Preparation of modified Ce-SAPO-34 catalysts and their catalytic performances of methanol to olefins

能源化学(英文) ›› 2013, Vol. 22 ›› Issue (4): 605-609.

Preparation of modified Ce-SAPO-34 catalysts and their catalytic performances of methanol to olefins

Shuxun Tian^a,b, Shengfu Ji^a, Dandan Lü^a, Bingyang Bai^a, Qi Sun^b

a. State key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China;
b. National Institute of Clean-and-Low Carbon Energy, Beijing 102209, China

收稿日期:2012-06-26 修回日期:2012-08-11 出版日期:2013-07-20 发布日期:2013-07-27
通讯作者: Shengfu Ji
基金资助:
This work was supported by the National Key Basic Research Development Program of China (NO: 2006CB202503).

Preparation of modified Ce-SAPO-34 catalysts and their catalytic performances of methanol to olefins

Shuxun Tian^a,b, Shengfu Ji^a, Dandan Lü^a, Bingyang Bai^a, Qi Sun^b

a. State key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China;
b. National Institute of Clean-and-Low Carbon Energy, Beijing 102209, China

Received:2012-06-26 Revised:2012-08-11 Online:2013-07-20 Published:2013-07-27
Supported by:
This work was supported by the National Key Basic Research Development Program of China (NO: 2006CB202503).

摘要/Abstract

摘要： The modified Ce-SAPO-34 catalysts were prepared with three methods, i.e., the liquid ion exchange with air calcination, impregnation with air calcination and impregnation with steam calcination methods. The catalytic performances of the catalysts for methanol to olefins were investigated. The properties of the catalysts were characterized using XRD, BET, XRF, FT-IR and NH₃-TPD. The results indicated that compared to the SAPO-34 catalyst the catalyst prepared with the impregnation and air calcination prolonged the lifetime by 40 min and improved the selectivity to ethylene by 5% (mol) and the catalyst prepared with the impregnation and steam calcination showed the best modification effect, prolonging the lifetime by 70 min and improving the ethylene selectivity by 10% (mol). The catalyst prepared with the liquid ion exchange showed similar behaviour as the SAPO-34 catalyst. It was verified that the porous structure and surface acidity of these catalysts determined their catalytic behaviors.

关键词: SAPO-34, methanol, olefins, modification

Abstract: The modified Ce-SAPO-34 catalysts were prepared with three methods, i.e., the liquid ion exchange with air calcination, impregnation with air calcination and impregnation with steam calcination methods. The catalytic performances of the catalysts for methanol to olefins were investigated. The properties of the catalysts were characterized using XRD, BET, XRF, FT-IR and NH₃-TPD. The results indicated that compared to the SAPO-34 catalyst the catalyst prepared with the impregnation and air calcination prolonged the lifetime by 40 min and improved the selectivity to ethylene by 5% (mol) and the catalyst prepared with the impregnation and steam calcination showed the best modification effect, prolonging the lifetime by 70 min and improving the ethylene selectivity by 10% (mol). The catalyst prepared with the liquid ion exchange showed similar behaviour as the SAPO-34 catalyst. It was verified that the porous structure and surface acidity of these catalysts determined their catalytic behaviors.

Key words: SAPO-34, methanol, olefins, modification

Shuxun Tian, Shengfu Ji, Dandan Lü, Bingyang Bai, Qi Sun. Preparation of modified Ce-SAPO-34 catalysts and their catalytic performances of methanol to olefins[J]. 能源化学(英文), 2013, 22(4): 605-609.

Shuxun Tian, Shengfu Ji, Dandan Lü, Bingyang Bai, Qi Sun. Preparation of modified Ce-SAPO-34 catalysts and their catalytic performances of methanol to olefins[J]. Journal of Energy Chemistry, 2013, 22(4): 605-609.

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Preparation of modified Ce-SAPO-34 catalysts and their catalytic performances of methanol to olefins

Preparation of modified Ce-SAPO-34 catalysts and their catalytic performances of methanol to olefins

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