The Adsorptive Removal of Thiophene from Benzene over ZSM-5 Zeolite

被引：13
作者：
Liao, J. [1 ,2 ]
Bao, W. [1 ,2 ]
Chen, Y. [1 ,2 ]
Zhang, Y. [1 ,2 ]
Chang, L. [1 ,2 ]
机构：
[1] Taiyuan Univ Technol, State Key Lab Coal Sci & Technol, Taiyuan 030024, Shanxi, Peoples R China
[2] Taiyuan Univ Technol, Minist Sci & Technol, Taiyuan 030024, Shanxi, Peoples R China
来源：
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS | 2012年 / 34卷 / 5-8期
关键词：
benzene; ion-exchange; sorbent; thiophene; ZSM-5; zeolite; PI-COMPLEXATION; LIQUID FUELS; SELECTIVE ADSORPTION; DEEP DESULFURIZATION; TRANSPORTATION FUELS; DIESEL FUEL; SORBENTS; GASOLINE; NAY;
D O I：
10.1080/15567036.2010.549916
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
ZSM-5 zeolites with different Si/Al ratio (25, 38, 50) were selected for the research of adsorptive removing thiophene from benzene and the desulfurization behavior of H-ZSM-5(25) sorbent acid-modified and ion-exchanged was studied. The experimental results show that the sorbent H-ZSM-5(25) from acid-modified ZSM-5 zeolite with a Si/Al ratio of 25 is the best sorbent with the largest amount of Bronsted acidic sites, which plays an important role in the adsorption of thiophene. The results of the sorbents from H-ZSM-5(25) ion-exchanged with Ag+, Ni2+, Ce3+, and La3+ show that the desulfurization efficiency is increased for all ion-exchanged zeolites, because thiophene can be adsorbed via pi-complexation over Ag-ZSM-5(25) and Ni-ZSM-5(25) zeolites, while through the S-M bond on Ce-ZSM-5(25) and La-ZSM-5(25) zeolites. Benzene can bring the effect of competitive adsorption with thiophene via pi-complexation, so the efficiency of Ce-ZSM-5(25) and La-ZSM-5(25) removing thiophene from benzene by the selective S-M bond is better than that of Ag-ZSM-5(25) and Ni-ZSM-5(25), which can respectively reach to 92.7 and 93.9%.
引用
收藏
页码：618 / 625
页数：8
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