A comprehensive evaluation of enhanced temperature influence on gas and aerosol chemistry in the lamp-enclosed oxidation flow reactor (OFR) system
文献类型：期刊论文
| 作者 | Pan, Tianle11,12,13,14,15; Lambe, Andrew T.10; Hu, Weiwei11,12,14,15 ; He, Yicong1,9; Hu, Minghao8; Zhou, Huaishan11,12,13,14,15; Wang, Xinming11,12,14,15; Hu, Qingqing7; Chen, Hui7; Zhao, Yue6
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| 刊名 | ATMOSPHERIC MEASUREMENT TECHNIQUES
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| 出版日期 | 2024-08-27 |
| 卷号 | 17期号:16页码:4915-4939 |
| ISSN号 | 1867-1381 |
| DOI | 10.5194/amt-17-4915-2024 |
| 英文摘要 | Oxidation flow reactors (OFRs) have been extensively utilized to examine the formation of secondary organic aerosol (SOA). However, the UV lamps typically employed to initiate the photochemistry in OFRs can result in an elevated reactor temperature when their implications are not thoroughly evaluated. In this study, we conducted a comprehensive investigation into the temperature distribution within an Aerodyne potential aerosol mass OFR (PAM-OFR) and then examined the subsequent effects on flow and chemistry due to lamp heating. A lamp-induced temperature increase was observed, which was a function of lamp-driving voltage, number of lamps, lamp types, OFR residence time, and positions within the PAM-OFR. Under typical PAM-OFR operational conditions (e.g., < 5 d of equivalent atmospheric OH exposure under low-NOx conditions), the temperature increase typically ranged from 1-5 degrees C. Under extreme (but less frequently encountered) conditions, the heating could reach up to 15 degrees C. The influences of the increased temperature over ambient conditions on the flow distribution, gas, and condensed-phase chemistry within PAM-OFR were evaluated. Our findings indicate that the increase in temperature altered the flow field, resulting in a diminished tail on the residence time distribution and corresponding oxidant exposure due to faster recirculation. According to simulation results from a radical chemistry box model, the variation in absolute oxidant concentration within PAM-OFR due to temperature increase was minimal (< 5 %). The temperature influences on seed organic aerosol (OA) and newly formed secondary OA were also investigated, suggesting that an increase in temperature can impact the yield, size, and oxidation levels of representative biogenic and anthropogenic SOA types. Recommendations for temperature-dependent SOA yield corrections and PAM-OFR operating protocols that mitigate lamp-induced temperature enhancement and fluctuations are presented. We recommend blowing air around the reactor's exterior with fans during PAM-OFR experiments to minimize the temperature increase within PAM-OFR. Temperature increases are substantially lower for OFRs utilizing less powerful lamps compared to the Aerodyne version. |
| WOS研究方向 | Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:001299162300001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/80614]  |
| 专题 | 有机地球化学国家重点实验室 |
| 通讯作者 | Hu, Weiwei |
| 作者单位 | 1.Tsinghua Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Cont, Beijing 100084, Peoples R China 2.Univ Colorado, Dept Chem, Boulder, CO 80309 USA 3.Univ Colorado, Cooperat Inst Res Environm Sci CIRES, Boulder, CO 80309 USA 4.Univ Helsinki, Fac Sci, Inst Atmospher & Earth Syst Res INAR Phys, Helsinki 00014, Finland 5.CALTECH, Dept Environm Sci & Engn, Pasadena, CA 91125 USA 6.Shanghai Jiao Tong Univ, Sch Environm Sci & Engn, Shanghai 200240, Peoples R China 7.Shanghai Univ, Sch Environm & Chem Engn, Key Lab Organ Cpd Pollut Control Engn, Shanghai 200444, Peoples R China 8.Shanghai Jiao Tong Univ, China UK Low Carbon Coll, Shanghai 201306, Peoples R China 9.Colorado State Univ, Dept Mech Engn, Ft Collins, CO 80523 USA 10.Aerodyne Res Inc, Billerica, MA 01821 USA |
| 推荐引用方式 GB/T 7714 | Pan, Tianle,Lambe, Andrew T.,Hu, Weiwei,et al. A comprehensive evaluation of enhanced temperature influence on gas and aerosol chemistry in the lamp-enclosed oxidation flow reactor (OFR) system[J]. ATMOSPHERIC MEASUREMENT TECHNIQUES,2024,17(16):4915-4939. |
| APA | Pan, Tianle.,Lambe, Andrew T..,Hu, Weiwei.,He, Yicong.,Hu, Minghao.,...&Jathar, Shantanu H..(2024).A comprehensive evaluation of enhanced temperature influence on gas and aerosol chemistry in the lamp-enclosed oxidation flow reactor (OFR) system.ATMOSPHERIC MEASUREMENT TECHNIQUES,17(16),4915-4939. |
| MLA | Pan, Tianle,et al."A comprehensive evaluation of enhanced temperature influence on gas and aerosol chemistry in the lamp-enclosed oxidation flow reactor (OFR) system".ATMOSPHERIC MEASUREMENT TECHNIQUES 17.16(2024):4915-4939. |
入库方式： OAI收割
来源：广州地球化学研究所
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