Kinetic Study of Hydroisomerization of n-Decane using Pt/SAPO-11 catalysts
DOI:
https://doi.org/10.31699/IJCPE.2018.3.2Keywords:
SAPO-11 catalyst, Isomerization, n-DecaneAbstract
The hydroisomerization of n-decane was studied on SAPO-11 catalyst. Catalyst of 0.25wt.%Pt/SAPO-11 was prepared locally and used in the present work. The hydroconversion performed in a continuous fixed-bed laboratory reaction unit. Experiments of n-decane isomerization were performed in a temperature range of 200 to 275°C,LHSV range of 0.5-2 h-1, and hydrogen to decane mole ratio of 2.1-8.2. The results show that the n-decane conversion increases with increasing temperature and decreasing LHSV , the maximum conversion 56.77 % was achieved at temperature 275°C and LHSV of 0.5 h-1. The kinetic of n-decane isomerization was also studied and the reaction was first order. The kinetic analysis also showed that the activation energy equal to 61.1137 kJ/mol.
Received on 24/06/2018
Accepted on 11/07/2018
Published on 30l09l2018
References
Gauw F.J.M., Grandell J., Santen R.A.,"The intrinsic kinetics of n-hexane isomerization catalyzed by Pt loaded solid acid catalyst", J. Catal. 206, 2002, 295-304.
Hilfman Lee, "Hydroprocessing of Hydrocarbons over Nickel, Molybdenum, and Platinum catalyst", US patent, 4175033, 1979.
Exner H., Nagy E., Fetting F., Gubicza L.,"Kinetic of hydroisomerization of n-alkane on nickel zeolite", Proc. Of 5th conference of Applied Chemistry Unit Operation Process, vol.2, 1989, 420-425.
Song X., Bai X., Wu W., Kikhtyanin O.V., Zhao A., Xiao L., Su X., Zhang J., Wei X., "The effect of palladium on the catalytic performance of Pd/SAPO-11 for n-decane hydroisomerization"., Molecular Catalysis, 433,2017,84-90.
Bokhoven J.A., Tramp M., Koningsbarger J.T., Miller and Pieters J.A.Z., Lercher J.A., Williams, Kung,"An explanation for enhanced activity for light alkane conversion in mildy steam dealuminated mordenite", J. Catal. 202, 2001, 129-140 .
Rabo J.A. and Gajda,, "Development of kinetic model of reforming reaction on zeolite", J. Catal. Kev. Sci. Eng., 31, 385, 1989.
Lawrence Tucker Kass, "Isomerization process with improved chloride recovery", United States Patent 5705730, 1998.
Zhipeng M., Liu Z., Song H., Bai P., Xing W., Yan Z., Zhao L., Zhang Z.,and Gao X., " Synthesis of hierarchical SAPO-11 for hydroisomerization reaction in refinery processes", Appl Petrochem.Res ,vol 4 (2014),351-358.
Cui X.,Liu Y. and Liu X., "Controlling acidic sites to improve hydroisomerization performance of Pt/SAPO-11 catalysts", Catal lett, 145(2015), 1464-1473.
Sastre G., Chica A., and Corma A. "On the mechanism of Alkane isomerization (Isodewaxing) with Unidirectional 10- member ring zeolites. A Molecular Dynamics and Catalytic study", Journal of catalysis 195, 2000, 227-236.
Sinha A. K. , Sivasanker S. , and Ratnasamy P., " Hydroisomerization of n-Alkanes over Pt-SAPO-11 and Pt-SAPO-31 Synthesized from Aqueous and Nonaqueous Media", Ind. Eng. Chem. Res. 37,1998, 2208-2214.
Shengzhen Zhang, Sheng-Li Chen Peng Dong, Zhiyong Ji, Junying Zhao, and Keqi Xu , "synthesis, characterization and hydroisomerization catalytic performance of nanosize SAPO-11 molecular sieves" , Catalysis letters, vol. 118,2007, p. 109-117.
Hussein Q. H. and Aljandeel H.A.," Studying Influence of Aging and Crystallization Temperature on Characteristics of SAPO-11 Catalyst Using Hydrothermal Method", 1st International Conference on Recent Trends of Engineering Sciences and Sustainability, 2017.
Masologites., George, "Method of treating a used Pt group alumina catalyst with a metal promoter", US patent, 4070306, 1987.
Chang C.D. , Princeton N.J., Jose G., Sontiesteban, David L., Stern, "Isomerization process", US patent, 6080904, 2000.
American, N. S., 1979. Standard Specifications and Operating Instructions for Glass Capillary Kinematic Viscomrters. D446-74, Deutsche Norm DIN 366 und 51372.
Zhang F., Liu Y., Shu X., Wang W. and Qin F. , " SAPO-11 molecular sieve, its synthetic method and a catalyst containing the molecular sieve", US patent, 6596156, 2003.
Meriaudeau P.,Tuan V.A., Hung L.N., Lefebvre F., and Nguyen H.P., "Zirconium-SAPO-11, The peculiar effect of zirconium addition on the catalytic properties for n-butene isomerization", J. Chem. Soc., Faraday Trans., 1997, V ol. 93 .
Chen W., Hui-Hsin Ko, Ayyamperumal Sakthival, Shing-Jong Huang, Shou-Heng Liu,An-Ya Lo, Teseng- Vhang Tsai, Shang-Bin Liu, " A solid- state NMR,FT-IR and TPD study on acid properties of sulfated and metal-promoter and sulfation treatment" , catalysis today, 116(2006), 111-120.
Zhang S., Chen S., Dong P.,Ji Z.,Zhao J. and Xu K., "synthesis, characterization and hydroisomerization catalytic performance of nanosize SAPO-11 molecular sieves" , Catalysis letters, vol. 118, p. 109-117, 2007.
Al-Hassany M., " Effect ZRO2 , WO3 additives on catalytic performance of Pt/HY zeolite compared with Pt/Γ-AL2O3 for Iraqi naphtha transformation", Journal of Enginnering, vol. 15, number 4,2009,4378-4394 .
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