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Sawatmongkhon B, Promhuad P, Thaisruang T, Theinnoi K, Sittichompoo S, Wongchang T, Sukjit E. Kinetic Analysis of Devolatilized Diesel-Soot Oxidation Catalyzed by Ag/Al 2O 3 and Ag/CeO 2 Using Isoconversional and Master-Plots Techniques. ACS OMEGA 2023; 8:29437-29447. [PMID: 37599922 PMCID: PMC10433343 DOI: 10.1021/acsomega.3c02971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2023] [Accepted: 07/20/2023] [Indexed: 08/22/2023]
Abstract
This work presented the kinetic analysis of devolatilized diesel-soot combustion accelerated by Ag/Al2O3 and Ag/CeO2 catalysts. Isoconversional and master-plots techniques were employed to estimate activation energy and identify the reaction model. The apparent activation energy of uncatalyzed soot oxidation was 101.85 kJ/mol, and it was reduced to 61.85 and 82.78 kJ/mol for the combustion catalyzed by Ag/Al2O3 and Ag/CeO2, respectively. The reaction-order model, f(α) = (1- α)n, with n of 1.4, 1, and 1 showed the best fit for the uncatalyzed soot oxidation and soot oxidation catalyzed by Ag/Al2O3 and Ag/CeO2, respectively. The proposed single-step reaction models were quite capable of reproducing experiments for the uncatalyzed soot oxidation and soot oxidation catalyzed by Ag/CeO2. In the presence of Ag/Al2O3, the oxidation rate at the first 20% of conversion was faster than the 1st-order reaction reflecting that the soot was rapidly oxidized by highly active species generated by Ag/Al2O3. The oxidation of the remaining soot closely followed the 1st-order reaction mechanism.
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Affiliation(s)
- Boonlue Sawatmongkhon
- College
of Industrial Technology, King Mongkut’s
University of Technology North Bangkok, 1518 Pracharat 1 Road, Wongsawang, Bangsue, Bangkok 10800, Thailand
- Research
Centre for Combustion Technology and Alternative Energy (CTAE), Science
and Technology Research Institute, King
Mongkut’s University of Technology North Bangkok, Bangkok 10800, Thailand
| | - Punya Promhuad
- College
of Industrial Technology, King Mongkut’s
University of Technology North Bangkok, 1518 Pracharat 1 Road, Wongsawang, Bangsue, Bangkok 10800, Thailand
| | - Thanawat Thaisruang
- College
of Industrial Technology, King Mongkut’s
University of Technology North Bangkok, 1518 Pracharat 1 Road, Wongsawang, Bangsue, Bangkok 10800, Thailand
| | - Kampanart Theinnoi
- College
of Industrial Technology, King Mongkut’s
University of Technology North Bangkok, 1518 Pracharat 1 Road, Wongsawang, Bangsue, Bangkok 10800, Thailand
- Research
Centre for Combustion Technology and Alternative Energy (CTAE), Science
and Technology Research Institute, King
Mongkut’s University of Technology North Bangkok, Bangkok 10800, Thailand
| | - Sak Sittichompoo
- College
of Industrial Technology, King Mongkut’s
University of Technology North Bangkok, 1518 Pracharat 1 Road, Wongsawang, Bangsue, Bangkok 10800, Thailand
- Research
Centre for Combustion Technology and Alternative Energy (CTAE), Science
and Technology Research Institute, King
Mongkut’s University of Technology North Bangkok, Bangkok 10800, Thailand
| | - Thawatchai Wongchang
- Research
Centre for Combustion Technology and Alternative Energy (CTAE), Science
and Technology Research Institute, King
Mongkut’s University of Technology North Bangkok, Bangkok 10800, Thailand
- Department
of Mechanical and Automotive Engineering Technology, Faculty of Engineering
and Technology, King Mongkut’s University
of Technology North Bangkok (Rayong Campus), Rayong 21120, Thailand
| | - Ekarong Sukjit
- School
of Mechanical Engineering, Institute of Engineering, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
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Rational design of hierarchically micrometer scaled macro-mesoporous ceria-zirconia composites for enhancing diesel soot catalytic combustion performance. MOLECULAR CATALYSIS 2023. [DOI: 10.1016/j.mcat.2022.112825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Yang Y, Fang J, Meng Z, Pu P, Zhang Q, Yi C, Pan S, Li Y. Catalytic activity and influence factors of Mn-Ce mixed oxides by hydrothermal method on diesel soot combustion. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112334] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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