Exhaust catalysis

G. B. Fisher and co-workers. The Kole of Ceria in Automotive Exhaust Catalysis and OBD-II Catalyst Monitoring, SAE 931034, Society of Automotive Engineers, Warrendale, Pa., 1993. 

The reduction of NO by propene is of great importance in automotive exhaust catalysis. 

The ultimate direct utilization of electrochemical promotion in commercial reactors (in the chemical industry and in automotive exhaust catalysis) will depend on several technical and economical factors6 which are intimately related to the following technical considerations and problems ... 

Another interesting case - which immediately illustrates how opportunistic the concept of reaction orders for catalytic reactions may be - is that of CO oxidation, an important subreaction in automotive exhaust catalysis ... 

CO oxidation, an important step in automotive exhaust catalysis, is relatively simple and has been the subject of numerous fundamental studies. The reaction is catalyzed by noble metals such as platinum, palladium, rhodium, iridium, and even by gold, provided the gold particles are very small. We will assume that the oxidation on such catalysts proceeds through a mechanism in which adsorbed CO, O and CO2 are equilibrated with the gas phase, i.e. that we can use the quasi-equilibrium approximation. 

Marin GB, Hoebink JHBJ. Kinetic modeling of automotive exhaust catalysis. Cattech 1997 2 137-148. 

The dissociation of NO is a crucial elementary step in the mechanism of NO reduction by CO in automotive exhaust catalysis. The overall reaction here is ... 

P.L. Silveston, Automotive exhaust catalysis under periodic operation. Catalysis Today 25 175 (1995). 

Bagot PA (2004) Fundamental surface science studies of automobile exhaust catalysis. 1 Mat Sci Technol 20 679... 

In Section 2.5 the lambda parameter has been described, i.e., the dimensionless air-to-fuel ratio parameter that controls exhaust catalysis chemistry to a significant extent. 

An effort has been made in this work to evaluate the utility of surface parameters determined in UHV surface science experiments for understanding the high pressure kinetics of certain catalytic reactions. We have chosen two test reactions of considerable significance in automotive exhaust catalysis,... 

Transition metal carbides (mainly of W and Mo) have been shown to be effective catalysts in some chemical reactions that are usually catalyzed by noble metals such as Pt and Pd (ref.1). Their remarkable physical properties added to lower cost and better availability could make them good candidates for substitute materials to noble metals in automobile exhaust catalysis. Hence, for this purpose, we have prepared several catalysts of tungsten carbide and W,Mo mixed carbides supported on y alumina with different Mo/W atom ratios. The surface composition has been studied by XPS while the quantitative determination of catalytic sites has been obtained by selective chemisorption of hydrogen and of carbon monoxide. The catalytic performances of these catalysts have been evaluated in the simultaneous conversion of carbon monoxide, nitric oxide and propane from a synthetic exhaust gas. 

Barbier Jr, J., and D. Duprez, 1995, Reactivity of steam in exhaust catalysis. Part II. Sintering and regeneration of Rh and PtRh catalysts in propane oxidation, in Catalysis and Automotive Pollution Control III, eds A. Frennet and J.-M. Bastin (Elsevier, Amsterdam) pp. 73-84. 

A NOVEL THRIFTED PALLADIUM-ZINC CATALYST SUPPORTED ON CERIA STABILISED ZIRCONIA FOR USE IN THREE-WAY VEHICLE EXHAUST CATALYSIS... 

In this paper we describe some recent work done by Shell Research (which is submitted to the Tripartite Group) on the effects of gasoline composition and properties on vehicle emissions. In addition the manufacture of MTBE, a relatively new gasoline component and a major feature of US reformulated gasoline is reviewed. Catalysts appear to play an important role in both gasoline manufacture (illustrated for MTBE production) and gasoline end use (exhaust catalysis). 

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