Kinetic Modeling of C3H6 Inhibition on NO Oxidation over Pt Catalyst

Muhammad Mufti Azis; Derek Creaser

doi:10.9767/bcrec.11.1.412.27-33

DOI: https://doi.org/10.9767/bcrec.11.1.412.27-33

Kinetic Modeling of C3H6 Inhibition on NO Oxidation over Pt Catalyst

Muhammad Mufti Azis¹ , Derek Creaser²

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.

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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

In 2016: BCREC Volume 11 Issue 1 Year 2016 (April 2016)

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