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Received May 15, 2011
Accepted July 28, 2011
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Intrinsic kinetics of the Fischer-Tropsch synthesis over an impregnated cobalt-potassium catalyst
Hossein Atashi1†
Mohsen Mansouri1 2
Seyyed Hossein Hosseini2
Mohammad Khorram1
Ali Akbar Mirzaei3
Masoud Karimi1
Ghobad Mansouri4
1Department of Chemical Engineering, University of Sistan & Baluchestan, Zahedan 98164-161, Iran 2Department of Chemical Engineering, University of Ilam, Ilam 69315-516, Iran 3Department of Chemistry, University of Sistan & Baluchestan, Zahedan 98164-161, Iran 4Department of Chemistry, Islamic Azad University (Branch of Kermanshah), Kermanshah 6718997551, Iran
h.ateshi@hamoon.usb.ac.ir
Korean Journal of Chemical Engineering, March 2012, 29(3), 304-309(6), 10.1007/s11814-011-0189-z
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Abstract
The optimal amount of 15 wt%Co/10 wt%K/Al2O3 catalyst was prepared using the impregnation technique in order to study the kinetics of the Fischer-Tropsch synthesis. The rate of synthesis was measured in a fixed-bed micro reactor with H2/CO feed ratio of 1-3 and space velocity in the range of 2,700-5,200 h^(-1) under reactor pressure of 8 bar and a temperature range of 210-240℃ . The experimental data were best fitted by a Langmuir-Hinshelwood-Hougen-Watson (LHHW) approach rate in the form of -rCO=(k2K1PCOPH2)/(1+K1PCO). Furthermore, the data were fitted fairly well by a power law equation in the form of -rCO=kPCO 1.32PH21.42. The activation energies for LHHW approach model and power law equation were obtained as 138.5 kJ/mol and 87.39 kJ/mol, respectively.
Keywords
References
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Kim CU, Kim YS, Chae HJ, Jeong KE, Jeong SY, Jun KW, Lee KY, Korean J. Chem. Eng., 27(3), 777 (2010)
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Pour AN, Zamani Y, Tavasoli A, Shahri SMK, Taheri SA, Fuel., 87, 2004 (2008)
Jeon JK, Kim CJ, Park YK, Ihm SK, Korean J. Chem. Eng., 21(2), 365 (2004)
Pour AN, Shahri SMK, Bozorgzadeh HR, Zamani Y, Tavasoli A, Marvast MA, Appl. Catal. A: Gen., 348(2), 201 (2008)
Yang Y, Xiang HW, Xu YY, Bai L, Li YW, Appl. Catal. A: Gen., 266(2), 181 (2004)
Raje AP, O'Brien RJ, Davis BH, J. Catal., 180(1), 36 (1998)
Iglesia E, Reyes SC, Soled SL, in: Computer-Aided Design of Catalysts, E. R. Becker, et al. Eds., Dekker, New York (1993)
Sarup B, Wojciechowski BW, Can. J. Chem. Eng., 74, 62 (1989)
Yates IC, Sattereld CN, Energy and Fuels., 5, 168 (1991)
Yang CH, Massoth FE, Oblad AG, Adv. Chem. Ser., 178, 35 (1979)
Anderson RB, in: Catalysis, Emmett PH Ed., Reinhold, New York (1956)
Brotz W, Z. Elektrochem., 5, 301 (1949)
Botes FG, van Dyk B, McGregor C, Ind. Eng. Chem. Res., 48(23), 10439 (2009)
Irankhah A, Haghtalab A, Farahani EV, Sadaghianizadeh K, J. Nat. Gas Chem., 16, 115 (2007)
Zennaro R, Tagliabue M, Bartholomew CH, Catal. Today, 58(4), 309 (2000)
Herington EFG, Chem. Ind., 65, 346 (1946)
Lox ES, Marin GB, De Graeve E, Bussier P, Appl. Catal. A., 40, 197 (1988)
Van der Laan GP, Beenackers AACM, Catal. Rev.-Sci. Eng., 41(3-4), 255 (1999)
Wang YN, Ma WP, Lu YJ, Yang J, Xu YY, Xiang HW, Zha YL, Zhang BJ, Fuel., 82, 195 (2003)
Mears DE, in: Chemical Reaction Engineering II, H. M. Hulburt Ed., ACS Monograph, Washington (1974)
Mollavali M, Yaripour F, Atashi H, Sahebdelfar S, Ind. Eng. Chem. Res., 47(9), 3265 (2008)
Ponec V, Van Barnevald WA, Ind. Eng. Chem. Prod. Res. Dev., 18, 268 (1979)
Christman K, Scober O, Ertl G, Neumann M, J. Chem. Phys., 60, 4719 (1974)
