Co-feeding with DME: An effective way to enhance gasoline production via low temperature aromatization of LPG

能源化学(英文) ›› 2013, Vol. 22 ›› Issue (5): 755-760.

Co-feeding with DME: An effective way to enhance gasoline production via low temperature aromatization of LPG

Xiangxue Zhu^a, Yuzhong Wang^a, Xiujie Li^a, Hongbing Li^b, Peng Zeng^c, Jie An^a, Fucun Chen^a, Sujuan Xie^a, Hongping Lan^d, Dawei Wang^c, Shenglin Liu^a, Longya Xu^a

a. Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China;
b. Fushun Petrochemical Company, CNPC, Fushun 113008, Liaoning, China;
c. Liaoning Branch Company, China Huanqiu Contracting and Engineering Corporation, Fushun 113006, Liaonin, China;
d. Guangxi Yuchai Petrochemical CO. , LTD, Qingzhou 535000, Guangxi, China

收稿日期:2012-12-03 修回日期:2013-04-15 出版日期:2013-09-20 发布日期:2013-09-30
通讯作者: Xiangxue Zhu, Longya Xu
基金资助:
This work was supported by the "Action Plan of CAS to Support China’s New and Strategic Industries with Science and Technology (2012?2014)", and the "Knowledge Innovation Program of the Chinese Academy of Sciences (S201041)".

Co-feeding with DME: An effective way to enhance gasoline production via low temperature aromatization of LPG

Xiangxue Zhu^a, Yuzhong Wang^a, Xiujie Li^a, Hongbing Li^b, Peng Zeng^c, Jie An^a, Fucun Chen^a, Sujuan Xie^a, Hongping Lan^d, Dawei Wang^c, Shenglin Liu^a, Longya Xu^a

a. Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China;
b. Fushun Petrochemical Company, CNPC, Fushun 113008, Liaoning, China;
c. Liaoning Branch Company, China Huanqiu Contracting and Engineering Corporation, Fushun 113006, Liaonin, China;
d. Guangxi Yuchai Petrochemical CO. , LTD, Qingzhou 535000, Guangxi, China

Received:2012-12-03 Revised:2013-04-15 Online:2013-09-20 Published:2013-09-30
Supported by:
This work was supported by the "Action Plan of CAS to Support China’s New and Strategic Industries with Science and Technology (2012?2014)", and the "Knowledge Innovation Program of the Chinese Academy of Sciences (S201041)".

摘要/Abstract

摘要： The aromatization of light alkenes in liquefied petroleum gas (LPG) with and without dimethyl ether (DME) addition in the feed was investigated on a modified ZSM-5 catalyst. The results showed that under the given reaction conditions the selectivity of alkenes to high-octane gasoline blending components was markedly enhanced and the formation of propane and butanes was greatly suppressed with the addition of DME. It was also found that the distribution of C₅₊ components was changed a lot with DME addition into the LPG feed. The formation of branched hydrocarbons (mainly C₆-C₈ i-paraffin) and multi-methyl substituted aromatics, which are high octane number gasoline blending components, was promoted significantly, while the content of n-paraffins and olefins in C₅₊ components was decreased obviously, indicating that in addition to the oligomerization, cracking, hydrogen-transfer and dehydrogenation-cyclization of alkenes, the methylation of the formed aromatics and olefins intermediates also plays an important role in determining the product distribution due to the high reactivity of surface methoxy groups formed by DME. And this process, in combination with the syngas-to-methanol/DME technology, provides an alternative way to the production of high-octane gasoline from coal, natural gas or renewable raw materials.

关键词: aromatization, gasoline, alkene, butene, dimethyl ether, co-feeding, ZSM-5

Abstract: The aromatization of light alkenes in liquefied petroleum gas (LPG) with and without dimethyl ether (DME) addition in the feed was investigated on a modified ZSM-5 catalyst. The results showed that under the given reaction conditions the selectivity of alkenes to high-octane gasoline blending components was markedly enhanced and the formation of propane and butanes was greatly suppressed with the addition of DME. It was also found that the distribution of C₅₊ components was changed a lot with DME addition into the LPG feed. The formation of branched hydrocarbons (mainly C₆-C₈ i-paraffin) and multi-methyl substituted aromatics, which are high octane number gasoline blending components, was promoted significantly, while the content of n-paraffins and olefins in C₅₊ components was decreased obviously, indicating that in addition to the oligomerization, cracking, hydrogen-transfer and dehydrogenation-cyclization of alkenes, the methylation of the formed aromatics and olefins intermediates also plays an important role in determining the product distribution due to the high reactivity of surface methoxy groups formed by DME. And this process, in combination with the syngas-to-methanol/DME technology, provides an alternative way to the production of high-octane gasoline from coal, natural gas or renewable raw materials.

Key words: aromatization, gasoline, alkene, butene, dimethyl ether, co-feeding, ZSM-5

Xiangxue Zhu, Yuzhong Wang, Xiujie Li, Hongbing Li, Peng Zeng, Jie An, Fucun Chen, Sujuan Xie, Hongping Lan, Dawei Wang, Shenglin Liu, Longya Xu. Co-feeding with DME: An effective way to enhance gasoline production via low temperature aromatization of LPG[J]. 能源化学(英文), 2013, 22(5): 755-760.

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Co-feeding with DME: An effective way to enhance gasoline production via low temperature aromatization of LPG

Co-feeding with DME: An effective way to enhance gasoline production via low temperature aromatization of LPG

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