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Received October 24, 2000
Accepted January 15, 2001
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Oxidative Coupling of Methane over Transition-Metal-Substituted Strontium Hydroxyapatite
Department of Chemical Engineering, Sungkyunkwan University, Suwon 440-746, Korea
Korean Journal of Chemical Engineering, March 2001, 18(2), 228-232(5), 10.1007/BF02698464
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Abstract
Lead-substituted strontium hydroxyapatite (Sr(10-x)Pb(x)(OH)2(PO4)6) showed remarkably enhanced catalytic performance for the oxidative coupling of methane (OCM) when compared with the unsubstituted strontium hydroxyapatite. Other substituted transition metals such as zinc, cobalt and nickel were not so effective for improving the catalytic performance for the OCM. The Ni-substituted catalyst exhibited quite different catalytic behavior: CO and hydrogen were the major products instead of the C2 products. The catalyst with the extent of Pb substitution(x) of 0.2 showed the highest C2 selectivity and yield (about 47% and 17% at 1,023 K, respectively) and also exhibited quite stable behavior.
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References
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Bae YK, Jun JH, Yoon KJ, Korean J. Chem. Eng., 16(5), 595 (1999)
Baeck SH, Chung JS, Lee WY, HWAHAK KONGHAK, 36(3), 429 (1998)
Cho W, Baek Y, Pang H, Kim YC, Korean J. Chem. Eng., 15(5), 500 (1998)
Guo XM, Hidajat K, Ching CB, Korean J. Chem. Eng., 15(5), 469 (1998)
Hong JH, Yoon KJ, Appl. Catal. A: Gen., 205(1-2), 253 (2001)
Hutchings GJ, Scurrell MS, "Methane Conversion by Oxidative Processes: Fundamental and Engineering Aspects," Wolf, E.E., ed., Van Nostrand Reinhold, New York, 200 (1992)
Kim SH, Cho SM, Yoon KJ, Korean J. Chem. Eng., 14(1), 69 (1997)
Kim CS, Lee WY, HWAHAK KONGHAK, 31(1), 62 (1993)
Kim SC, Sunwoo CS, Yu EY, Korean J. Chem. Eng., 7(4), 279 (1990)
Kim SC, Yu EY, HWAHAK KONGHAK, 28(5), 536 (1990)
Kong SJ, Bae YK, Yoon KJ, Korean J. Chem. Eng., 16(2), 234 (1999)
Lee JS, Oyama ST, Catal. Rev.-Sci. Eng., 30, 249 (1988)
Lee JS, Oyama ST, Korean J. Chem. Eng., 6(1), 54 (1989)
Lee KY, Han YC, Suh DJ, Park TJ, Stud. Surf. Sci. Catal., 119, 385 (1998)
Maitra AM, Appl. Catal. A: Gen., 104, 11 (1993)
Matsumura Y, Sugiyama S, Hayashi H, Moffat JB, Catal. Lett., 30(1-4), 235 (1995)
Rosie DM, Barry EF, J. Chromatogr. Sci., 11, 237 (1973)
Sugiyama S, Minami T, Hayashi H, Tanaka M, Moffat JB, J. Solid State Chem., 126, 242 (1996)
Yoon KJ, Seo SW, Appl. Catal. B: Environ., 7(3-4), 237 (1996)
Yoon KJ, Seo SW, Appl. Catal. A: Gen., 161(1-2), L5 (1997)
Yoon KJ, Tung HL, Appl. Catal. A: Gen., 159(1), 59 (1997)
