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 and Shuxiao Wang
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Junhui Chen: School of Environment, Tsinghua University, Beijing 100084, China
Yuan Li: Sichuan Academy of Environmental Sciences, Chengdu 620041, China
Zhongwei Meng: School of Energy and Power Engineering, Xihua University, Chengdu 610039, China
Xiaoqiong Feng: Sichuan Province Environmental Protection Technology Engineering Co., Ltd., Chengdu 620041, China
Junjie Wang: Sichuan Academy of Environmental Sciences, Chengdu 620041, China
Honghui Zhou: Sichuan Academy of Environmental Sciences, Chengdu 620041, China
Junjie Li: Sichuan Academy of Environmental Sciences, Chengdu 620041, China
Jiacheng Shi: Sichuan Academy of Environmental Sciences, Chengdu 620041, China
Qiang Chen: Sichuan Academy of Environmental Sciences, Chengdu 620041, China
Hongle Shi: Sichuan Academy of Environmental Sciences, Chengdu 620041, China
Shuxiao Wang: School of Environment, Tsinghua University, Beijing 100084, China

IJERPH, 2022, vol. 19, issue 15, 1-15

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: construction machinery; PEMS; emission reduction techniques; emission reduction effect (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2022
References: View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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