Advances in emission control of diesel vehicles in China


Hong He , Guangyan Xu , Wenpo Shan , Yunbo Yu , Yulong Shan , Xiaodong Wu , Ye Wu , Shaojun Zhang , Liqiang He , Shijin Shuai , Hailong Pang , Xuefeng Jiang , Heng Zhang , Lei Guo , Shufen Wang , Feng-Shou Xiao , Xiangju Meng , Feng Wu , Dongwei Yao , Yan Ding , Hang Yin

DOI:10.1016/j.jes.2021.12.012

Received October 31, 2021,Revised , Accepted December 13, 2021, Available online December 30, 2021

Volume 35,2023,Pages 15-29

Diesel vehicles have caused serious environmental problems in China. Hence, the Chinese government has launched serious actions against air pollution and imposed more stringent regulations on diesel vehicle emissions in the latest China VI standard. To fulfill this stringent legislation, two major technical routes, including the exhaust gas recirculation (EGR) and high-efficiency selective catalytic reduction (SCR) routes, have been developed for diesel engines. Moreover, complicated aftertreatment technologies have also been developed, including use of a diesel oxidation catalyst (DOC) for controlling carbon monoxide (CO) and hydrocarbon (HC) emissions, diesel particulate filter (DPF) for particle mass (PM) emission control, SCR for the control of NOx emission, and an ammonia slip catalyst (ASC) for the control of unreacted NH3. Due to the stringent requirements of the China VI standard, the aftertreatment system needs to be more deeply integrated with the engine system. In the future, aftertreatment technologies will need further upgrades to fulfill the requirements of the near-zero emission target for diesel vehicles.

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