催化裂化汽油临氢异构化/芳构化改质过程的反应特性

doi:10.3969/j.issn.0438-1157.2014.07.036

化工学报 ›› 2014, Vol. 65 ›› Issue (7): 2751-2760.DOI: 10.3969/j.issn.0438-1157.2014.07.036

• 催化、动力学与反应器 • 上一篇下一篇

催化裂化汽油临氢异构化/芳构化改质过程的反应特性

陈治平¹, 徐建¹, 石冈¹, 范煜¹, 鲍晓军^1,2

1. 中国石油大学(北京)中国石油天然气集团公司催化重点实验室, 北京 102249;
2. 中国石油大学(北京)重质油国家重点实验室, 北京 102249

收稿日期:2014-04-21 修回日期:2014-04-28 出版日期:2014-07-05 发布日期:2014-07-05
通讯作者: 鲍晓军
基金资助:
国家重点基础研究发展计划项目（2010CB226905）。

Hydroisomerization and aromatization hydro-upgrading behavior of fluid catalytic cracking gasoline

CHEN Zhiping¹, XU Jian¹, SHI Gang¹, FAN Yu¹, BAO Xiaojun^1,2

1. Key Laboratory of Catalysis, China National Petroleum Corporation, China University of Petroleum, Beijing 102249, China;
2. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China

Received:2014-04-21 Revised:2014-04-28 Online:2014-07-05 Published:2014-07-05
Supported by:
supported by the National Basic Research Program of China (2010CB226905).

摘要/Abstract

摘要： 采用工业Ni-Mo/Al₂O₃-HZSM-5催化剂在小型固定床加氢微反装置上对催化裂化（FCC）汽油临氢改质过程的反应特性进行了研究，通过考察反应温度、压力、空速和氢油体积比对改质后的FCC汽油烃类组成的影响，分析了汽油中不同烃类的转化性能。结果表明，氢油比对产物组成影响不大，高温、低压、低空速有利于增加芳烃的选择性，低温、高压、高空速则有利于增加异构烷烃的选择性；临氢改质后，FCC汽油的烯烃含量明显降低，芳烃和异构烷烃含量增加，因而产品汽油的辛烷值基本保持不变；全馏分、轻馏分和重馏分FCC汽油临氢改质实验结果表明，烯烃含量较高的轻馏分具有更高的转化活性；在FCC汽油临氢改质过程中，同碳数的端烯烃反应活性高于内烯烃，直链烯烃的反应活性高于支链烯烃。

关键词: 降烯烃, 辛烷值恢复, 化学反应, 固定床, 活性

Abstract: The hydroisomerization and aromatization behavior of fluid catalytic cracking(FCC) gasoline was studied over a commercial Ni-Mo/Al₂O₃-HZSM-5 catalyst in a fixed bed microreactor. The effects of reaction temperature, pressure, weight hourly space velocity (WHSV), volumetric H₂/oil ratio were investigated by analyzing the changes in group compositions between feedstock and products. Volumetric H₂/oil ratio had negligible effect on product composition, higher reaction temperature, lower pressure and lower WHSV favored olefin aromatization, while lower reaction temperature, higher pressure and higher WHSV favored olefin isomerization. The hydro-upgraded FCC gasoline had reduced olefin content and increased isoparaffin and aromatics contents and thus had well-preserved octane rating. Lighter FCC naphtha with higher olefin content had the highest reactivity, with alpha-olefins being more reactive than internal ones and linear olefins being more reactive than branched ones.

Key words: olefin reduction, octane recovery, chemical reaction, fixed bed, reactivity

中图分类号:

TE62

陈治平, 徐建, 石冈, 范煜, 鲍晓军. 催化裂化汽油临氢异构化/芳构化改质过程的反应特性[J]. 化工学报, 2014, 65(7): 2751-2760.

CHEN Zhiping, XU Jian, SHI Gang, FAN Yu, BAO Xiaojun. Hydroisomerization and aromatization hydro-upgrading behavior of fluid catalytic cracking gasoline[J]. CIESC Journal, 2014, 65(7): 2751-2760.

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催化裂化汽油临氢异构化/芳构化改质过程的反应特性

Hydroisomerization and aromatization hydro-upgrading behavior of fluid catalytic cracking gasoline

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