Deactivation of the Metal and Acidic Functions for Pt, Pt-Sn and Pt-Sn-K Using Physically Mixed Catalysts

Sunee Srihiranpullop; Piyasan Praserthdam; Tharathon Mongkhonsi

Korean Journal of Chemical Engineering, Vol.17, No.5, 548-552, September, 2000

DOI10.1007/BF02707164 Export Citation

Deactivation of the Metal and Acidic Functions for Pt, Pt-Sn and Pt-Sn-K Using Physically Mixed Catalysts

Sunee Srihiranpullop^†, Piyasan Praserthdam, and Tharathon Mongkhonsi

Department of Chemical Engineering, Chulalongkorn University, Bangkok, 10330, Thailand

E-mail:

The effect of K addition on the amount and dispersion of carbon deposition on metal sites and support sites was investigated on a physical mixture for hexane dehydrogenation. TPO, BET and ESR experiments were used for characterization. The K addition significantly decreases catalyst deactivation involving the amount of coke deposits and the density of carbon radicals on the metal and support sites because of ensemble and electronic effects, especially on the metal sites. Coke on the metal sites associated with carbonaceous species rich in hydrogen is less polymerized than coke on the support sites. corresponding to a more graphitic-like carbon.

Keywords:Deactivation;Pt-based Catalyst;Pt-based Catalyst Modified with Sn and/or K;Physically Mixed Catalyst

[References]

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Biswas J, Gray PG, Do DD, Appl. Catal., 32, 249 (1987)
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Guisnet M, Magnoux P, Appl. Catal., 54, 1 (1989)
Gutsze A, Roland U, Karge HG, Spillover Migration Surf. Species Catal., 417 (1997)
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Inaba M, Kintaichi Y, Hamada H, Catal. Lett., 36(3-4), 223 (1996)
Jovanovic MR, Putanov PS, Appl. Catal. A: Gen., 159(1), 1 (1997)
Kirszensztejn P, Foltynowicz Z, Wachowski L, Ind. Eng. Chem. Res., 30, 2276 (1991)
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Larsson M, Hulten M, Blekkan EA, Andersson B, J. Catal., 164(1), 44 (1996)
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Lunsford JH, Adv. Catal., 22, 265 (1972)
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Mann R, Catal. Today, 37(3), 331 (1997)
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Rostrupnielsen JR, Catal. Today, 37(3), 225 (1997)
Shum VK, Butt JB, Sachtler WMH, Appl. Catal., 11, 151 (1984)
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Trimm DL, Appl. Catal., 5, 263 (1983)
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[Referenced By]

[1] Afonso JC, Schmal M, Frety R, Fuel Process. Technol., 41(1), 13 (1994)

[2] Barbier J, Catal. Deactivation, 1 (1987)

[3] Beltramini J, Trimm DL, Appl. Catal., 32, 71 (1987)

[4] Biswas J, Bickle GM, Gray PG, Do DD, Barbier J, Catal. Rev.-Sci. Eng., 30(2), 161 (1988)

[5] Biswas J, Gray PG, Do DD, Appl. Catal., 32, 249 (1987)

[6] Bond GC, "Heterogeneous Catalysis: Principles and Application," Clarendon Press, Oxford (1987)

[7] Butt JB, Peterson EE, "Activation Deactivation and Poisoning of Catalysts," Academic Press Inc. (1988)

[8] Cortright RD, Dumesic JA, J. Catal., 157(2), 576 (1995)

[9] Guisnet M, Magnoux P, Appl. Catal., 54, 1 (1989)

[10] Gutsze A, Roland U, Karge HG, Spillover Migration Surf. Species Catal., 417 (1997)

[11] Hill JM, Cortright RD, Dumesic JA, Appl. Catal. A: Gen., 168(1), 9 (1998)

[12] Inaba M, Kintaichi Y, Hamada H, Catal. Lett., 36(3-4), 223 (1996)

[13] Jovanovic MR, Putanov PS, Appl. Catal. A: Gen., 159(1), 1 (1997)

[14] Kirszensztejn P, Foltynowicz Z, Wachowski L, Ind. Eng. Chem. Res., 30, 2276 (1991)

[15] Lange JP, Gutsze A, Appl. Catal., 45, 345 (1988)

[16] Lange JP, Gutsze A, Karge HG, J. Catal., 114, 136 (1988)

[17] Lange JP, Gutsze A, Karge HG, J. Catal., 114, 144 (1988)

[18] Larsson M, Hulten M, Blekkan EA, Andersson B, J. Catal., 164(1), 44 (1996)

[19] Lietz G, Volter J, Appl. Catal., 13, 77 (1984)

[20] Liwu L, Tao Z, Jingling Z, Zhusheng X, Appl. Catal., 67, 11 (1990)

[21] Lunsford JH, Adv. Catal., 22, 265 (1972)

[22] Macleod N, Fryer JR, Stirling D, Webb G, Catal. Today, 46(1), 37 (1998)

[23] Mann R, Catal. Today, 37(3), 331 (1997)

[24] Padro CL, de Miguel SR, Castro AA, Scelza OA, Catalyst Deactivation, 191 (1997)

[25] Rostrupnielsen JR, Catal. Today, 37(3), 225 (1997)

[26] Shum VK, Butt JB, Sachtler WMH, Appl. Catal., 11, 151 (1984)

[27] Tao Z, Jingling Z, Liwu L, Catal. Deactivation, 143 (1991)

[28] Trimm DL, Appl. Catal., 5, 263 (1983)

[29] Trimm DL, Catal. Today, 49(1-3), 3 (1999)

[30] Warlz JE, Bolton JR, "Electron Spin Resonance: Elementary Theory and Practical Applications," Chapman and Hall Ltd., New York (1972)