Catalytic performance on upgrading saudi medium crude oil over Ag-Ga/ZSM-5 catalyst and the formation mechanistic study of light aromatics product

被引：0
|
作者：
Zhong J. [1 ]
Lei J. [2 ]
Li K. [1 ,2 ]
Wang H. [1 ]
Peng P. [1 ]
Wang Y. [1 ]
Yan Z. [1 ]
机构：
[1] State Key Laboratory for Heavy Oil Processing in China University of Petroleum(East China), Qingdao
[2] Luoyang R&D Center of Technology of SINOPEC Engineering (Group) Company Limited, Luoyang
来源：
Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science) | 2023年 / 47卷 / 03期
关键词：
catalyst; heavy oil upgrading; light aromatics; methane activation; model compound;
D O I：
10.3969/j.issn.1673-5005.2023.03.021
中图分类号：
学科分类号：
摘要：
Catalysts for heavy oil upgrading were prepared through incipient wetness impregnation method using one commercial ZSM-5 zeolite as a carrier with Ag-Ga loadings. The catalysts were characterized by XRD, Py-FTIR, N2 adsorption-desorption isotherms and temperature-programmed desorption of ammonia. The effects of reaction temperature (380-420 ℃) on Saudi medium crude oil upgrading and light aromatics production under methane were studied. The results indicate that the supported metals such as Ag and Ga are highly dispersed on the Ag-Ga/ ZSM-5 catalyst, and there are less Brönsted acid sites and more Lewis acid sites. It is found that the synergistic effect of highly dispersed supported metal species, the generated Lewis acid sites and Brönsted acid sites on the supports can achieve good performance for crude oil upgrading. Also, proper increasing of reaction temperature (380-400 ℃) is favorable to upgrading performance. However, high temperature (410-420 ℃) will reduce the liquid yield of product oil and cause serious coke formation. The best upgrading performance is obtained when the reaction temperature is 400 ℃, at which the properties of the product oil can be significantly improved and the mass fraction of light aromatics increased by 11. 32%. The catalysts with highly dispersed Ag, Ga metal species, less Brönsted acid and more Lewis acid can effectively activate methane, which participates in the co-aromatization and alkylation of gasoline fractions and the cracking of diesel fractions to produce a large number of light aromatics. © 2023 University of Petroleum, China. All rights reserved.
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页码：181 / 189
页数：8
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