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Conversion of Gas-Solid Reactions of the Flat Plate Particles with Unchanged Size Using the Shrinking Core Model | ||
| Journal of Chemical and Petroleum Engineering | ||
| دوره 55، شماره 1، شهریور 2021، صفحه 33-51 اصل مقاله (1.06 M) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22059/jchpe.2020.239139.1206 | ||
| نویسندگان | ||
| Ehsan Zangooei؛ Mohammad Reza Talaghat* | ||
| Department of Chemical, Oil and Gas Engineering, Shiraz University of Technology, Shiraz, Iran | ||
| چکیده | ||
| In this paper, a mathematical model is developed to calculate the conversion and the residence time reaction for plug flow and mixed flow in the fluidized reactors filled with flat plate particles using the shrinking core model. In this modeling, the size of the particles is unchanged during the reaction. Also, the reaction rate is controlled by the gas layer resistance, the ash layer resistance, and the reaction resistance as well as the combination of them. It is also assumed that the gas diffuses from the side, whereas the effect of diffusion in the axial direction is neglected. Equations are solved by numerical methods. This paper's innovation is investigating the combination of resistances effect on the conversion of the reaction. The results for a specific time show that when the reaction rate is controlled by each of the resistances individually, the conversion rate is greater. For example when the reaction is controlled by the ash layer resistance versus when the other two resistance regimes control it. Finally, the effect of the combination of different controlling regimes on the conversion and residence time of reaction for plug flow and mixed flow of particles is studied and it is found that the overall results are similar to each other. In addition, the results that the curves for the gas film layer resistance and the chemical reaction resistance, are the same and correspond to each other. Because the equations of the conversion rate are the same. | ||
| کلیدواژهها | ||
| Flat Plate Particles؛ Reaction Conversion؛ Reaction of Solid-Fluid؛ Resistances Combination؛ Residence Time؛ Model of Shrinking Core | ||
| مراجع | ||
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Ebrahim HA, Jamshidi E. Kinetic study of zinc oxide reduction by methane. Chemical Engineering Research and Design. 2001 Jan 1;79(1):62-70. [2] Kimura S. Oxidation kinetics of polycrystalline zinc sulfide grains. AIChE journal. 1989 Feb;35(2):339-42. [3] Efthimiadis EA, Sotirchos SV. Reactivity evolution during sulfidation of porous zinc oxide. Chemical engineering science. 1993 Jan 1;48(5):829-43. [4] Delikouras EA, Perlmutter DD. Combined effects of mass transfer and inaccessible porosity in gasification reactions. AIChE journal. 1993 May;39(5):829-36. [5] Lozano-Castello D, Cazorla-Amoros D, Linares-Solano A. Powdered activated carbons and activated carbon fibers for methane storage: a comparative study. Energy & fuels. 2002 Sep 18;16(5):1321-8. [6] Bai D, Zhu JX, Jin Y, Yu Z. Simulation of FCC catalyst regeneration in a riser regenerator. Chemical Engineering Journal. 1998 Dec 2;71(2):97-109. [7] Denbigh, KG, Beverley, GSG. The Oxidation of Zinc Supplied Spheres in an Air Stream. Trans. Inst. Chem. Engr. 1962; 40: 23-34. [8] Szekely J, Evans JW, Sohn HY. Gas-Solid Reactions. Academic Press. 1976. [9] Beveridge GS, Goldie PJ. Effectiveness factors and instability in non-catalytic gas-solid reactions. The effect of solid heat capacity, Chemical Engineering Science. 1968 Aug 1;23(8):913-29. [10] SK Bhatia, DD Perlmutter, A random pore model for fluid–solid reactions. I. Isothermal, kinetic control, AIChE Journal. 1980 May;26(3):379-86. [11] Levenspiel O. Chemical reaction engineering. John Wiley & Sons;1999. [12] Rodriguez F, Revenga J, Tijero J. Study of anthraquinone reaction with sodium sulphide. The Chemical Engineering Journal and the Biochemical Engineering Journal, 1995;63:37-43. [13] Noorman S, Gallucci F, van Sint Annaland M, Kuipers JA. A theoretical investigation of CLC in packed beds. Part 1: Particle model. Chemical Engineering Journal. 2011 Feb 15;167(1):297-307. [14] Yagi S, Kunii D. Studies on combustion of carbon particles in flames and fluidized beds. InSymposium (international) on Combustion. 1955 Jan 1;5(1):231-244. [15] Levenspiel O. Chemical Reaction Engineering. John Wiley and Sons, 1962. [16] Kawasaki E, Sanscrainte, J, Walsh, J. Kinetics of Reduction of Iron Oxide with Carbon Monoxide and Hydrogen. AIChE Journal.1962; 8(1): 48-52. [17] Ishida M, Wen CY, Comparison of Kinetic and Diffusional Models for Solid-Gas Reactions. AIChE Journal. 1968 Mar;14(2):311-7. [18] Szekely J, Evans JW. A structural model for gas—solid reactions with a moving boundary. Chemical Engineering Science. 1970 Jan 1;25(6):1091-107. [19] Ramachandran PA, Smith JM. A Single Pore Model for Gas-Solid Non-Catalytic Reactions. AIChE Journal.1977; 23(3): 353-361. [20] Valipour H, Transactions C. Chemistry and Chemical Engineering. 2009;16(2):108-124. [21] Rashidi H, Ebrahim HA, Dabir B. Reduction kinetics of nickel oxide by methane as reducing agent based on thermogravimetry. Thermochimica acta. 2013 Jun 10;561:41-8. [22] Lv Z, Dang J. Mathematical modeling of the reaction of metal oxides with methane. RSC Advances. 2020;10(19):11233-43. [23] Tsinontides SC, Jackson R. The mechanics of gas fluidized beds with an interval of stable fluidization. Journal of Fluid Mechanics. 1993 Oct;255:237-74. Journal of Chemical and Petroleum Engineering 2021, 55(1): 33- 51 51 [24] Ebrahimi AA, Ebrahim HA, Jamshidi E. Solving partial differential equations of gas–solid reactions by orthogonal collocation. Computers & Chemical Engineering. 2008 Aug 22;32(8):1746-59. [25] Movagarnejad K, Sohrabi M, Kaghazchi T, Vahabzadeh F. A model for the rate of enzymatic hydrolysis of cellulose in heterogeneous solid–liquid systems. Biochemical Engineering Journal. 2000 Feb 1;4(3):197-206. | ||
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