Emission Characteristics of Particulate and Gaseous Pollutants from a Light-Duty Diesel Engine with SDPF

Pi-Qiang Tan; Jia-Jun Wang; Li-Shuang Duan; Diming Lou; Zhi-Yuan Hu

doi:10.1021/acsomega.3c04884

Emission Characteristics of Particulate and Gaseous Pollutants from a Light-Duty Diesel Engine with SDPF

ACS Omega. 2023 Sep 20;8(39):36292-36301. doi: 10.1021/acsomega.3c04884. eCollection 2023 Oct 3.

Authors

Pi-Qiang Tan¹, Jia-Jun Wang¹, Li-Shuang Duan¹, Diming Lou¹, Zhi-Yuan Hu¹

Affiliation

¹ School of Automotive Studies, Tongji University, Shanghai 201804, China.

Abstract

Due to the inherent combustion characteristics of diesel engines, particulate matter (PM) and nitrogen oxides (NO_x) are the main pollutants of diesel engines. NO_x emissions under low load and low temperature are the focus of future regulation. Selective catalytic reduction coated on diesel particulate filter (SDPF) can reduce NO_x and PM emissions of diesel engines at the same time, especially improving the emission characteristics of NO_x under low load and low temperature. In this paper, a light-duty diesel engine with diesel oxidation catalyst (DOC) and SDPF was studied, and emission of particulate and gaseous pollutants of the engine before DOC, after DOC, and after SDPF was measured under 10 steady-state operating conditions. The effects of SDPF on particulate size distribution, the filtration efficiency of particulate, and the conversion efficiency of gaseous pollutants were analyzed. The results show that DOC + SDPF can trap PM with particle sizes between 10 and 23 nm by 1-2 orders of magnitude, and the conversion and filtration efficiency of DOC + SDPF for both gaseous pollutants and PM exceeds 90% under low-temperature and low-load conditions. The filtration efficiency of SDPF is 94.37% for PM and 90.36% for PN, and the conversion efficiency is 91.43% for NO_x.