Study on Emission Characteristics and Emission Reduction Effect for Construction Machinery under Actual Operating Conditions Using a Portable Emission Measurement System (Pems)

Junhui Chen; Yuan Li; Zhongwei Meng; Xiaoqiong Feng; Junjie Wang; Honghui Zhou; Junjie Li; Jiacheng Shi; Qiang Chen; Hongle Shi; Shuxiao Wang

doi:10.3390/ijerph19159546

Study on Emission Characteristics and Emission Reduction Effect for Construction Machinery under Actual Operating Conditions Using a Portable Emission Measurement System (Pems)

Int J Environ Res Public Health. 2022 Aug 3;19(15):9546. doi: 10.3390/ijerph19159546.

Authors

Junhui Chen^{1

2

3}, Yuan Li^{2

3}, Zhongwei Meng⁴, Xiaoqiong Feng⁵, Junjie Wang², Honghui Zhou^{2

3}, Junjie Li^{2

3}, Jiacheng Shi^{2

3}, Qiang Chen², Hongle Shi², Shuxiao Wang¹

Affiliations

¹ School of Environment, Tsinghua University, Beijing 100084, China.
² Sichuan Academy of Environmental Sciences, Chengdu 620041, China.
³ Sichuan Environmental Protection Key Laboratory of Moving Source Pollution and Control, Chengdu 620041, China.
⁴ School of Energy and Power Engineering, Xihua University, Chengdu 610039, China.
⁵ Sichuan Province Environmental Protection Technology Engineering Co., Ltd., Chengdu 620041, China.

Abstract

With the acceleration of urban construction, the pollutant emission of non-road mobile machinery such as construction machinery is becoming more and more prominent. In this paper, a portable emissions measurement system (PEMS) tested the emissions of eight different types of construction machinery under actual operating conditions and was used for idling, walking, and working under the different emission reduction techniques. The results showed that the pollutant emission of construction machinery is affected by the pollutant contribution of working conditions. According to different emission reduction techniques, the diesel oxidation catalyst (DOC) can reduce carbon monoxide (CO) by 41.6-94.8% and hydrocarbon (HC) by 92.7-95.1%, catalytic diesel particulate filter (CDPF) can reduce particulate matter (PM) by 87.1-99.5%, and selective catalytic reduction (SCR) using urea as a reducing agent can reduce nitrogen oxides (NO_x) by 60.3% to 80.5%. Copper-based SCR is better than vanadium-based SCR in NO_x reduction. In addition, the study found that when the enhanced 3DOC + CDPF emission reduction technique is used on forklifts, DOC has a "low-temperature saturation effect", which will reduce the emission reduction effect of CO and THC. The use of Burner + DOC + CDPF emission reduction techniques and fuel injection heating process will increase CO's emission factors by 3.2-3.5 and 4.4-6.7 times compared with the actual operating conditions.

Keywords: PEMS; construction machinery; emission reduction effect; emission reduction techniques.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Air Pollutants* / analysis
Particulate Matter / analysis
Sydnones*
Vehicle Emissions / analysis
Vehicle Emissions / prevention & control

Substances

Air Pollutants
Particulate Matter
Sydnones
Vehicle Emissions
3-(2-phenylethyl)-4-methylsydnone

Grants and funding

This research was funded by Sichuan Province Science and Technology Plan Project, grant number 2021YFS0353, Sichuan Province Ecological Environmental Protection Science and Technology Project, grant number HB202208, and Basic scientific research business project, grant number 2021-078.