MODELING STUDY OF THE POTENTIAL IMPORTANCE OF HETEROGENEOUS SURFACE REACTIONS FOR NOx TRANSFORMATIONS IN PLUMES

1984 ◽  
pp. 2753-2760
Author(s):  
G.M. SVERDRUP ◽  
ø. Hov
Keyword(s):  
Surface Reactions ◽  
Heterogeneous Surface ◽  
Potential Importance ◽  
Modeling Study

scholarly journals Formation of HCN+ in heterogeneous surface reactions

2015 ◽  
Vol 635 (3) ◽  
pp. 032019
Author(s):  
Martina Harnisch ◽  
Nikolaus Weinberger ◽  
Paul Scheier ◽  
Zdenek Herman
Keyword(s):  
Surface Reactions ◽  
Heterogeneous Surface

Particle-beam experiment to study heterogeneous surface reactions relevant to plasma-assisted thin film growth and etching

2003 ◽  
Vol 74 (12) ◽  
pp. 5123-5136 ◽  
Author(s):  
Wolfgang Jacob ◽  
Christian Hopf ◽  
Achim von Keudell ◽  
Matthias Meier ◽  
Thomas Schwarz-Selinger
Keyword(s):  
Thin Film ◽  
Film Growth ◽  
Surface Reactions ◽  
Particle Beam ◽  
Heterogeneous Surface ◽  
Thin Film Growth ◽  
Beam Experiment

Effect of heat and mass transfer coefficients on the performance of automotive catalytic converters

2003 ◽  
Vol 4 (2) ◽  
pp. 129-141 ◽  
Author(s):  
T Shamim
Keyword(s):  
Mass Transfer ◽  
Heat And Mass Transfer ◽  
Surface Reactions ◽  
Heterogeneous Surface ◽  
Catalytic Converters ◽  
Transfer Coefficients ◽  
Mass Transfer Coefficients ◽  
Solid Phases ◽  
Automotive Catalytic Converters

This paper numerically investigates the role of heat and mass transfer coefficients on the performance of automotive catalytic converters, which are employed to reduce engine exhaust emissions. The pollutant conversion performance of a converter is influenced by a number of physical and chemical processes that take place in gaseous and solid phases as the exhaust gases flow through the catalyst. A quantitative predictive understanding of these complex catalyst processes involving flow dynamics, heterogeneous surface reactions and heat and mass transport mechanisms is important in improving the converter design. The role of convective transport phenomena becomes important at high temperature when the mass transfer becomes rate-limiting to an increasing extent. The objective of the present study is to elucidate the influence of convective heat and mass transfer coefficients (mechanisms). The mathematical model considers the conservation of mass, momentum and energy in both gaseous and solid phases. In addition to the heterogeneous surface reactions, the model also takes into account the adsorption/desorption of oxygen in the catalyst during non-stoichiometric composition of air/fuel mixtures. The governing equations are solved by an implicit scheme using a successive line under a relaxation method. The converter performance under the transient conditions as simulated by the US Federal Test Procedure (US-FTP) is analysed.

A modeling study of the effect of surface reactions on methanol–air oxidation at low temperatures

2016 ◽  
Vol 164 ◽  
pp. 363-372 ◽  
Author(s):  
Jiepeng Huo ◽  
Haolin Yang ◽  
Liqiao Jiang ◽  
Xiaohan Wang ◽  
Daiqing Zhao
Keyword(s):  
Low Temperatures ◽  
Surface Reactions ◽  
Air Oxidation ◽  
Effect Of Surface ◽  
Modeling Study
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