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| Effect of DOC+DPF system on diesel engine pollutant emission characteristics |
| LI Shunli, CAI Yixi, SHI Yunxi, LU Yirui, ZHU Kan |
| School of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China |
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Abstract Based on the diesel engine bench equipped with diesel oxidation catalyst (DOC) and diesel particulate filter (DPF), the flue gas analyzer of Testo 350XL and the engine exhaust particle size spectrometer of TSI EEPS 3090 were used to investigate NOx and particulate matter(PM) variation under different loads before and after the DOC and after the DPF. The results show that the NO2 volume fraction of φ（NO2）is increased significantly after DOC when the load is greater than 50.0%. With the increasing of engine load, NO2 volume fraction in nitrogen oxides φ（NO2/NOx）of the raw diesel engine is decreased, while the φ（NO2） and φ（NO2/NOx） of the DOC and the DPF are decreased first with latter increasing. The raw diesel engine PM emission is depended on the operation conditions of the diesel engine. The PM removal rate of DOC is 15%-30% under different loads, and the PM removal rate of DOC under 50.0% load has the highest value of 26%. The PM removal rate of DPF is exceeded 90%. The nucleated particles volume fraction after DPF is increased, while aggregated particles volume fraction is decreased.
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Received: 17 December 2021
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| ［1］ |
KOZINA A, RADICA G, NI-ETIC＇ S. Analysis of methods towards reduction of harmful pollutants from diesel engines[J]. Journal of Cleaner Production, DOI:10.1016/j.jclepro.2020.121105. ［2］中华人民共和国生态环境部. 中国移动源环境管理年报(2021)[R]. 北京：中华人民共和国生态环境部, 2021.
|
| ［3］ |
张允华,楼狄明,谭丕强, 等. DOC+CDPF对重型柴油车排放特性的影响[J]. 环境科学, 2017, 38(5):1828-1834. ZHANG Y H, LOU D M, TAN P Q, et al. Effects of DOC+CDPF on emission characteristics of heavy-duty diesel vehicle[J]. Environmental Science, 2017, 38(5): 1828-1834.（in Chinese）
|
| ［4］ |
商潭苏，魏明亮，孙平，等. Fe-FBC燃油对柴油机醛类和颗粒物排放的影响[J]. 江苏大学学报（自然科学版）, 2021, 42(2): 125-130. SHANG T S, WEI M L, SUN P, et al. Effect of Fe-FBC fuel on aldehydes and particulate matter emissions of diesel engine[J]. Journal of Jiangsu University（Natural Science Edition）, 2021, 42(2): 125-130.（in Chinese）
|
| ［5］ |
沈颖刚,廖凭皓,陈春林,等. 柴油机加装柴油机氧化催化器和催化型颗粒捕集器装置性能评定试验研究[J]. 内燃机工程, 2020, 41(4): 17-26. SHEN Y G, LIAO P H, CHEN C L, et al. Experimental study on performance evaluation of a diesel engine equipped with diesel oxidation catalytic and catalytic diesel particulate filter system[J]. Chinese Internal Combustion Engine Engineering, 2020, 41(4): 17-26.（in Chinese）
|
| ［6］ |
陈贵升，和志高，沈颖刚，等. 掺混PODE对DOC＋CDPF氧化及再生特性的影响[J]. 内燃机学报, 2020, 38(1): 64-72. CHEN G S, HE Z G, SHEN Y G, et al. Effect of blending PODE on DOC+CDPF performance of a diesel engine[J]. Transactions of CSICE, 2020, 38(1): 64-72.（in Chinese）
|
| ［7］ |
TAN P Q, ZHONG Y M, HU Z Y, et al. Size distributions, PAHs and inorganic ions of exhaust particles from a heavy duty diesel engine using B20 biodiesel with different exhaust aftertreatments[J]. Energy, 2017, 141 : 898-906.
|
| ［8］ |
SRINIVASAN A, PRICE K. Consolidation of DOC and DPF functions into a single component[J]. SAE Technical Papers, DOI: 10.4271/2019-01-0583.
|
| ［9］ |
SHUDO T, OMORI K, HIYAMA O. NOx reduction and NO2 emission characteristics in rich lean combustion of hydrogen[J]. International Journal of Hydrogen Energy, 2008, 33(17): 4689-4693.
|
| ［10］ |
JIAO P H, LI Z J, SHEN B X, et al. Research of DPF regeneration with NOx PM coupled chemical reaction[J]. Applied Thermal Engineering, 2017, 110 : 737-745.
|
| ［11］ |
林柏洋，刘旻，胡琨，等. 掺混甲烷对预混合丙烯火焰碳烟生成的影响[J]. 内燃机学报, 2021, 39(1): 61-66. LIN B Y, LIU M, HU K, et al. Effect of methane blending on soot formation in premixed propene flame[J]. Transactions of CSICE, 2021, 39(1): 61-66.（in Chinese）
|
| ［12］ |
方嘉，蒋渊，孟忠伟，等. O2 /NO2氛围下颗粒物的氧化催化特性试验[J]. 江苏大学学报（自然科学版）, 2019, 40(5): 518-523. FANG J, JIANG Y, MENG Z W, et al. Oxidation and catalytic characteristics of particulate with O2 /NO2 condition[J]. Journal of Jiangsu University（Natural Science Edition）, 2019, 40(5): 518-523.（in Chinese）
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