MCM-41-supported Co-Mo catalysts for deep hydrodesulfurization of light cycle oil

被引:89
作者
Turaga, UT [1 ]
Song, CS [1 ]
机构
[1] Penn State Univ, Dept Energy & Geoenvironm Engn, Energy Inst & Fuel Sci Program, Clean Fuels & Catalysis Program, University Pk, PA 16802 USA
关键词
MCM-41; catalyst; desulfurization; dimethyldibenzothiophene; fuel; diesel fuel; light cycle oil;
D O I
10.1016/S0920-5861(03)00463-2
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Light cycle oil (LCO), a by-product of the fluid catalytic cracking (FCC) process in a petroleum refinery, can be used as a blendstock for the production of diesel and jet fuels. Regulatory and operational issues result in need for new and more active catalysts for the deep hydrodesulfurization (HDS) of diesel feedstocks, such as LCO. This paper reports the activity of a mesoporous molecular sieve MCM-41-supported Co-Mo catalyst in comparison to a commercial gamma-alumina (Al2O3)-supported Co-Mo catalyst for the desulfurization of a LCO with a sulfur content of 2.19 wt.%. The HDS of dibenzothiophene, 4-methyldibenzothiophene, and 4,6-dimethyldibenzothiophene-polyaromatic sulfur compounds present in LCO-and their relative reactivities in terms of conversion were examined as a function of time on stream in a fixed-bed flow reactor. The MCM-41-supported catalyst demonstrates consistently higher activity for the HDS of the refractory dibenzothiophenic sulfur compounds, particularly 4,6-dimethyldibenzothiophene. The presence of a large concentration of aromatics in LCO appears to inhibit the HDS of the substituted dibenzothiophenes. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码:129 / 140
页数:12
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