TY - JOUR
T1 - Foaming Dependence on the Interface Affinities of Surfactant-like Molecules
AU - Tiwari, Surya Prakash
AU - Steckel, Janice A.
AU - Sarma, Moushumi
AU - Bryant, Jonathan
AU - Lippert, Cameron A.
AU - Widger, Leland R.
AU - Thompson, Jesse
AU - Liu, Kunlei
AU - Siefert, Nicholas
AU - Hopkinson, David
AU - Shi, Wei
N1 - Publisher Copyright:
Copyright © 2019 American Chemical Society.
PY - 2019/10/30
Y1 - 2019/10/30
N2 - We have explored the relationship between physical properties and foaming behavior of 30 wt % aqueous monoethanolamine (MEA) solutions with three different surfactant-like additives. The additives included one commercial surfactant, cetyltrimethylammonium bromide (CTAB), and two CO2 capture catalysts that behave as weak surfactants. The physical properties of interest were the additives' affinity for the liquid-vapor interface and the viscosity, surface tension, and surface elasticity of the solutions. The physical properties were explored using molecular dynamics simulations as well as experiments. The additives' affinity for the liquid-vapor interface played a key role in the foaming behavior by affecting the interfacial properties (surface tension and surface elasticity) of the aqueous MEA solutions. The solution containing CTAB showed the largest surface tension depression and the largest surface elasticity and resulted in the largest amount of foaming. The two catalyst solutions had almost similar surface tensions but differed in their elasticity. The catalyst solution with higher surface elasticity showed more foaming due to higher foam stability.
AB - We have explored the relationship between physical properties and foaming behavior of 30 wt % aqueous monoethanolamine (MEA) solutions with three different surfactant-like additives. The additives included one commercial surfactant, cetyltrimethylammonium bromide (CTAB), and two CO2 capture catalysts that behave as weak surfactants. The physical properties of interest were the additives' affinity for the liquid-vapor interface and the viscosity, surface tension, and surface elasticity of the solutions. The physical properties were explored using molecular dynamics simulations as well as experiments. The additives' affinity for the liquid-vapor interface played a key role in the foaming behavior by affecting the interfacial properties (surface tension and surface elasticity) of the aqueous MEA solutions. The solution containing CTAB showed the largest surface tension depression and the largest surface elasticity and resulted in the largest amount of foaming. The two catalyst solutions had almost similar surface tensions but differed in their elasticity. The catalyst solution with higher surface elasticity showed more foaming due to higher foam stability.
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U2 - 10.1021/acs.iecr.9b03105
DO - 10.1021/acs.iecr.9b03105
M3 - Article
AN - SCOPUS:85073264470
SN - 0888-5885
VL - 58
SP - 19877
EP - 19889
JO - Industrial and Engineering Chemistry Research
JF - Industrial and Engineering Chemistry Research
IS - 43
ER -