Abstract
A series of cobalt–magnesium oxide solid solution catalysts (CoMgO) have been prepared using urea combustion methods, and characterised by X-ray diffraction (XRD) and laser Raman (LR). The catalytic activities for methane combustion have been tested in a continuous-flow microreactor. The Co content has a significant effect on the activity of the cobalt–magnesium oxide solid solution catalysts. The catalysts containing 5 and 10% Co have the lowest light-off temperature in methane combustion. In the preparation of cobalt–magnesium oxide solid solution catalysts, higher urea to metal ratio favors the formation of the catalysts with smaller crystal particles and leads to a better catalytic performance for methane combustion. Addition of lanthanum nitrate to the solution of Co and Mg nitrate depressed the formation of the cobalt–magnesium oxide solid solution and decreased the activity of the catalysts for methane combustion. The cobalt–magnesium oxide solid solution catalysts are very stable when the calcination or reaction temperature is no more than 900°C. However, the catalytic activity decreases rapidly after high temperature (>1000°C) calcination, possibly due to sintering of the catalyst and thus decrease of the surface area.
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References
P. Euzen,J. Le Gal,B. Rebours andG. Martin, Catal. Today 47 (1999) 19.
B. Jang,R.M. Nelson,J.J. Spivey,M. Ocal,R. Oukaci andG. Marcelin, Catal. Today 47 (1999) 103.
A.J. Zarur andJ.Y. Ying, Nature 403 (2000) 65.
P. Artizzu,N. Guilhaume,E. Garbowski,Y. Brulle andM. Primet, Catal. Lett. 51 (1998) 69.
P. Artizzu-Duart,J.M. Millet,N. Guilhaume,E. Garbowski andM. Primet, Catal. Today 59 (2000) 163.
S. Cimino,L. Lisi,R. Pirone,G. Russo andM. Turco, Catal. Today 59 (2000) 19.
S. Ponce,M.A. Pena andJ.L.G. Fierro, Appl. Catal. B 24 (2000) 193.
P. Ciambelli,S. Cimino,S.D. Rossi,M. Faticanti,L. Lisi,G. Minelli,I. Pettiti,P. Porta,G. Russo andM. Turco, Appl. Catal. B 24 (2000) 243.
C.A. Querini,M.A. Ulla,F. Requejo,J. Soria,U.A. Sedran andE.E. Miro, Appl. Catal. B 15 (1998) 5.
C.A. Querini,L.M. Cornaglia,M.A. Ulla andE.E. Miro, Appl. Catal. B 20 (1999) 165.
M.A. Ulla,R. Spretz,E. Lombardo,W. Daniell andH. Knözinger, Appl. Catal. B 29 (2001) 217.
V.G. Milt,M.A. Ulla andE.A. Lombardo, Catal. Lett. 65 (2000) 67.
E. Flahaut,A. Peigney,Ch. Laurent andA. Rousset, J. Mater. Chem. 10 (2000) 249.
H. Shirai,Y. Morioka andI. Nakagawa, J. Phys. Soc. Jpn. 51 (1982) 592.
V.G. Hadjiev,M.N. Iliev andI.V. Vergilov, J. Phys. C 21 (1988) L199.
G. Thornton,B.C. Tofield andA.W. Hewat, J. Solid State Chem. 61 (1986) 301.
P. Aldebert andJ.P. Traverse, Mater. Res. Bull. 14 (1979) 303.
B.M. Weckhuysen,M.P. Rosynek andJ.H. Lunsford, Phys. Chem. Chem. Phys. 1 (1999) 3157.
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Ji, SF., Xiao, TC., Wang, HT. et al. Catalytic Combustion of Methane over Cobalt–Magnesium Oxide Solid Solution Catalysts. Catalysis Letters 75, 65–71 (2001). https://doi.org/10.1023/A:1016711207912
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DOI: https://doi.org/10.1023/A:1016711207912