科, 叶秋云, 刘芃. 二甲醚羰基化催化剂的烧炭再生[J]. 化工学报, 2017, 68(10): 3816-3822.

LIU Yahua, LI Yang, WANG Ke, YE Qiuyun, LIU Peng. Regeneration of zeolite catalyst for dimethyl ether carbonylation[J]. CIESC Journal, 2017, 68(10): 3816-3822.

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