Thermal Stability of Particle-Phase Monoethanolamine Salts

Abstract

The use of monoethanolamine (MEA, 2-hydroxyethanamine) for scrubbing of carbon dioxide from combustion flue gases may become the dominant technology for carbon capture in the near future. The widespread implementation of this technology will result in elevated emissions of MEA to the environment that may increase the loading and modify the properties of atmospheric aerosols. We have utilized experimental measurements together with aerosol microphysics calculations to derive thermodynamic properties of several MEA salts, potentially the dominant forms of MEA in atmospheric particles. The stability of the salts was found to depend strongly on the chemical nature of the acid counterpart. The saturation vapor pressures and vaporization enthalpies obtained in this study can be used to evaluate the role of MEA in the aerosol and haze formation, helping to assess impacts of the MEA-based carbon capture technology on air quality and climate change.

Atmospheric Chemistry of 2-Amino-2-methyl-1-propanol: A Theoretical and Experimental Study of the OH-Initiated Degradation under Simulated Atmospheric Conditions

“…The VTDMA studies support this by revealing a low vapor pressure of the AMP nitric acid salt, p 0 = (1.3 ± 0.3) ×10 –5 Pa at 298 K. There is only one other alkanolamine nitrate for which similar experimental data are available; the vapor pressure of the MEA nitric acid salt is reported to be around 5 times higher, p 0 = (9.0 ± 0.4) × 10 –5 Pa at 298 K, 77 which in part can be rationalized by the difference in basicity (p K b,MEA = 4.56; p K b,AMP = 4.32). 78 Inferring from the experimental vapor pressures of MEA nitrate 77 and other MEA salts including the sulfate, 79 it is obvious that AMP has a large potential to form new particles.…”

Environmental Indicator for COVID‐19 Non‐Pharmaceutical Interventions

“…All rights reserved. vehicles, with NO2, NOx, carbon dioxide (CO2), BC, and fine particle number (PNfine) identified as diesel exhaust sources (Tessum et al, 2018;Fan et al, 2018). In South Korea, source analysis studies have shown that there is a high correlation between estimated traffic volume and NO2 concentration (Kim et al, 2015).…”

“…Vehicle exhaust and evaporation emissions are the main emission sources of ozone and secondary particle precursors near the ground in cities and regions (Zhou et al., 2019; Yuan et al., 2013), and the spatial variation of nitrogen dioxide (NO 2 ), fine particulate matter (PM 2.5 ), and black carbon (BC) may also be significant affected by traffic flow density (Clougherty et al., 2013). A study in Los Angeles showed that nitrogen oxides (NO x ) were identified as a source of pollution for light vehicles, with NO 2 , NO x , carbon dioxide (CO 2 ), BC, and fine particle number (PN fine ) identified as diesel exhaust sources (Fan et al., 2018; Tessum et al., 2018). In South Korea, source analysis studies have shown that there is a high correlation between estimated traffic volume and NO 2 concentration (Kim et al., 2015).…”

Environmental indicator for effective control of COVID-19 spreading

“…Vehicle exhaust and evaporation emissions are the main emission sources of ozone and secondary particle precursors near the ground in cities and regions (Zhou et al, 2019; Yuan et al, 2013), and the spatial variation of nitrogen dioxide (NO 2 ), fine particulate matter (PM 2.5 ) and black carbon (BC) may also be significant affected by traffic flow density (Clougherty et al, 2013). A study in Los Angeles showed that nitrogen oxides (NO x ) were identified as a source of pollution for light vehicles, with NO 2 , NO x , carbon dioxide (CO 2 ), BC, and fine particle number (PN fine ) identified as diesel exhaust sources (Tessum et al, 2018; Fan et al, 2018). In South Korea, source analysis studies have shown that there is a high correlation between estimated traffic volume and NO 2 concentration (Kim et al, 2015).…”