TY - JOUR
T1 - MCM-41-supported Co-Mo catalysts for deep hydrodesulfurization of light cycle oil
AU - Turaga, Uday T.
AU - Song, Chunshan
N1 - Funding Information:
This work was supported in part by the US Air Force Office of Scientific Research and the US Department of Energy. The authors are also grateful to Professor Harold H. Schobert and Dr. Xiaoliang Ma for helpful discussions.
PY - 2003/11/1
Y1 - 2003/11/1
N2 - 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 γ-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.
AB - 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 γ-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.
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U2 - 10.1016/S0920-5861(03)00463-2
DO - 10.1016/S0920-5861(03)00463-2
M3 - Article
AN - SCOPUS:0141998576
SN - 0920-5861
VL - 86
SP - 129
EP - 140
JO - Catalysis Today
JF - Catalysis Today
IS - 1-4
ER -