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基于C链分布的乙醇汽油PN排放特性分析
Analysis of PN Emission Characteristics of Ethanol Gasoline Based onC-chain Distribution
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- DOI:
- 作者:
- 王长卉1，孙运才2，郭孔鲁2
Wang Changhui 1, Sun Yuncai 2, Guo Konglu 1
- 作者单位:
- 1.滨州市主动健康研究院，山东 滨州 256600；2.山东京博新能源控股发展有限公司，山东 滨州 256000
1. Binzhou Institute of Proactive Healthcare, Binzhou 256600, China; 2. Shandong Chambroad New Energy Holding DevelopmentCo., Ltd., Binzhou 256600, China
- 关键词:
- 乙醇；PN排放；相关性；烃；碳分布
ethanol; PN emission; correlation; hydrocarbon; carbon distribution
- 摘要:
- 摘要：随着双碳政策推行，节能减排仍是当前之重。乙醇燃料在中期减排替代过程中占有举足轻重的地位。乙醇燃料组分对于GDI发动机的PN排放的影响重大。基于1款国Ⅵ发动机（未配备GPF）对不同组分的乙醇燃油进行测试分析，结果表明，气态排放中的THC排放与PN排放呈现正相关，这主要是由于未燃HC是冷凝易形成核态颗粒物，从而导致PN排放的增加；乙醇汽油中降低C7及以下碳数的链烷烃将有助减少PN排放，而C7+的链烷烃是有助于燃料燃烧和降低PN排放；降低乙醇汽油中C8+芳烃的占比将有效减少PN排放。
Abstract: With the implementation of the dual carbon policy, energy conservation and emission reduction is still the currentimportance. Ethanol fuel plays an important role in the process of medium-term emission reduction substitution. Ethanol fuelcomposition has a great influence on PN emission of GDI engine. Based on a China VI engine ( not equipped with GPF ), differentcomponents of ethanol fuel were tested and analyzed. The results show that THC emissions in gaseous emissions are positivelycorrelated with PN emissions. This is mainly due to the condensation of unburned HC, which is easy to form nuclear particles,resulting in an increase in PN emissions. The paraffins with lower carbon number of C7 and below in ethanol gasoline will helpreduce PN emissions, while the paraffins with C7+ will help fuel combustion and reduce PN emissions. The proportion of C8+aromatics in ethanol gasoline is one of the main factors affecting PN emission.