吡啶离子液体催化作用下的FCC汽油烷基化脱硫

唐晓东; 袁娇阳; 李晶晶; 张永汾; 胡涛

吡啶离子液体催化作用下的FCC汽油烷基化脱硫

1.
西南石油大学油气藏地质及开发工程国家重点实验室, 四川成都 610500;
2.
西南石油大学化学化工学院, 四川成都 610500

详细信息

通讯作者:
唐晓东(1963-), 男, 教授, 硕士, 从事工业催化、石油产品加工精制方向的教学与科研工作, Tel:15108255288, E-mail:txd3079@163.com。

中图分类号: TE624.5
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出版历程
- 收稿日期: 2014-11-03
- 刊出日期: 2015-04-30

Alkylation desulfurization of FCC gasoline catalyzed by pyridine ionic liquid

1.
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China;
2.
College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China

摘要

摘要: 合成一种Brønsted酸性离子液体[BPY]HSO₄,采用红外光谱和核磁共振对其进行表征。以[BPY]HSO₄为催化剂,对FCC汽油进行烷基化脱硫,考察反应温度、反应时间和剂油质量比对脱硫效果的影响及脱硫前后FCC汽油性质的变化,并对[BPY]HSO₄进行了再生。结果表明,在反应温度为65 ℃、反应时间为90 min和剂油质量比为0.09的条件下,FCC汽油的硫含量从580.0 μg/g降至6.4 μg/g,脱硫率为98.90%,满足中国国Ⅴ车用汽油硫含量标准(<10 μg/g);脱硫前后硫分布变化表明,在[BPY]HSO₄的催化作用下,前170 ℃馏分油中硫化物大部分转移到后170 ℃重馏分中,重馏分中硫化物可采用加氢方法进行脱除;PONA组成变化表明,烷基化脱硫过程对FCC汽油的烃类组成影响较小,且脱硫前后辛烷值变化不大;[BPY]HSO₄经萃取再生后可循环使用。
- FCC汽油 /
- 吡啶 /
- 离子液体 /
- 烷基化 /
- 硫转移 /
- 脱硫
Abstract: Brønsted acidic ionic liquid [BPY]HSO₄ was synthesized and characterized by FT-IR and ¹H-NMR. [BPY]HSO₄ was then used as a catalyst in alkylation desulfurization of FCC gasoline; the effects of the reaction temperature, time and mass ratio of ionic liquid to oil on the desulfurization efficiency and FCC gasoline quality were investigated. The results showed that after reaction for 90 min under 65 ℃ and an ionic liquid to oil mass ratio of 0.09, the sulfur content of FCC gasoline is decreased from 580.0 to 6.4 μg/g, with a desulfurization rate of 98.90%, which can meet the request of Chinese National Standard V for the sulfur content in motor gasoline (< 10 μg/g). A survey on the distribution of sulfur compounds indicated that sulfur compounds are transferred from light fraction (< 170 ℃) to heavy fraction (> 170 ℃) with the help of [BPY]HSO₄ and the sulfur compounds in heavy fraction can then be removed further by hydrodesulfurization. PONA results indicated that the alkylation desulfurization catalyzed by [BPY]HSO₄ has little effect on hydrocarbon composition and octane number of FCC gasoline. Moreover, the [BPY]HSO₄ ionic liquid can be recycled through extraction and reused in the alkylation desulfurization.
- FCC gasoline /
- pyridine /
- ionic liquid /
- alkylation /
- sulfur transfer /
- desulfurization

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