« Previous AbstractAnthropogenic drivers of 2013-2017 trends in summer surface ozone in China    Next Abstract"Cervidins A-D: Novel Glycine Conjugated Fatty Acids from the Tarsal Gland of Male Whitetail Deer, Odocoileus virginianus" »

Environ Sci Technol

Title:		Evaluation of a New Chemical Mechanism for 2-Amino-2-methyl-1-propanol in a Reactive Environment from CSIRO Smog Chamber Experiments
Author(s):		Li K; White S; Zhao B; Geng C; Halliburton B; Wang Z; Zhao Y; Yu H; Yang W; Bai Z; Azzi M;
Address:		"State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China. CSIRO Energy, P.O. Box 52, North Ryde, New South Wales 1670, Australia. State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China. New South Wales Department of Planning, Industry and Environment, P.O. Box 29, Lidcombe, New South Wales 1825, Australia. Pacific Northwest National Laboratory, Richland, Washington 99352, United States. Research Center for Air Pollution and Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China. CSIRO Energy, 10 Murray Dwyer Circuit, Mayfield West, New South Wales 2304, Australia"
Journal Title:		Environ Sci Technol
Year:		2020
Volume:		20200804
Issue:		16
Page Number:		9844 - 9853
DOI:		10.1021/acs.est.9b07669
ISSN/ISBN:		1520-5851 (Electronic) 0013-936X (Linking)
Abstract:		"Amines are considered as an emerging class of atmospheric pollutants that are of great importance to atmospheric chemistry and new particle formation. As a typical amine, 2-amino-2-methyl-1-propanol (AMP) is one of the proposed solvents for capturing CO(2) from flue gas streams in amine-based post-combustion CO(2) capture plants, and it is expected to result in AMP emission and secondary product formation in the atmosphere. However, the current knowledge of its atmospheric chemistry and kinetics is poorly understood, particularly in a reactive environment. In this work, we used the CSIRO smog chamber to study the photo-oxidation of AMP in the presence of volatile organic compound (VOC)-NOx surrogate mixtures over a range of initial amine concentrations. O(3) formation was significantly inhibited when AMP was added to the surrogate VOC-NOx mixtures, implying that AMP could alter known atmospheric chemical reaction pathways and the prevailing reactivity. Simultaneously, a large amount of AMP-derived secondary aerosol was formed, with a considerably high aerosol mass yield (i.e., ratio of aerosol formed to reacted AMP) of 1.06 +/- 0.20. Based on updated knowledge of its kinetics, oxidation pathways, and product yields, we have developed a new mechanism (designated as CSIAMP-19), integrated it into the Carbon Bond 6 (CB6) chemical mechanism, and evaluated it against available smog chamber data. Compared with the existing AMP mechanism (designated as CarterAMP-08), the modified CB6 with CSIAMP-19 mechanism improves prediction against AMP-VOC-NOx experiments across a range of initial AMP concentrations, within +/-10% model error for gross ozone production. Our results contribute to scientific understanding of AMP photochemistry and to the development of the chemical mechanism of other amines. Once some potential limitations are considered, the updated AMP reaction scheme can be further embedded into the chemical transport model for regional modeling scenarios where AMP-related emissions are of concern"
Keywords:		Aerosols/analysis *Air Pollutants/analysis *Propanolamines Smog/analysis;
Notes:		"MedlineLi, Kangwei White, Stephen Zhao, Bin Geng, Chunmei Halliburton, Brendan Wang, Zhibin Zhao, Yanyun Yu, Hai Yang, Wen Bai, Zhipeng Azzi, Merched eng Research Support, Non-U.S. Gov't 2020/07/22 Environ Sci Technol. 2020 Aug 18; 54(16):9844-9853. doi: 10.1021/acs.est.9b07669. Epub 2020 Aug 4"