A sensitivity study of the oxidation of compressed natural gas on platinum

Handle URI:
http://hdl.handle.net/10754/563054
Title:
A sensitivity study of the oxidation of compressed natural gas on platinum
Authors:
Badra, Jihad; Masri, Assaad Rachid; Farooq, Aamir ( 0000-0001-5296-2197 )
Abstract:
This paper presents a sensitivity study for the oxidation of methane (CH4) over platinum (Pt). Some dominant reactions in the CH 4-Pt surface chemistry were identified and the rates of these reactions were subsequently modified to enhance the calculations. Initially, a range of CH4-Pt surface mechanisms available in the literature are used, along with the relevant detailed gaseous chemistry to compute the structure of premixed compressed natural gas (CNG)/air flames co-flowing around a flat, vertical, unconfined, rectangular, and platinum plate. Comparison with existing measurements of surface temperature and species concentrations revealed significant discrepancies for all mechanisms. Sensitivity analysis has identified nine key reactions which dominate the heterogeneous chemistry of methane over platinum. The rates of these reactions were modified over a reasonable range and in different combinations leading to an "optimal" mechanism for methane/air surface chemistry on platinum. The new mechanism is then used with the same flow geometry for different cases varying the temperature of the incoming mixture (Tjet), its equivalence ratio (Φ) and the Reynolds number (Re). Results from the modified surface mechanism demonstrate reasonably good agreement with the experimental data for a wide range of operating conditions. © 2013 Elsevier Ltd. All rights reserved.
KAUST Department:
Clean Combustion Research Center; Physical Sciences and Engineering (PSE) Division; Mechanical Engineering Program; Chemical Kinetics & Laser Sensors Laboratory
Publisher:
Elsevier BV
Journal:
Fuel
Issue Date:
Nov-2013
DOI:
10.1016/j.fuel.2013.06.007
Type:
Article
ISSN:
00162361
Sponsors:
The experimental part of this work was supported by the Australian Research Council. Additional funding was provided by the Clean Combustion Research Center and King Abdullah University of Science and Technology.
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Mechanical Engineering Program; Clean Combustion Research Center

Full metadata record

DC FieldValue Language
dc.contributor.authorBadra, Jihaden
dc.contributor.authorMasri, Assaad Rachiden
dc.contributor.authorFarooq, Aamiren
dc.date.accessioned2015-08-03T11:34:43Zen
dc.date.available2015-08-03T11:34:43Zen
dc.date.issued2013-11en
dc.identifier.issn00162361en
dc.identifier.doi10.1016/j.fuel.2013.06.007en
dc.identifier.urihttp://hdl.handle.net/10754/563054en
dc.description.abstractThis paper presents a sensitivity study for the oxidation of methane (CH4) over platinum (Pt). Some dominant reactions in the CH 4-Pt surface chemistry were identified and the rates of these reactions were subsequently modified to enhance the calculations. Initially, a range of CH4-Pt surface mechanisms available in the literature are used, along with the relevant detailed gaseous chemistry to compute the structure of premixed compressed natural gas (CNG)/air flames co-flowing around a flat, vertical, unconfined, rectangular, and platinum plate. Comparison with existing measurements of surface temperature and species concentrations revealed significant discrepancies for all mechanisms. Sensitivity analysis has identified nine key reactions which dominate the heterogeneous chemistry of methane over platinum. The rates of these reactions were modified over a reasonable range and in different combinations leading to an "optimal" mechanism for methane/air surface chemistry on platinum. The new mechanism is then used with the same flow geometry for different cases varying the temperature of the incoming mixture (Tjet), its equivalence ratio (Φ) and the Reynolds number (Re). Results from the modified surface mechanism demonstrate reasonably good agreement with the experimental data for a wide range of operating conditions. © 2013 Elsevier Ltd. All rights reserved.en
dc.description.sponsorshipThe experimental part of this work was supported by the Australian Research Council. Additional funding was provided by the Clean Combustion Research Center and King Abdullah University of Science and Technology.en
dc.publisherElsevier BVen
dc.subjectCatalytic combustionen
dc.subjectHomogeneous and heterogeneous reactionsen
dc.subjectSensitivity analysisen
dc.titleA sensitivity study of the oxidation of compressed natural gas on platinumen
dc.typeArticleen
dc.contributor.departmentClean Combustion Research Centeren
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentMechanical Engineering Programen
dc.contributor.departmentChemical Kinetics & Laser Sensors Laboratoryen
dc.identifier.journalFuelen
dc.contributor.institutionSchool of Aerospace, Mechanical and Mechatronic Engineering, University of Sydney, NSW 2006, Australiaen
kaust.authorBadra, Jihaden
kaust.authorFarooq, Aamiren
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