TY - JOUR
T1 - Catalytic conversion of CO, NO and SO2 on the supported sulfide catalyst
T2 - I. Catalytic reduction of SO2 by CO
AU - Zhuang, S. X.
AU - Magara, H.
AU - Yamazaki, M.
AU - Takahashi, Y.
AU - Yamada, M.
N1 - Funding Information:
The present work was supported partly by the Center for Interdisciplinary Research of Tohoku University and partly by ‘Research for the Future Program’ of Japan Society for the Promotion of Science (JSPS). One of the authors (S.-X. Zhuang) is grateful to Tohoku University for the financial support during his research stay of 6 months in Sendai.
Copyright:
Copyright 2004 Elsevier Science B.V., Amsterdam. All rights reserved.
PY - 2000/1/17
Y1 - 2000/1/17
N2 - Catalytic reduction of SO2 to elemental sulfur by CO has been systematically investigated over γ-Al2O3-supported sulfide catalysts of transition metals including Co, Mo, Fe, CoMo and FeMo with different loadings of the metals. The sulfided CoMo/Al2O3 exhibited outstanding activity: a complete conversion of SO2 was achieved at a temperature of 300°C. The reaction proceeds catalytically and consistently over time and most efficiently at a molar feed ratio CO/SO2 = 2. A precursor CoMo/Al2O3 oxide which experienced sulfurization through the CO-SO2 reaction yielded a working sulfide catalyst having a yet lower activity than the CoMo catalyst sulfided before reaction (pre-sulfiding). The catalytic activity of various metal sulfides decreased in order of 4% Co 16% Mo > 4% Fe 15% Mo > 16% Mo ≥ 25% Mo > 14% Co ≥ 4% Co > 4% Fe. A DRIFT study showed that CO adsorbs exclusively on CoMo phase and that SO2 predominantly on γ-Al2O3. It is suggested that the Co-Mo-S structure is more adequate than the other metal-sulfur structures for the formation of a carbonyl sulfide (COS) intermediate because of the proper strength of metal-sulfur bond, and catalytically works with γ-Al2O3 for the COS-SO2 reaction.
AB - Catalytic reduction of SO2 to elemental sulfur by CO has been systematically investigated over γ-Al2O3-supported sulfide catalysts of transition metals including Co, Mo, Fe, CoMo and FeMo with different loadings of the metals. The sulfided CoMo/Al2O3 exhibited outstanding activity: a complete conversion of SO2 was achieved at a temperature of 300°C. The reaction proceeds catalytically and consistently over time and most efficiently at a molar feed ratio CO/SO2 = 2. A precursor CoMo/Al2O3 oxide which experienced sulfurization through the CO-SO2 reaction yielded a working sulfide catalyst having a yet lower activity than the CoMo catalyst sulfided before reaction (pre-sulfiding). The catalytic activity of various metal sulfides decreased in order of 4% Co 16% Mo > 4% Fe 15% Mo > 16% Mo ≥ 25% Mo > 14% Co ≥ 4% Co > 4% Fe. A DRIFT study showed that CO adsorbs exclusively on CoMo phase and that SO2 predominantly on γ-Al2O3. It is suggested that the Co-Mo-S structure is more adequate than the other metal-sulfur structures for the formation of a carbonyl sulfide (COS) intermediate because of the proper strength of metal-sulfur bond, and catalytically works with γ-Al2O3 for the COS-SO2 reaction.
KW - CO
KW - COS
KW - Catalytic reduction
KW - Cobalt molybdenum catalyst
KW - HDS
KW - Hydrodesulfurization
KW - SO
KW - Sulfide catalysts
UR - http://www.scopus.com/inward/record.url?scp=0034677030&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0034677030&partnerID=8YFLogxK
U2 - 10.1016/S0926-3373(99)00097-1
DO - 10.1016/S0926-3373(99)00097-1
M3 - Article
AN - SCOPUS:0034677030
VL - 24
SP - 89
EP - 96
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
SN - 0926-3373
IS - 2
ER -