When exhaust gases traverse through the catalytic converter, SO2 molecules adsorb onto the catalyst's surface, thereby retarding the rate of chemical reactions. In the presence of abundant oxygen, adsorbed SO2 can undergo oxidation, transforming into SO3 and subsequently being released as a gas. ...
Numerical approximations are studied for a large hyperbolic system coupled to a parabolic equation and a system of algebraic equations. The equations, which all are nonlinear, describe nonviscous compressible one-dimensional gas flow in a catalytic converter. Chemical reactions within the gas are ...
but it might also be that this important part is just misunderstood. The purpose of a catalytic converter is to help clean up the exhaust gases created by the internal combustion process. Is fits right in the middle of automotive emissions, on-board diagnostics and exhaust repair, so ...
Stamatelos, "Kinetic parameter estimation by standard optimization methods in catalytic converter modeling," Chemical Engineering Communications, vol. 191, no. 11, pp. 1473-, 2004.Pontikakis, G.; Papadimitriou, C.; Stamatelos, A. Kinetic para- meter estimation by standard optimization methods in ...
A method of removing hydrogen sulfide from an emissions stream is disclosed, wherein the method includes directing the emissions stream into a hydrogen sulfide converter having a metal oxide catalyst, adsorbing the hydrogen sulfide in the emissions strea
Catalyticconvertersoftenoperateinforcednon-stationaryconditions.Thetransientopera-tionofautomotivemonolithicconvertersisforcedbytheunsteadyworkofanengine.Warm-upandlight-offcharacteristicsofthecatalyticmonolithswereinvestigatedin[10].Inmanyapplicationsvariableinletconditions(T(C)p,flowrate)areinvolvedresultinginextinctionof...
Catalytic converter in an automobile's exhaust system is made up of a finely divided platinum—iridium catalyst (i.e.forming a porous matrix)and provides a platform for exothermic chemical reaction where unburned hydrocarbons completely combust.In this paper, the steady-state solutions of a ...
reduction (chemical)Fig. 1: Light-off behavior of a green and aged catalyst with 1.5% reductant in feed under a stoichiometric condition. A low-dimensional seven ordinary differential equation (ODE) model is developed for describing the transient behavior of a three-way catalytic converter. The ...
Chemical reactorCatalysisModel reductionThree-way converterOxygen storageA seven PDE model is developed to describe the transient behavior of a TWC.Simplified chemistry is used to predict oxygen storage and overall emissions.Detailed model results and experimental data are used to validate the model.The...
Automotive Catalyst.6.1 Emissions and Regulations.6.2 The Catalytic Reactions for Pollution Abatement.6.3 The Physical Structure of the Catalytic Converter.6.4 First-Generation Converters: Oxidation Catalyst (1976-1979).6.5 NOx, CO and HC Reduction: The Second Generation: The Three Way Catalyst (1979 ...