Reversing flow catalytic converter for a natural gas/diesel dual fuel engine

Abstract An experimental and modelling study was performed for a reverse flow catalytic converter attached to a natural gas/diesel dual fuel engine. The catalytic converter had a segmented ceramic monolith honeycomb substrate and a catalytic washcoat containing a predominantly palladium catalyst. A one-dimensional single channel model was used to simulate the operation of the converter. The kinetics of the CO and methane oxidation followed first-order behaviour. The activation energy for the oxidation of methane showed a change with temperature, dropping from a value of 129 to 35 kJ / mol at a temperature of 874 K . The reverse flow converter was able to achieve high reactor temperature under conditions of low inlet gas temperature, provided that the initial reactor temperature was sufficiently high.

[1]  R. Farrauto,et al.  Monolithic diesel oxidation catalysts , 1996 .

[2]  Naoto Miyoshi,et al.  Development of New Concept Three-Way Catalyst for Automotive Lean-Burn Engines , 1995 .

[3]  Robert J. Farrauto,et al.  Palladium catalyst performance for methane emissions abatement from lean burn natural gas vehicles , 1997 .

[4]  Robert E. Hayes,et al.  Experimental and Modelling Study of Variable Cycle Time for a Reversing Flow Catalytic Converter for Natural Gas/Diesel Dual Fuel Engines , 2000 .

[5]  S. Kolaczkowski,et al.  Catalytic Combustion of Methane in a Monolith Reactor: Heat and Mass Transfer Under Laminar Flow and Pseudo-Steady-State Reaction Conditions , 1996 .

[6]  M. Gambino,et al.  Carbonyl compounds and PAH emissions from CNG heavy-duty engine , 1993 .

[7]  Ryozo Echigo,et al.  Superadiabatic combustion in a porous medium , 1993 .

[8]  Masatoshi Shimoda,et al.  The application of diesel oxidation catalysts to heavy duty diesel engines in Japan , 1996 .

[9]  Robert E. Hayes,et al.  Finite-element model for a catalytic monolith reactor , 1992 .

[10]  A. Unich,et al.  COMPARISON BETWEEN LEAN-BURN AND STOICHIOMETRIC TECHNOLOGIES FOR CNG HEAVY-DUTY ENGINES , 1995 .

[11]  Robert E. Hayes,et al.  Diffusion limitation effects in the washcoat of a catalytic monolith reactor , 1996 .

[12]  J. Clerc,et al.  Catalytic diesel exhaust aftertreatment , 1996 .

[13]  J. P. Leclerc,et al.  Modeling Catalytic Monoliths for Automobile Emission Control , 1992 .

[14]  S. Oh,et al.  Methane oxidation over alumina-supported noble metal catalysts with and without cerium additives , 1991 .

[15]  H. W. Bräuer,et al.  Stofftransport bei Wandreaktion im Einlaufgebiet eines Strömungsrohres , 1966 .

[16]  E. J. Bissett,et al.  Mathematical Modeling of Electrically Heated Monolith Converters: Analysis of Design Aspects and Heating Strategy , 1994 .

[17]  G. Graham,et al.  Why Rhodium in Automotive Three-Way Catalysts? , 1994 .

[18]  R. Hayes,et al.  Evaluating the effective diffusivity of methane in the washcoat of a honeycomb monolith , 2000 .

[19]  Ghazi A. Karim,et al.  An Examination of Some Measures for Improving the Performance of Gas Fuelled Diesel Engines at Light Load , 1991 .

[20]  Ming Zheng,et al.  Transient simulation of a catalytic converter for a dual fuel engine , 2000 .

[21]  Byung-Chul Choi,et al.  Unburned fuel and formaldehyde purification characteristics of catalytic converters for natural gas fueled automotive engine , 1991 .

[22]  C. F. Cullis,et al.  Oxidation of methane over supported precious metal catalysts , 1983 .

[23]  John B. Heywood,et al.  Internal combustion engine fundamentals , 1988 .

[24]  R. P. M. Guit,et al.  The Selective Catalytic Reduction of NOx in a Reverse Flow Reactor: A Quick Design Procedure , 1993 .

[25]  H. Viljoen,et al.  Modeling of a monolithic catalyst with reciprocating flow , 1995 .

[26]  R. W. Bittner,et al.  Catalytic Control of NOx, CO, and NMHC Emissions From Stationary Diesel and Dual-Fuel Engines , 1992 .

[27]  Ali Cinar,et al.  Forced periodic operation of tubular reactors , 1994 .

[28]  Paul Zelenka,et al.  Worldwide diesel emission standards, current experiences and future needs , 1996 .

[29]  R. E. Hayes,et al.  Introduction to Catalytic Combustion , 1998 .

[30]  Robert E. Hayes,et al.  MASS AND HEAT TRANSFER EFFECTS IN CATALYTIC MONOLITH REACTORS , 1994 .

[31]  G. Bunimovich,et al.  Reverse-Flow Operation in Fixed Bed Catalytic Reactors , 1996 .

[32]  Robert E. Hayes,et al.  Transient experiments and modeling of the catalytic combustion of methane in a monolith reactor , 1996 .

[33]  Christopher S. Weaver,et al.  Natural Gas Vehicles - A Review of the State of the Art , 1989 .

[34]  K. Westerterp,et al.  The catalytic oxidation of organic contaminants in a packed bed reactor , 1994 .

[35]  Rutherford Aris,et al.  On the effects of radiative heat transfer in monoliths , 1977 .

[36]  Paul Anthony Battiston,et al.  Mathematical modeling of electrically heated monolith converters : model formulation, numerical methods, and experimental verification , 1993 .

[37]  Pio Forzatti,et al.  Adequacy of lumped parameter models for SCR reactors with monolith structure , 1992 .

[38]  M. Zheng,et al.  Novel Catalytic Converter for Natural Gas Powered Diesel Engines , 1998 .