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Kinetic Modeling of C3H6 Inhibition on NO Oxidation over Pt Catalyst

1Chemical Engineering Department, Faculty of Engineering, Gadjah Mada University, Jl. Grafika No. 2, Kampus UGM, Yogyakarta, Indonesia

2Chemical Engineering, Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Göteborg, SE-41296, Sweden

Received: 10 Nov 2015; Revised: 1 Feb 2016; Accepted: 1 Feb 2016; Published: 1 Apr 2016; Available online: 10 Mar 2016.
Open Access Copyright (c) 2016 by Authors, Published by BCREC Group under http://creativecommons.org/licenses/by-sa/4.0.

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Abstract

Exhaust after treatment for lean burn and diesel engine is a complex catalytic system that consists of a number of catalytic units. Pt/Al2O3 is often used as a model Diesel Oxidation Catalyst (DOC) that plays an important role to facilitate oxidation of NO to NO2. In the present study, we proposed a detailed kinetic model of NO oxidation as well as low temperature C3H6 inhibition to simulate temperature-programmed reaction (TPR) data for NO oxidation over Pt/Al2O3. A steady-state microkinetic model based on Langmuir-Hinshelwood mechanism for NO oxidation was proposed. In addition, low temperature C3H6 inhibition was proposed as a result of site blocking as well as surface nitrite consumption. The model can explain the experimental data well over the studied temperature range. 

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Keywords: microkinetic modeling; DOC catalyst; NO oxidation; C3H6 inhibition

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Section: The 2nd International Conference on Chemical and Material Engineering 2015
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