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Emission characteristics and optical properties of brown carbon during combustion of pine at different ignition temperatures under high-time resolution

文献类型：期刊论文

作者Cai, Junjie3; Jiang, Hongxing3; Chen, Yingjun2,3; Li, Jun1,4; Zhang, Gan1,4
刊名FUEL
出版日期2023-12-15
卷号354页码:10
关键词Brown carbon Biomass burning High time-resolved Combustion cycle Emission characteristic
ISSN号0016-2361
DOI10.1016/j.fuel.2023.129400
英文摘要Biomass burning is a major contributor to atmospheric brown carbon (BrC). However, the properties of BrC from biomass burning can vary significantly based on combustion conditions and stages. To investigate these variations, we simulated the combustion cycle of pine at three different ignition temperatures (400, 600 and 800 degrees C) in a quartz tube furnace. Highly time-resolved samples were collected to analyze the emission and light-absorption properties of BrC during different combustion processes. Our findings revealed that the absorption emission factor at 370 nm was highest at 800 degrees C (14.96 +/- 6.15 gm(-3)) and lowest at 600 degrees C (3.48 +/- 1.05 gm(-3)). At lower combustion temperatures, we observed a higher content of low molecular weight organic compounds in BrC (OC1, OC2). Furthermore, the emission and light-absorption properties of BrC varied significantly throughout the combustion cycle, with clear bimodal distributions observed for OC, EC, and mass absorption efficiency at 365 nm at all three temperatures. The unimodal distribution of the absorption & Aring;ngstr & ouml;m exponent indicated that highly aromatic BrC molecules were mainly produced at the beginning and end of the combustion events. We also found that low volatile OC components (OC3 + OC4) had a dominant effect on the variation in MAE(365) at 400 and 600 degrees C, while high volatile OC components (OC1 + OC2) were more significant at 800 degrees C. These results suggest that the optical properties of BrC components can vary significantly depending on ignition temperature.
WOS研究方向Energy & Fuels ; Engineering
语种英语
WOS记录号WOS:001144634300001
源URL[http://ir.gig.ac.cn/handle/344008/76158]  
专题有机地球化学国家重点实验室
通讯作者Chen, Yingjun
作者单位1.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Peoples R China
2.Shanghai Inst Pollut Control & Ecol Secur, Shanghai, Peoples R China
3.Fudan Univ, Dept Environm Sci & Engn, Shanghai Key Lab Atmospher Particle Pollut & Preve, Shanghai 200433, Peoples R China
4.Chinese Acad Sci, Guangzhou Inst Geochem, Guangdong Prov Key Lab Environm Protect & Resource, Guangzhou 510640, Peoples R China
推荐引用方式
GB/T 7714		 Cai, Junjie,Jiang, Hongxing,Chen, Yingjun,et al. Emission characteristics and optical properties of brown carbon during combustion of pine at different ignition temperatures under high-time resolution[J]. FUEL,2023,354:10.
APA Cai, Junjie,Jiang, Hongxing,Chen, Yingjun,Li, Jun,&Zhang, Gan.(2023).Emission characteristics and optical properties of brown carbon during combustion of pine at different ignition temperatures under high-time resolution.FUEL,354,10.
MLA Cai, Junjie,et al."Emission characteristics and optical properties of brown carbon during combustion of pine at different ignition temperatures under high-time resolution".FUEL 354(2023):10.

入库方式： OAI收割

来源：广州地球化学研究所

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