Investigation on Multi-Load Reaction Characteristics and Field Synergy of a Diesel Engine SCR System Based on an Eley-Rideal and Langmuir-Hinshelwood Dual-Mechanism Coupled Model.
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| Title: | Investigation on Multi-Load Reaction Characteristics and Field Synergy of a Diesel Engine SCR System Based on an Eley-Rideal and Langmuir-Hinshelwood Dual-Mechanism Coupled Model. |
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| Authors: | Nian, Muxin1 (AUTHOR), Liao, Jingyang1,2 (AUTHOR), Zhong, Weihuang1,2 (AUTHOR), Zheng, Linfeng1,2 (AUTHOR), Luo, Shengfeng1 (AUTHOR), Zhang, Haichuan1 (AUTHOR) zhanghaichuan@sztu.edu.cn |
| Source: | Energies (19961073). Dec2025, Vol. 18 Issue 24, p6571. 26p. |
| Subjects: | Catalytic reduction, Reaction mechanisms (Chemistry), Abatement (Atmospheric chemistry), Statistical models, Temperature distribution, Catalysts |
| Abstract: | The selective catalytic reduction (SCR) system is a key component for addressing NOx emissions from internal combustion engines. To resolve the issues of modeling distortion in SCR systems and the difficulty in characterizing the local reaction mechanism, a multi-dimensional SCR reaction model based on the coupling of Eley-Rideal (E-R) and Langmuir-Hinshelwood (L-H) dual mechanisms was established and conducted by experiment. The SCR catalytic characteristics and the dual-mechanism reaction process were systematically investigated. Additionally, based on the combined analysis of species concentration distribution coupled with temperature characteristics, a calculation method for the synergy of concentration-temperature fields was developed, and the synergistic characteristics of the concentration-temperature fields were explored. The results showed that high load accelerated the light-off speed, but this effect was counteracted by the negative impact of high flow rate. A strong negative correlation was maintained between temperature and NOx concentration across the full load range, and the axial consistency increased with load increasing. The results provide important theoretical support for the mechanism analysis of diesel engine SCR reactions and the optimization of thermal management. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | The selective catalytic reduction (SCR) system is a key component for addressing NOx emissions from internal combustion engines. To resolve the issues of modeling distortion in SCR systems and the difficulty in characterizing the local reaction mechanism, a multi-dimensional SCR reaction model based on the coupling of Eley-Rideal (E-R) and Langmuir-Hinshelwood (L-H) dual mechanisms was established and conducted by experiment. The SCR catalytic characteristics and the dual-mechanism reaction process were systematically investigated. Additionally, based on the combined analysis of species concentration distribution coupled with temperature characteristics, a calculation method for the synergy of concentration-temperature fields was developed, and the synergistic characteristics of the concentration-temperature fields were explored. The results showed that high load accelerated the light-off speed, but this effect was counteracted by the negative impact of high flow rate. A strong negative correlation was maintained between temperature and NOx concentration across the full load range, and the axial consistency increased with load increasing. The results provide important theoretical support for the mechanism analysis of diesel engine SCR reactions and the optimization of thermal management. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 19961073 |
| DOI: | 10.3390/en18246571 |
