Experimental study on the emission characteristics of a non-road diesel engine equipped with different after-treatment devices

Zhang, Yunhua; Lou, Diming; Tan, Piqiang; Hu, Zhiyuan

doi:10.1007/s11356-019-05839-y

Cited by 17 publications

(7 citation statements)

References 28 publications

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“…Combined with the results of other researchers, using single or combined DOC, DPF, and SCR post-treatment systems can effectively reduce the emission of pollutants. However, the same post-treatment system has some differences in the reduction effect of pollutants, the treatment efficiency of DOC for CO in this study is lower than the results of other researchers, and the treatment efficiency of DPF for PM is slightly higher than the results of other researchers, the reason for this is that the type and ratio of catalyst used to affect the treatment efficiency of pollutants [ 34 ].…”

Section: Resultsmentioning

confidence: 74%

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

Chen

Li²,

Meng

et al. 2022

IJERPH

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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 (NOx) by 60.3% to 80.5%. Copper-based SCR is better than vanadium-based SCR in NOx 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.

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Section: Resultsmentioning

confidence: 74%

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

Chen

Li²,

Meng

et al. 2022

IJERPH

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“…Specifications of CDPFs. In order to study the effect of noble metal loadings on the aging performance of CDPF, three different CDPFs were designed based on reference and engineering application experience 8,31 , and their specifications are shown in Specifications of the vehicles. The designed CDPFs were installed on the same series buses, which were selected from a bus fleet on the same line.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…In order to study the effect of noble metal loadings on the aging performance of CDPF, three different CDPFs were designed based on reference and engineering application experience 8 , 31 , and their specifications are shown in Table 1 . The noble metal loadings of the CDPFs are 0.53, 1.71 and 1.24 g/L, and named No.1, No.2 and No.…”

Section: Experimental Methodsmentioning

confidence: 99%

Study of spatial and temporal aging characteristic of catalyzed diesel particulate filter catalytic performance used for diesel vehicle

Zhang

Lou

Tan

et al. 2020

Sci Rep

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Catalyzed diesel particulate filters (CDPFs) have been widespread used as a technically and economically feasible mean for meeting increasingly stringent emissions limits. An important issue affecting the performance of a CDPF is its aging with using time. In this paper, the effects of noble metal loadings, regions and using mileage on the aging performance of a CDPF were investigated by methods of X-ray diffraction (XRD), X-ray photoelectron spectroscopy and catalytic activity evaluation. Results showed that aging of the CDPF shifted the XRD characteristic diffraction peaks towards larger angles and increased the crystallinity, showing a slowing downward trend with the increase of the noble metal loadings. In addition, the increase of the noble metal loading would slow down the decline of Pt and Pt4+ concentration caused by aging. The characteristic temperatures of CO, C3H8 conversion and NO2 production increased after aging, and the more the noble metal loadings, the higher the range of the increase. But noticeably, excessive amounts of noble metals would not present the corresponding anti-aging properties. Specifically, the degree of aging in the inlet region was the deepest, the following is the outlet region, and the middle region was the smallest, which were also reflected in the increase range of crystallinity, characteristic temperatures of CO, C3H8 conversion and NO2 production, as well as the decrease range of Pt and Pt4+ concentrations. The increase of aging mileage reduced the size of the aggregates of the soot and ash in CDPFs, however, improved the degree of tightness between particles. Meanwhile Carbon (C) concentration in the soot and ash increased with the aging mileage.

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“…Environmental Protection Agency, 2005), the OFFROAD model developed by the California Air Resources Board (CARB) (Lewis et al, 2012;Rasdorf et al, 2010;Shao, 2016.). The modelled EFs are usually derived from engine dynamometer tests through in-lab experiments, where various test conditions with different engine parameters as well as after-treatment equipment can be conveniently implemented (Pirjola et al, 2017;Zhang et al, 2019). Rated power, machine types, and the emission standard of the estimated machine, are commonly used as parameters in non-road emission models.…”

Section: Introductionmentioning

confidence: 99%

Real-world emissions of construction mobile machines and comparison to a non-road emission model

Meng

et al. 2021

Science of The Total Environment

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Experimental study on the emission characteristics of a non-road diesel engine equipped with different after-treatment devices

Cited by 17 publications

References 28 publications

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

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

Study of spatial and temporal aging characteristic of catalyzed diesel particulate filter catalytic performance used for diesel vehicle

Real-world emissions of construction mobile machines and comparison to a non-road emission model

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