首页|A methodology for structure dependent global kinetic models: Application to the selective catalytic reduction of NO by hydrocarbons
A methodology for structure dependent global kinetic models: Application to the selective catalytic reduction of NO by hydrocarbons
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NSTL
Global kinetic models capable of capturing experimentally observed features of catalytic reactions are vital in design and optimization studies. In this work, a detailed analysis of the selective catalytic reduction of NO and NO2, particularly in automotive exhaust control is undertaken. The prominent metal based catalysts for this reaction range from Pt, Au & Rh to cheaper options including Cu, Ag & Co supported on Al2O3, SiO2, and occasionally, zeolites. Here, we focus on Ag & Co supported on Al2O3 catalysts, and propose a computationally tractable kinetic model capable of capturing the observed SCR features across a range of catalyst synthesis and reactor operating conditions. In particular, the effects of metal loading on catalyst performance are closely examined. In SCR, an important aspect is the catalytic activity at higher inlet O2 concentrations. The global kinetic model proposed here is shown to predict the trends with respect to reactor temperature and inlet feed compositions (including O2), well, for both catalysts.
Global kinetic modelingNOx reductionAutomotive catalysis
Neha Yedala、Preeti Aghalayam
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Dept. of Chemical Engineering, IIT Madras, Chennai 600 036, India
NSTL
