The performance of a monolithic catalytic converter of automobile exhaust gas with oscillatory feeding of CO, NO, and O2. A modeling study.

An isothermal monolithic catalytic converter of automobile exhaust gas was modelled in order to assess the effects of oscillatory feeding of CO, O2 and NO on the performance of the reactor. The influence of the temperature, frequency, and amplitude on the time average conversions was investigated. An improvement relative to the steady state conversion of 8% for CO and 30% for NO can be obtained. An explanation is given in terms of strongly changing surface coverage during cycling of the feed concentrations.

[1]  Michael B. Cutlip,et al.  Concentration forcing of catalytic surface rate processes: Part I. Isothermal carbon monoxide oxidation over supported platinum , 1979 .

[2]  James C. Schlatter,et al.  Laboratory reactor system for three-way automotive catalyst evaluation , 1983 .

[3]  G. G. Vaporciyan,et al.  Rate enhancements and quasi-periodic dynamics during forced concentration cycling of CO and O2 over supported PtSnO2 , 1988 .

[4]  B. Cho,et al.  Cyclic operation of platinum/alumina catalysts for carbon monoxide oxidation , 1986 .

[5]  Samuel P. Marin,et al.  Surface chemistry models of carbon monoxide oxidation on supported platinum catalysts , 1980 .

[6]  Kathleen C. Taylor,et al.  Behavior of automobile exhaust catalysts with cycled feedstreams , 1983 .

[7]  E. Gulari,et al.  CO oxidation of Pt/Al2O3 and Pd/ Al2O3 transient response and concentration cycling studies , 1986 .

[8]  B. Cho.  Performance of platinum/alumina catalysts in automobile engine exhaust with oscillatory air/fuel ratio , 1988 .

[9]  E. Gulari,et al.  Co oxidation on Pd/Al2O3. Transient response and rate enhancement through forced concentration cycling , 1986 .

[10]  Jeffrey A. Sell,et al.  Dynamic behavior of automotive catalysts. 2. Carbon monoxide conversion under transient air fuel ratio conditions , 1983 .

[11]  D. T. Lynch,et al.  CO oxidation on Pt : variable phasing of inputs during forced composition cycling , 1990 .

[12]  D. W. Goodman,et al.  Comparative kinetic studies of CO$z.sbnd;O2 and CO$z.sbnd;NO reactions over single crystal and supported rhodium catalysts , 1986 .