A Review of Thermal Energy Management of Diesel Exhaust after-Treatment Systems Technology and Efficiency Enhancement Approaches

Gang Wu, Guoda Feng, Yuelin Li, Tao Ling, Xuejun Peng, Zhilai Su and Xiaohuan Zhao ()
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Gang Wu: College of Automotive and Mechanical Engineering, Changsha University of Science and Technology, Changsha 410114, China
Guoda Feng: College of Automotive and Mechanical Engineering, Changsha University of Science and Technology, Changsha 410114, China
Yuelin Li: College of Automotive and Mechanical Engineering, Changsha University of Science and Technology, Changsha 410114, China
Tao Ling: China Railway Wuju Group First Engineering Co., Ltd., Changsha 410114, China
Xuejun Peng: China Railway Wuju Group First Engineering Co., Ltd., Changsha 410114, China
Zhilai Su: China Railway Wuju Group First Engineering Co., Ltd., Changsha 410114, China
Xiaohuan Zhao: Energy and Electricity Research Center, International Energy College, Zhuhai Campus, Jinan University, Zhuhai 519070, China

Energies, 2024, vol. 17, issue 3, 1-32

Abstract: The DOC (diesel oxidation catalyst), DPF (diesel particulate filter), SCR (selective catalytic reduction), and ASC (ammonia slip catalyst) are widely used in diesel exhaust after-treatment systems. The thermal management of after-treatment systems using DOC, DPF, SCR, and ASC were investigated to improve the efficiency of these devices. This paper aims to identify the challenges of this topic and seek novel methods to control the temperature. Insulation methods and catalysts decrease the energy required for thermal management, which improves the efficiency of thermal management. Thermal insulation decreases the heat loss of the exhaust gas, which can reduce the after-treatment light-off time. The DOC light-off time was reduced by 75% under adiabatic conditions. A 400 W microwave can heat the DPF to the soot oxidation temperature of 873 K at a regeneration time of 150 s. An SCR burner can decrease NOx emissions by 93.5%. Electrically heated catalysts can decrease CO, HC, and NOx emissions by 80%, 80%, and 66%, respectively. Phase-change materials can control the SCR temperature with a two-thirds reduction in NOx emissions. Pt-Pd application in the catalyst can decrease the CO light-off temperature to 113 °C. Approaches of catalysts can enhance the efficiency of the after-treatment systems and reduce the energy consumption of thermal management.

Keywords: thermal management; diesel exhaust after-treatment systems; heat loss; energy consumption; efficiency of thermal management (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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