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Preprints
https://doi.org/10.5194/acp-2020-1103
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-2020-1103
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  02 Nov 2020

02 Nov 2020

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This preprint is currently under review for the journal ACP.

Evidence of ketene emissions from petrochemical industries and implications for ozone production potential

Chinmoy Sarkar1,a, Gracie Wong1, Anne Mielnik1, Alex B. Guenther1, Taehyung Lee2, Taehyun Park2, Jihee Ban2, Seokwon Kang2, Jin-Soo Park3, Joonyoung Ahn3, Danbi Kim3, Hyunjae Kim3, Jinsoo Choi3, Beom-Keon Seo4, Jong-Ho Kim4, Jeong-Ho Kim5, Soo Bog Park4, and Saewung Kim1 Chinmoy Sarkar et al.
  • 1Department of Earth System Science, University of California Irvine, 92697, California, USA
  • 2Department of Environmental Science, Hankuk University of Foreign Studies, Yongin 17035, South Korea
  • 3National Institute of Environmental Research, Inchoen 22689, South Korea
  • 4Institute of Environmental Research, Hanseo University, Seosan-si, South Korea
  • 5APM Engineering Co. Ltd., Seoul, South Korea
  • anow at: Air Quality Research Center, University of California Davis, One Shields Avenue, Davis, CA 95616, USA

Abstract. Ketene, a rarely measured reactive VOC, was quantified in the emission plumes from Daesan petrochemical facility in South Korea using airborne PTR-TOF-MS measurements. Ketene mixing ratios as high as ~ 40–50 ppb were observed in the emission plumes. Emission rates of ketene from the facility were estimated using a horizontal advective flux approach and ranged from 84–316 kg h−1. These emission rates were compared to the emission rates of major VOCs such as benzene, toluene, and acetaldehyde. Significant correlations (r2 > 0.7) of ketene with methanol, acetaldehyde, benzene, and toluene were observed for the peak emissions, indicating commonality of emission sources. The calculated average ketene OH reactivity for the emission plumes over Daesan ranged from 3.33–7.75 s−1, indicating the importance of the quantification of ketene to address missing OH reactivity in the polluted environment. The calculated average O3 production potential for ketene ranged from 2.98–6.91 ppb h−1. Our study suggests that ketene has the potential to significantly influence local photochemistry and therefore, further studies focusing on the photooxidation and atmospheric fate of ketene through chamber studies is required to improve our current understanding of VOC OH reactivity and hence, tropospheric O3 production.

Chinmoy Sarkar et al.

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Short summary
We present experimental proofs illustrating emission of ketene in an industrial facility in South Korea. It has been rarely reported the emission of such a compound but our experimental data shows that the emission rate is substantial. It potentially has tremendous implication in regional air quality and public health as it is highly reactive and toxic at the sometime.
We present experimental proofs illustrating emission of ketene in an industrial facility in...
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