噻吩
沸石
苯
吸附剂
吸附
烟气脱硫
无机化学
化学
ZSM-5型
布朗斯特德-洛瑞酸碱理论
催化作用
材料科学
化学工程
有机化学
作者
Junhui Liao,Wei Bao,Yi Chen,Y. Zhang,Leland Chang
标识
DOI:10.1080/15567036.2010.549916
摘要
Abstract 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 π-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 π-complexation, so the efficiency of Ce-ZSM-5(25) and La-ZSM-5(25) removing thiophene from benzene by the selec...
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