Please use this identifier to cite or link to this item:
標題: Numerical Study on the Sweep Gas Flow Effects on Water-Gas Shift Reaction in Membrane Reactors
作者: 洪深造
Shen-Tsao Hong
關鍵字: Water-gas shift reaction;membrane reactor;sweep gas flow;CO conversion;H2 recovery;水氣轉化反應;膜反應器;掃氣端流場;一氧化碳轉化率;氫氣回收率
引用: [1] Schematic of Polygeneration Plant. U.S. Department of Energy (DOE). [2] Ockwig NW, Nenof TM. Membranes for hydrogen separation. Chemical Reviews 2007;107:4078-4110. [3] Mendes D, Mendes A, Madeira LM, Iulianelli A, Sousa1 JM, Basile A. The water-gas shift reaction: from conventional catalytic systems to Pd-based membrane reactors – a review. Asia-Pacific Journal of Chemical Engineering 2010;5:111-37. [4] Tosti S, Basile A, Chiappetta G, Rizzello C, Violante V. Pd–Ag membrane reactors for water gas shift reaction. Chemical Engineering Journal 2003;93:23–30. [5] Augustine AS, Ma YH, Kazantzis NK. High pressure palladium membrane reactor for the high temperature water-gas shift reaction. International Journal of Hydrogen Energy 2011;36:5350-60. [6] Sanz R, Calles JA, Alique D, Furones L. H2 production via water gas shift in a composite Pd membrane reactor prepared by the pore-plating method. International Journal of Hydrogen Energy 2014;39:4739-48. [7] Barbieri G, Brunetti A, Tricoli G, Drioli E. An innovative configuration of a Pd-based membrane reactor for the production of pure hydrogen. Journal of Power Sources 2008;182:160-67. [8] Pinacci P, Broglia M, Valli C, Capannelli G, Comite A. Evaluation of the water gas shift reaction in a palladium membrane reactor. Catalysis Today 2010;156:165-72. [9] Peters TA, Stange M, Klette H, Bredesen R. High pressure performance of thin Pd–23%Ag/stainless steel composite membranes in water gas shift gas mixtures; in?uence of dilution, mass transfer and surface effects on the hydrogen ?ux. Journal of Membrane Science 2008;316:119–27. [10] Brunetti A, Caravella A, Barbieri G, Drioli E. Simulation study of water gas shift reaction in a membrane reactor. Journal of Membrane Science 2007;306:329-40. [11] Georgis D, Lima FV, Almansoori A, Daoutidis P. Thermal management of a water?gas-shift membrane reactor for high-purity hydrogen production and carbon capture. Industrial & Engineering Chemistry Research 2014;53:7461-69. [12] Ramasubramanian K, Song M, Ho WS. Spiral-wound water-gas-shift membrane reactor for hydrogen purification. Industrial & Engineering Chemistry Research 2013; 52:8829-42. [13] Chein RY, Chen YC, Chung JN. Parametric study of membrane reactors for hydrogen production via high-temperature water gas shift reaction. International Journal of Hydrogen Energy 2013;38:2292-2305. [14] Criscuoli A, Basile A, Drioli E. An analysis of the performance of membrane reactors for the water–gas shift reaction using gas feed mixtures, Catalysis Today 2000;56:53–64. [15] Phanikumar MS, Mahajan RL. Non-Darcy natural convection in high porosity metal foams. International Journal of Heat and Mass Transfer 2002;45:3781–93. [16] Thomas A., Adams II, Paul I Barton. A dynamic two-dimensional heterogeneous model for water gas shift reactors. International Journal of Hydrogen Energy 2009;34:8877-91. [17] Barrer RM. Diffusion in and through solid. Cambridge University Press, London, 1951. [18] Criscuoli A, Basile A, Drioli E, Loiacono O. An economic feasibility study for water gas shift membrane reactor. Journal of Membrane Science 2001;181:21–27. [19] Chiappetta G, Clarizia G, Drioli E. Theoretical analysis of the effect of catalyst mass distribution and operation parameters on the performance of a Pd-based membrane reactor for water–gas shift reaction. Chemical Engineering Journal 2008;136:373-82. [20] Mar?n P, D?ez FV, Ord??ez S. Fixed bed membrane reactors for WGSR-based hydrogen production: Optimisation of modelling approaches and reactor performance. International Journal of Hydrogen Energy 2012;37:4997-5010. [21] Xue E, Keeffe MO, Ross JRH. Water-gas shift conversion using a feed with a low steam to carbon monoxide ratio and containing sulphur. Catalysis Today 1996;30:107-18.
A numerical model is built to study the effect of sweep gas flow field on the hydrogen production by water-gas shift reaction (WGSR) carried out in membrane reactor (MR). Different flow types of sweep gas flow patterns were created using various inlet/outlet port designs and various baffle plates for the permeation side of the MR. Using CO conversion and H2 recovery to characterize the reactor performance, the results showed that counter flow mode in which the reactant (CO+H2O) flows in opposite direction relative to the sweep gas flow has best performance as compared with other flow modes studied including co-flow, parallel flow, central flow, and sided flow. It was also found that the reactor performance was not improved by the introduction of baffles in the permeation side design. One of the reasons may be due to the sacrifice of membrane surface when the baffles were added. The other reason may be attributed to the enhanced convective heat transfer that reduces the WGSR reaction temperature. By varying the inlet temperature, the sweep gas flow can serve as cooling or heating fluid in the reactor. For both cooling or heating cases reactor performance could be degraded due to lower catalyst activity or reversed WGSR, respectively. The numerical results also indicated that the size of permeation side had insignificant effect on the MR performance.

Rights: 同意授權瀏覽/列印電子全文服務,2015-08-31起公開。
Appears in Collections:機械工程學系所

Files in This Item:
File Description SizeFormat Existing users please Login
nchu-103-7101061209-1.pdf3.47 MBAdobe PDFThis file is only available in the university internal network   
Show full item record

Google ScholarTM


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.