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Oxidative Coupling of Methane over Sodiun-Chloride-Added Sodium Zirconium Phosphates
Korean Journal of Chemical Engineering, March 1999, 16(2), 234-240(7), 10.1007/BF02706842
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Abstract
Monosodium zirconium phosphate or disodium zirconium phosphate by itself did not catalyze the oxidative coupling of methane and also the deep oxidation of methane. However, NaCl-added sodium zirconium phosphates showed markedly increased activity and high C2+ selectivity in the oxidative coupling of methane, which indicates that chlorine species or NaCl plays an essential role in the catalytic action. The catalytic performance became more stable with increasing content of NaCl. The primary reason for the catalyst deactivation is the loss of chlorine, and a possible secondary reason is the transformation of catalytic substance to the sodium zirconium phosphates having higher Na/Zr ratios or decomposition of sodium zirconium phosphates to zirconium oxide and sodium phosphate. Two kinds of surface chlorine species were observed, and the lower-binding-energy species is considered to be much more active than the higher-binding-energy species in methane activation, although the latter is present in a larger amount than the former.
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References
Amenomiya Y, Birss VI, Catal. Rev.-Sci. Eng., 32, 163 (1990)
Baeck SH, Chung JS, Lee WY, HWAHAK KONGHAK, 36(3), 429 (1998)
Briggs D, Seah MP, "Practical Surface Analysis," 2nd ed., Wiley, Appendix 5, Chichester, 1 (1990)
Chang JS, Park SE, Lee YK, HWAHAK KONGHAK, 27(3), 323 (1989)
Cho W, Baek Y, Pang H, Kim YC, Korean J. Chem. Eng., 15(5), 500 (1998)
Clearfield A, Landis AL, Medina AS, Troup JM, J. Inorg. Nucl. Chem., 35, 1099 (1973)
Guo XM, Hidajat K, Ching CB, Korean J. Chem. Eng., 15(5), 469 (1998)
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 CS, Lee WY, HWAHAK KONGHAK, 31(1), 62 (1993)
Kim SH, Cho SM, Yoon KJ, Korean J. Chem. Eng., 14(1), 69 (1997)
Kim SC, Sunwoo CS, Yu EY, Korean J. Chem. Eng., 7(4), 279 (1990)
Kim SC, Yu EY, HWAHAK KONGHAK, 28(5), 536 (1990)
Lee JS, Oyama ST, Korean J. Chem. Eng., 6(1), 54 (1989)
Lee JS, Oyama ST, Catal. Rev.-Sci. Eng., 30, 249 (1988)
Maitra AM, Appl. Catal. A: Gen., 104, 11 (1993)
Morgan WE, van Wazer JR, Stec WJ, J. Am. Chem. Soc., 95, 751 (1973)
Segawa K, Kurusu Y, Kinoshita M, "Catalysis by Acids and Bases," Imelik, B., ed., Elsevier Science Publishers, Amsterdam, B.V., 183 (1985)
Segawa K, Kurusu Y, Nakajima Y, Kinoshita M, J. Catal., 94, 491 (1985)
Wagner CD, Riggs WM, Davis LE, Moulder JF, Mullenberg GE, "Handbook of X-ray Photoelectron Spectroscopy," Perkin-Elmer Corp., Eden Prairie, Minnesota (1979)
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)
Baeck SH, Chung JS, Lee WY, HWAHAK KONGHAK, 36(3), 429 (1998)
Briggs D, Seah MP, "Practical Surface Analysis," 2nd ed., Wiley, Appendix 5, Chichester, 1 (1990)
Chang JS, Park SE, Lee YK, HWAHAK KONGHAK, 27(3), 323 (1989)
Cho W, Baek Y, Pang H, Kim YC, Korean J. Chem. Eng., 15(5), 500 (1998)
Clearfield A, Landis AL, Medina AS, Troup JM, J. Inorg. Nucl. Chem., 35, 1099 (1973)
Guo XM, Hidajat K, Ching CB, Korean J. Chem. Eng., 15(5), 469 (1998)
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 CS, Lee WY, HWAHAK KONGHAK, 31(1), 62 (1993)
Kim SH, Cho SM, Yoon KJ, Korean J. Chem. Eng., 14(1), 69 (1997)
Kim SC, Sunwoo CS, Yu EY, Korean J. Chem. Eng., 7(4), 279 (1990)
Kim SC, Yu EY, HWAHAK KONGHAK, 28(5), 536 (1990)
Lee JS, Oyama ST, Korean J. Chem. Eng., 6(1), 54 (1989)
Lee JS, Oyama ST, Catal. Rev.-Sci. Eng., 30, 249 (1988)
Maitra AM, Appl. Catal. A: Gen., 104, 11 (1993)
Morgan WE, van Wazer JR, Stec WJ, J. Am. Chem. Soc., 95, 751 (1973)
Segawa K, Kurusu Y, Kinoshita M, "Catalysis by Acids and Bases," Imelik, B., ed., Elsevier Science Publishers, Amsterdam, B.V., 183 (1985)
Segawa K, Kurusu Y, Nakajima Y, Kinoshita M, J. Catal., 94, 491 (1985)
Wagner CD, Riggs WM, Davis LE, Moulder JF, Mullenberg GE, "Handbook of X-ray Photoelectron Spectroscopy," Perkin-Elmer Corp., Eden Prairie, Minnesota (1979)
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)