Modeling of a metal monolith catalytic reactor for methane steam reforming–combustion coupling

A novel metal monolith reactor for coupling methane steam reforming with catalytic combustion is proposed in this work, the metal monolith is used as a co-current heat exchanger and the catalysts are deposited on channel walls of the monolith. The transport and reaction performances of the reactor are numerically studied utilizing heterogeneous model based on the whole reactor. The influence of the operating conditions like feed gas velocity, temperature and composition are predicted to be significant and they must be carefully adjusted in order to avoid hot spots or insufficient methane conversion. To improve reactor performance, several different channel arrangements and catalyst distribution modes in the monolith are designed and simulated. It is demonstrated that reasonable reactor configuration, structure parameters and catalyst distribution can considerably enhance heat transfer and increase the methane conversion, resulting in a compact and intensified unit.

[1]  Vasant R. Choudhary,et al.  High-Temperature Catalytic Oxidative Conversion of Propane to Propylene and Ethylene Involving Coupling of Exothermic and Endothermic Reactions , 2000 .

[2]  V. Choudhary,et al.  Energy-efficient conversion of propane to propylene and ethylene over a V2O5/CeO2/SA5205 catalyst in the presence of limited oxygen , 2004 .

[3]  Steve Perry,et al.  Microchannel Process Technology for Compact Methane Steam Reforming , 2004 .

[5]  Liping Zhao,et al.  Ce1−xCuxO2−x/Al2O3/FeCrAl catalysts for catalytic combustion of methane , 2005 .

[6]  Biaohua Chen,et al.  Preparation and characterization of LaFe1−xMgxO3/Al2O3/FeCrAl: Catalytic properties in methane combustion , 2006 .

[7]  Gregory S. Jackson,et al.  Transient modeling of combined catalytic combustion/CH4 steam reforming , 2003 .

[8]  A simplified procedure for the optimal design of autothermal reactors for endothermic high-temperature reactions , 2001 .

[9]  D. Trimm,et al.  Alternative catalyst bed configurations for the autothermic conversion of methane to hydrogen , 1996 .

[10]  Shengfu Ji,et al.  Simulation of Catalytic Combustion of Methane in a Monolith Honeycomb Reactor , 2006 .

[11]  G. Froment,et al.  Methane steam reforming, methanation and water‐gas shift: I. Intrinsic kinetics , 1989 .

[12]  Milorad P. Dudukovic,et al.  Periodic operation of asymmetric bidirectional fixed-bed reactors: energy efficiency , 1997 .

[13]  David L. Trimm,et al.  Heterogeneous reactor modeling for simulation of catalytic oxidation and steam reforming of methane , 2001 .

[14]  G. Groppi,et al.  Honeycomb supports with high thermal conductivity for gas/solid chemical processes , 2005 .

[15]  X. Verykios,et al.  Development of a novel heat-integrated wall reactor for the partial oxidation of methane to synthesis gas , 1998 .

[16]  Shudong Wang,et al.  Modeling of a compact plate-fin reformer for methanol steam reforming in fuel cell systems , 2005 .

[17]  Asterios Gavriilidis,et al.  Catalytic combustion assisted methane steam reforming in a catalytic plate reactor , 2003 .

[18]  Shengfu Ji,et al.  Conceptual design and CFD simulation of a novel metal-based monolith reactor with enhanced mass transfer , 2005 .

[19]  G. Eigenberger,et al.  Analysis of a novel reverse-flow reactor concept for autothermal methane steam reforming , 2003 .

[20]  Milorad P. Dudukovic,et al.  A bidirectional fixed-bed reactor for coupling of exothermic and endothermic reactions , 1996 .

[21]  H. J. Veringa,et al.  A catalytic heat-exchanging tubular reactor for combining of high temperature exothermic and endothermic reactions , 2001 .

[22]  A. Gavriilidis,et al.  Parametric sensitivity in catalytic plate reactors with first-order endothermic-exothermic reactions , 2002 .

[23]  van M Martin Sint Annaland,et al.  A novel reverse flow reactor coupling endothermic and exothermic reactions : an experimental study , 2002 .

[24]  S. Chan,et al.  Modeling of a catalytic autothermal methane reformer for fuel cell applications , 2004 .

[25]  R. Hayes,et al.  A study of Nusselt and Sherwood numbers in a monolith reactor , 1999 .

[26]  A. Gavriilidis,et al.  Modelling of a catalytic plate reactor for dehydrogenation–combustion coupling , 2001 .

[27]  V. Choudhary,et al.  Coupling of exothermic and endothermic reactions in oxidative conversion of ethane to ethylene over alkaline earth promoted La2O3 catalysts in presence of limited O2 , 2000 .

[28]  Kenji Maruyama,et al.  Temperature profiles of alumina-supported noble metal catalysts in autothermal reforming of methane , 2004 .

[29]  Gerhart Eigenberger,et al.  Efficient reactor concepts for coupling of endothermic and exothermic reactions , 2002 .

[30]  Gerhart Eigenberger,et al.  A new reactor concept for endothermic high-temperature reactions , 1999 .

[31]  E. A. Polman,et al.  Novel Compact Steam Reformer for Fuel Cells with Heat Generation by Catalytic Combustion Augmented by Induction Heating , 1999 .

[32]  Chengyue Li,et al.  Simulation of heat transfer and hydrodynamics for metal structured packed bed , 2005 .