Partial Oxidation of Methane to Syngas Over Rh and Ni Catalysts Impregnated on CeO2, SiO2, and Al2O3

Ho Joon Seo; Eui Yeon Yu

Journal of Industrial and Engineering Chemistry, Vol.11, No.5, 681-687, September, 2005

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Partial Oxidation of Methane to Syngas Over Rh and Ni Catalysts Impregnated on CeO2, SiO2, and Al2O3

Ho Joon Seo^†, and Eui Yeon Yu¹

Division of Biotechnology and Chemical Engineering, Yosu National University, Yosu 550-747, Korea
¹Department of Chemical Engineering and the Research Institute for Catalysis, Chonnam National University, Gwangju 500-757, Korea

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The partial oxidation of methane (POM) to syngas was investigated over Rh(5) and Ni(5) catalysts impregnated on CeO2, SiO2, and Al2O3 in a fixed bed flow reactor under atmospheric conditions. The catalysts were analyzed by TEM, , EDS, XPS, BET, and XRD. The CeO2 carrier exhibited a slightly higher initial catalytic activity than did the SiO2 and Al2O3 carriers for both the Rh(5) and Ni(5) catalysts. The stability of the Rh(5)/CeO2 and Ni(5)/CeO2 catalysts remained constant for this first 30 hr. The TEM and EDS analyses showed that the nanoparticles of Rh and Ni, as well as ceria, were located on the catalyst surface prior to the reaction. XPS spectra of the O 1s core electron levels for the reduced Rh(5)/CeO2 and the Ni(5)/CeO2 catalyst showed Ce4+ and Ce3+ ions. The high syngas yields over both the Rh(5)/CeO2 and Ni(5)/CeO2 catalysts suggest that important roles are played by CeO2-X, caused by formation of the lattice oxygen, O2-, and the oxygen vacancy due to the redox reaction between Ce4+ and Ce3+.

Keywords:partial oxidation of methane;carrier (CeO2;SiO2;Al2O3);Rh;Ni;redox reaction

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[1] Rostrup-Nielsen JR, Catal. Today, 63(2-4), 159 (2000)

[2] Seo HJ, Environ. Eng. Res., 7, 185 (2002)

[3] Lunsford JH, Catal. Today, 63(2-4), 165 (2000)

[4] Roh HS, Jun KW, Dong WS, Baek SC, Park SE, J. Ind. Eng. Chem., 8(5), 464 (2002)

[5] Takehira K, Shishido T, Wang P, Kosaka T, Takaki K, J. Catal., 221(1), 43 (2004)

[6] Yan QG, Wu TH, Weng WZ, Toghiani H, Toghiani RK, Wan HL, Pittman CU, J. Catal., 226(2), 247 (2004)

[7] Takeguchi T, Kikuchi R, Yano T, Eguchi K, Murata K, Catal. Today, 84(3-4), 217 (2003)

[8] Balint I, Miyazaki A, Aika K, J. Catal., 220(1), 74 (2003)

[9] Jun JH, Lee TJ, Lim TH, Nam SW, Hong SA, Yoon KJ, J. Catal., 221(1), 178 (2004)

[10] Takehira K, Shishido T, Kondo M, J. Catal., 207(2), 307 (2002)

[11] Fathi M, Bjorgum E, Viig T, Rokstad OA, Catal. Today, 63(2-4), 489 (2000)

[12] Ruckenstein E, Wang HY, J. Catal., 187(1), 151 (1999)

[13] Fajardie F, Tempere JF, Djegamariadassou G, Blanchard G, J. Catal., 163(1), 77 (1996)

[14] He H, Dai HX, Ng LH, Wong KW, Au CT, J. Catal., 206(1), 1 (2002)

[15] Bernal S, Kaspar J, Trovarelli A, Catal. Today, 50(2), 173 (1999)

[16] He H, Dai H, Au CT, Catal. Today, 90(3-4), 245 (2004)

[17] Shin WS, Jung CR, Han J, Nam SW, Lim TH, Hong SA, Lee HI, J. Ind. Eng. Chem., 10(2), 302 (2004)

[18] Xu J, Overbury SH, J. Catal., 222(1), 167 (2004)

[19] Seo HJ, Yu EY, Environ. Eng. Res., 7, 247 (2002)

[20] Craciun R, Daniell W, Knozinger H, Appl. Catal. A: Gen., 230(1-2), 153 (2002)

[21] Larese C, Galisteo FC, Granados ML, Mariscal R, Fierro JLG, Lambrou PS, Efstathiou AM, J. Catal., 226(2), 443 (2004)

[22] Sheng PY, Bowmaker GA, Idriss H, Appl. Catal. A: Gen., 261(2), 171 (2004)

[23] Damyanova S, Bueno JMC, Appl. Catal. A: Gen., 253(1), 135 (2003)

[24] Stoyanova M, Christoskova S, Georgieva M, Appl. Catal. A: Gen., 249(2), 285 (2003)

[25] Ojeda M, Granados ML, Rojas S, Terreros P, Garcia-Garcia FJ, Fierro JLG, Appl. Catal. A: Gen., 261(1), 47 (2004)

[26] Lassi U, Polvinen R, Suhonen S, Kallinen K, Savimaki A, Harkonen M, Valden M, Keiski RL, Appl. Catal. A: Gen., 263(2), 241 (2004)

[27] Wengsieh Z, Gronsky R, Bell AT, J. Catal., 170(1), 62 (1997)

[28] Martinez R, Romero E, Guimon C, Bilbao R, Appl. Catal. A: Gen., 274(1-2), 139 (2004)

[29] Sadi F, Duprez D, Gerard F, Miloudi A, J. Catal., 213(2), 226 (2003)