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Performance of soot oxidation by O2/NO/N2 atmosphere in various catalyst species

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Abstract

Soot combustion in the presence of the commercial catalyst in the O2/NO/N2 atmosphere is studied by thermalgravimetric analysis method. The comprehensive combustion index (S) and the peak temperature (Tp) are applied to evaluate the combustion performance of soot/catalyst mixtures. Pt/Al2O3 catalyst exhibits remarkable ability in the conversion of NO into NO2 compared with CeO2. PU (Printex-U) particles are the common substitute for soot due to its similar physicochemical properties with soot. The PU/Pt mixture with 5 g ft−3 Pt content effectively promotes soot combustion by decreasing 511 °C for Tp compared with the mixtures with 2 and 10 g ft−3, while the S is not sensitive with Pt contents rather than catalyst species. The mass ratio of PU/Pt mixtures and NO concentration have great influences on soot combustion. The proper mass ratio optimizes the catalytic soot combustion applying 1:5 PU/Pt mixture in the 1600 ppm NO atmosphere. The maximum S and minimum Tp are 13.75 × 10–8 %2 min−2 °C−3 and 491 °C, respectively. The reason is that the conversion of NO to NO2 and the coefficient of NO2 utilization in soot combustion are improving greatly by Pt catalyst. The results innovate soot combustion by the commercial catalyst and O2/NO atmosphere, which promotes the optimization policy of improving diesel exhaust atmosphere and DPF (diesel particulate filter, DPF) low-temperature regeneration process.

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Acknowledgements

This work has been supported by (1) Science & Technology Department of Sichuan Province (2021YJ0332); (2) Foundation of Key Laboratory of Power Machinery and Engineering, Ministry of Education, P.R. China (202202); (3) Open Research Subject of Provincial Engineering Research Center for New Energy Vehicle Intelligent Control and Simulation Test Technology of Sichuan (XNYQ2021-001); (4) The Graduate Innovation Fund of Xihua University (YCJJ2021084); (5) Science and Technology Foundation of National Key Laboratory on Aero-Engine Aero-thermodynamics (No. 2022-JCJQ-LB-062-010).

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  1. Engineering Research Center of Ministry of Education for Intelligent Air-Ground Fusion Vehicles and Control, Xihua University, Chengdu, 610039, People’s Republic of China

    Jia Fang

  2. Key Laboratory of Power Machinery and Engineering of Ministry of Education, Shanghai Jiao Tong University, Shanghai, 200240, People’s Republic of China

    Jia Fang

  3. Vehicle Measurement, Control and Safety Key Laboratory of Sichuan Province, School of Automobile and Transportation, Xihua University, Chengdu, 610039, People’s Republic of China

    Yi Yang, Jia Fang, Zihan Qin, Ping Pu, Chengcheng Yi, Yan Yan & Zhiqiang Han

  4. Sichuan Yilan Zhichuang Technology Co., Ltd., Chengdu, 610213, People’s Republic of China

    Jia Fang

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Yang, Y., Fang, J., Qin, Z. et al. Performance of soot oxidation by O2/NO/N2 atmosphere in various catalyst species. J Therm Anal Calorim 148, 5709–5718 (2023). https://doi.org/10.1007/s10973-023-12110-7

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