Dehydrogenation of isobutane over Sn/Pt/Na-ZSM-5 catalysts: The effect of SiO2/Al2O3 ratio, amount and distribution of Pt nanoparticles on the catalytic behavior

Sedigheh Vaezifar; Hossein Faghihian; Mahdi Kamali

Korean Journal of Chemical Engineering, Vol.28, No.2, 370-377, February, 2011

DOI10.1007/s11814-010-0369-2 Export Citation

Dehydrogenation of isobutane over Sn/Pt/Na-ZSM-5 catalysts: The effect of SiO2/Al2O3 ratio, amount and distribution of Pt nanoparticles on the catalytic behavior

Sedigheh Vaezifar^{1, 2}, Hossein Faghihian³, and Mahdi Kamali^{4, 5, †}

¹Biomaterials Group, Department of Materials Engineering, Isfahan University of Technology, Isfahan, I. R. Iran
²Fadak Chemical Company, Isfahan Science & Technology Town (ISTT), Isfahan, I. R. Iran
³Department of Chemistry, Islamic Azad University, Shahreza Branch, Isfahan, I. R. Iran
⁴Chemical Processes Research Department, Engineering Research Center, University of Isfahan, Isfahan, I. R. Iran
⁵Faculty of Advanced Sciences & Technologies, University of Isfahan, Isfahan 81746-73441, I. R. Iran

E-mail:

Sn/Pt/Na-ZSM-5 was used as catalyst for the dehydrogenation of isobutane, and the effect of SiO2/Al2O3 ratio and the dispersion of Pt nanoparticles on the conversion and product selectivity were studied under atmospheric pressure at 848 K. The catalysts were characterized by various techniques such as H2 chemisorption, TEM, SEM, EDX, XRD, FT-IR, TG/DTG, elemental analysis by XRF and ICP techniques. Higher dispersion of Pt nanoparticles in the catalyst with SiO2/Al2O3 ratio of 40 resulted in higher selectivity for isobutene.

Keywords:Na-ZSM-5;SiO2/Al2O3 Ratio;Bimetallic Catalysts;Pt/Sn Nanoparticles;Dehydrogenation of Isobutane

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[1] Box EO, Drehman LE, Farha F, German Patent, 2,127,353 (1970)

[2] Olbrich ME, McKay DL, Montgomery DP, US Patent, 4,926,005 (1989)

[3] Wilhelm F, Dutch Patent, 2,164,295 (1972)

[4] Wihelm FC, US Patent, 3,755,480 (1973)

[5] Resasco DE, Haller GL, Catal., 11, 379 (1994)

[6] Hutson Jr. T, McCarthy WC, in Handbook of petroleum refining processes, Meyers RA Eds., McGraw-Hill, London (1986)

[7] Pujado PR, Vora BV, Hydrocarbon Process, March 65 (1990)

[8] Hornaday GF, Ferrell FM, Mills GA, Adv. Petrol. Chem.Refining., 4, 451 (1961)

[9] Srihiranpullop S, Praserthdam P, Korean J. Chem. Eng., 20(6), 1017 (2003)

[10] William CBJ, Kenneth LR, US Patent, 4,966,880 (1990)

[11] Robert GW, US Patent, 5,609,751 (1997)

[12] John MG, John WH, US Patent, 5,516,741 (1996)

[13] Tamotsu I, Hayim A, US Patent, 4,786,625 (1988)

[14] Sinfelt JH, Bimetallic catalysts: Discoveries, concepts and applications., Wiley, New York (1983)

[15] Srinivasan R, Davis BH, Platinum Met. Rev., 36, 151 (1992)

[16] Lieske H, Sarkany A, Volter J, Appl. Catal., 30, 69 (1987)

[17] Bentahar FZ, Canday JP, Catal. Today., 66, 303 (2000)

[18] Nawaz Z, Xiaoping T, Fei W, Korean J. Chem. Eng., 26(6), 1528 (2009)

[19] Pinna F, Catal. Today, 41(1-3), 129 (1998)

[20] Zhang Y, Zhou Y, Qiu A, Wang Y, Xu Y, Wu P, Catal. Commun., 7, 862 (2006)

[21] Waku T, Biscardi JA, Iglesia E, J. Catal., 222(2), 481 (2004)

[22] Zhang Y, Zhou Y, Qiu A, Wang Y, Xu Y, Wu P, Acta Phys.Chim. Sin., 22, 672 (2006)

[23] Ghiaci M, Seyedeyn-Azad F, Kia R, Mater. Res. Bull., 39, 1257 (2004)

[24] Cortright RD, Hill JM, Dumesic JA, Catal. Today, 55(3), 213 (2000)

[25] Centeno MA, Debois M, Grange P, J. Catal., 192(2), 296 (2000)

[26] Rayalu SS, Udhoji JS, Meshram SU, Naidu RR, Devotta S, Curr. Sci., 89, 2147 (2005)

[27] Stojkovic SR, Adnadjevic B, Zeolites., 6, 523 (1988)

[28] Bhattacharya A, Das J, Mitra S, Roy SK, J. Chem. Technol.Biotechnol., 54, 399 (1992)

[29] Pirngruber GD, IOP Katalyse, no. IKA 94023, 49 (1999)

[30] de Graaf J, van Dillen AJ, de Jong KP, Koningsberger DC, J. Catal., 203(2), 307 (2001)

[31] Scire S, Burgio G, Crisafulli C, Minico S, Appl. Catal. A: Gen., 274(1-2), 151 (2004)

[32] Waku T, Biscardi JA, Iglesia E, Chem. Commun., 1764 (2003)

[33] Indo French Center for the Promotion of Advanced Research, FR Patent, 2,724,926 (1996)

[34] Kaminsky MP, Froment GF, DeHertog WJ, WO Patent 93/15835 (1993)

[35] Vaezifar S, Faghihian H, Kamali M, Iran. J. Chem. & Chem.Eng., 28, 23 (2009)

[36] Berger C, Glaser R, Rakoczy RA, Weitkamp J, Micropor.Mesopor. Mater., 83, 333 (2005)

[37] Vaezifar S, Faghihian H, Kamali M, J. Iran. Chem. Res., 1, 19 (2008)