Study of OH-initiated degradation of 2-aminoethanol

Karl, Matthias; Dye, Christian; Schmidbauer, Norbert; Wisthaler, Armin; Mikoviny, Tomáš; D’Anna, Barbara; Müller, Markus; Borrás, Esther; Clemente, E.; Muñoz, Amalia; Porras, R.; Ródenas, Milagros; Vázquez, Mónica; Brauers, T.

doi:10.5194/acp-12-1881-2012

Cited by 56 publications

(101 citation statements)

References 78 publications

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“…The main aim of the present study is to investigate the atmospheric product spectrum from MEA-oxidation, including nitrosamines and nitramines but also carbonylic compounds, under different environmental conditions using the detailed MEA photooxidation scheme proposed in the work by Karl et al (2012). The WRF--EMEP model framework included a simplified treatment of the OH-initiated oxidation of MEA intended for prediction of nitrosamines and nitramines, with limited detail on carbonylic products forming upon H-abstraction at the -CH 2 and -CH 2 OH groups of MEA.…”

Section: Modelling the Dispersion And Photo-oxidation Of Meamentioning

confidence: 99%

“…Dry and wet deposition of MEA and related oxidation products is described in section S1 of the Supplementary materials. MEA-detail b (Karl et al, 2012) a PBL height defined with 850 mb pressure level at top.…”

Section: Simulations and Model Configurationsmentioning

confidence: 99%

“…The degradation of MEA (HOCH 2 CH 2 NH 2 ) by OH has been studied extensively in the large outdoor environmental chamber European Photochemical Reactor EUPHORE (Nielsen et al, 2010;Karl et al, 2012). Major products were formamide and formaldehyde, minor products were the carbonyls 2-oxoacetamide and aminoacetaldehyde.…”

Section: Schemes For the Oh-initiated Oxidation Of Meamentioning

confidence: 99%

“…Initial CH 2 :NH 2 :CH 2 HO branching ratios through H-abstraction by OH radicals were reported to be 0.8:0.1:0.1 (Nielsen et al, 2010) and 0.8:0.15:0.05 (Karl et al, 2012). The higher contribution of abstraction at the -NH 2 group by Karl et al (2012) takes into account that the MEA-nitramine signal by PTR-TOF-MS had not been corrected for possible generation of ionic fragments upon protonation.…”

Section: Schemes For the Oh-initiated Oxidation Of Meamentioning

confidence: 99%

“…coastal regions) and at night time . The rate coefficient for the reaction between OH and MEA, k 1,OH , has been established by three independent studies using different rate determination methods and chambers; and is in the range of 7--9 × 10 − 11 cm 3 molecule − 1 s − 1 (Borduas et al, 2013;Onel et al, 2012;Karl et al, 2012). Using the room temperature rate coefficient of 7.6 × 10 − 11 cm 3 molecule − 1 s − 1 by Onel et al (2012) and an average 12 h daytime OH concentration of 2 × 10 6 molecule cm − 3 (Atkinson and Arey, 2003) the lifetime of MEA in the OH-reaction is less than 2 hoursh.…”

Section: Schemes For the Oh-initiated Oxidation Of Meamentioning

confidence: 99%

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Modelling atmospheric oxidation of 2-aminoethanol (MEA) emitted from post-combustion capture using WRF–Chem

Karl

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Walker

et al. 2015

Science of The Total Environment

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Limiting global warming to less than 2 °C relative to pre-industrial levels would require substantial cuts in anthropogenic emissions of greenhouse gases (IPCC, 2014). Carbon capture and storage (CCS) is an important mitigation technology for reducing anthropogenic carbon dioxide (CO 2 ) emissions from industrial and energy-related point sources. In this process, CO 2 is captured, conditioned, compressed and transported to a storage location for long-term isolation from the atmosphere. Several problems can occur during CCS with impacts on the environment. Post-combustion capture from power plants entails emissions of pollutants, solvents and its degradation by-products to the atmosphere, emissions to water and generation of solid waste (e.g. Reynolds et al., 2012). During the further steps of the CCS chain, CO 2 release during transport in pipelines as well as the escape of injected CO 2 from the storage location to the atmosphere or groundwater pose risks to the environment (Koorneef et al., 2012).Modelling atmospheric oxidation of 2-aminoethanol (MEA) emitted from post-combustion capture using WRF--Chem AbstractCarbon capture and storage (CCS) is a technological solution that can reduce the amount of carbon dioxide (CO 2 ) emissions from the use of fossil fuel in power plants and other industries. A leading method today is amine based post-combustion capture, in which 2-aminoethanol (MEA) is one of the most studied absorption solvents. In this process, amines are released to the atmosphere through evaporation and entrainment from the CO 2 absorber column. Modelling is a key instrument for simulating the atmospheric dispersion and chemical transformation of MEA, and for projections of ground-level air concentrations and deposition rates. In this study, the Weather Research and Forecasting model inline coupled with chemistry, WRF--Chem, was applied to quantify the impact of using a comprehensive MEA photo-oxidation sequence compared to using a simplified MEA scheme. Main discrepancies were found for iminoethanol (roughly doubled in the detailed scheme) and 2-nitro aminoethanol, short MEA-nitramine (reduced by factor of two in the detailed scheme). The study indicates that MEA emissions from a full-scale capture plant can modify regional background levels of isocyanic acid. Predicted atmospheric concentrations of isocyanic acid were however below the limit value of 1 ppbv for ambient exposure. The dependence of the formation of hazardous compounds in the OH-initiated oxidation of MEA on ambient levels level of nitrogen oxides (NO x ) was studied in a scenario without NO x emissions from a refinery area in the vicinity of the capture plant. Hourly MEAnitramine peak concentrations higher than 40 pg m − 3 did only occur when NO x mixing ratios were above 2 ppbv. Therefore, the spatial variability and temporal variability of levels of OH and NO x need to be taken into account in the health risk assessment. The health risk due to direct emissions of nitrosamines and nitramines from full-scale CO 2 capture should be i...

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Section: Modelling the Dispersion And Photo-oxidation Of Meamentioning

confidence: 99%

Section: Simulations and Model Configurationsmentioning

confidence: 99%

Section: Schemes For the Oh-initiated Oxidation Of Meamentioning

confidence: 99%

Section: Schemes For the Oh-initiated Oxidation Of Meamentioning

confidence: 99%

Section: Schemes For the Oh-initiated Oxidation Of Meamentioning

confidence: 99%

See 3 more Smart Citations

Modelling atmospheric oxidation of 2-aminoethanol (MEA) emitted from post-combustion capture using WRF–Chem

Karl

Svendby

Walker

et al. 2015

Science of The Total Environment

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New insights into atmospheric sources and sinks of isocyanic acid, HNCO, from recent urban and regional observations

et al. 2014

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Isocyanic acid (HNCO) has only recently been measured in the ambient atmosphere, and many aspects of its atmospheric chemistry are still uncertain. HNCO was measured during three diverse field campaigns: California Nexus-Research at the Nexus of Air Quality and Climate Change (CalNex 2010) at the Pasadena ground site, Nitrogen, Aerosol Composition, and Halogens on a Tall Tower (NACHTT 2011) at the Boulder Atmospheric Observatory (BAO) in Weld County, CO, and Biofuel Crops emission of Ozone precursors intensive (BioCORN 2011), in a cornfield NW of Fort Collins, CO. Mixing ratios varied from below detection limit (~0.003 ppbv) to over 1.2 ppbv during a period when agricultural burning impacted the BAO Tower site. Urban areas, such as the CalNex 2010 Pasadena site, appear to have both primary (combustion) and secondary (photochemical) sources of HNCO, 50 ± 9%, and 33 ± 12%, respectively, while primary sources were responsible for the large mixing ratios of HNCO observed during the wintertime NACHTT study in suburban Colorado. Isocyanic acid during the BioCORN study in rural NE Colorado was closely correlated to ozone and therefore likely photochemically produced as a secondary product from amines or formamide. The removal of HNCO from the lower atmosphere is thought to be due to deposition, as common gas phase loss processes of photolysis and reactions with hydroxyl radicals, are slow. These ambient measurements are consistent with some HNCO deposition, which was evident at night at these surface sites.

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LC–MS/MS Method for Simultaneous Determination of Monoethanol- and Dimethylnitramine in Aqueous Soil Extracts

et al. 2017

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Study of OH-initiated degradation of 2-aminoethanol

Cited by 56 publications

References 78 publications

Modelling atmospheric oxidation of 2-aminoethanol (MEA) emitted from post-combustion capture using WRF–Chem

Modelling atmospheric oxidation of 2-aminoethanol (MEA) emitted from post-combustion capture using WRF–Chem

New insights into atmospheric sources and sinks of isocyanic acid, HNCO, from recent urban and regional observations

LC–MS/MS Method for Simultaneous Determination of Monoethanol- and Dimethylnitramine in Aqueous Soil Extracts

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