Model of vapor-liquid equilibria for aqueous acid gas-alkanolamine systems using the electrolyte-NRTL equation

David M. Austgen; Gary T. Rochelle; Xiao Peng; Chau Chyun Chen

Model of vapor-liquid equilibria for aqueous acid gas-alkanolamine systems using the electrolyte-NRTL equation

David M. Austgen, Gary T. Rochelle, Xiao Peng, Chau Chyun Chen

Chemical Engineering

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96 Scopus citations

Abstract

A thermodynamically consistent model was developed for representing vapor-liquid equilibria in the acid gas (H₂S, CO₂)-alkanolamine-water system. The model accounts for chemical equilibria in a rigorous manner. Activity coefficients are represented, with the Electrolyte-NRTL equation treating both long-range ion-ion interactions and local interactions between all true liquid-phase species. Both water and alkanolamine are treated as solvents. Adjustable parameters of the Electrolyte-NRTL equation, representing short-range binary interactions, were fitted on binary and ternary system VLE data. Calculated H₂S and CO₂ equilibria are in good agreement with most of the reported experimental data for aqueous solutions of a single acid gas in monoethanolamine (MEA) and diethanolamine (DEA) in the temperature range 25-120°C.

Original language	English
Pages (from-to)	1060-1073
Number of pages	14
Journal	Industrial and Engineering Chemistry Research
Volume	v
Issue number	n
State	Published - 1992

Cite this

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title = "Model of vapor-liquid equilibria for aqueous acid gas-alkanolamine systems using the electrolyte-NRTL equation",

abstract = "A thermodynamically consistent model was developed for representing vapor-liquid equilibria in the acid gas (H2S, CO2)-alkanolamine-water system. The model accounts for chemical equilibria in a rigorous manner. Activity coefficients are represented, with the Electrolyte-NRTL equation treating both long-range ion-ion interactions and local interactions between all true liquid-phase species. Both water and alkanolamine are treated as solvents. Adjustable parameters of the Electrolyte-NRTL equation, representing short-range binary interactions, were fitted on binary and ternary system VLE data. Calculated H2S and CO2 equilibria are in good agreement with most of the reported experimental data for aqueous solutions of a single acid gas in monoethanolamine (MEA) and diethanolamine (DEA) in the temperature range 25-120°C.",

author = "Austgen, {David M.} and Rochelle, {Gary T.} and Xiao Peng and Chen, {Chau Chyun}",

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T1 - Model of vapor-liquid equilibria for aqueous acid gas-alkanolamine systems using the electrolyte-NRTL equation

AU - Austgen, David M.

AU - Rochelle, Gary T.

AU - Peng, Xiao

AU - Chen, Chau Chyun

PY - 1992

Y1 - 1992

N2 - A thermodynamically consistent model was developed for representing vapor-liquid equilibria in the acid gas (H2S, CO2)-alkanolamine-water system. The model accounts for chemical equilibria in a rigorous manner. Activity coefficients are represented, with the Electrolyte-NRTL equation treating both long-range ion-ion interactions and local interactions between all true liquid-phase species. Both water and alkanolamine are treated as solvents. Adjustable parameters of the Electrolyte-NRTL equation, representing short-range binary interactions, were fitted on binary and ternary system VLE data. Calculated H2S and CO2 equilibria are in good agreement with most of the reported experimental data for aqueous solutions of a single acid gas in monoethanolamine (MEA) and diethanolamine (DEA) in the temperature range 25-120°C.

AB - A thermodynamically consistent model was developed for representing vapor-liquid equilibria in the acid gas (H2S, CO2)-alkanolamine-water system. The model accounts for chemical equilibria in a rigorous manner. Activity coefficients are represented, with the Electrolyte-NRTL equation treating both long-range ion-ion interactions and local interactions between all true liquid-phase species. Both water and alkanolamine are treated as solvents. Adjustable parameters of the Electrolyte-NRTL equation, representing short-range binary interactions, were fitted on binary and ternary system VLE data. Calculated H2S and CO2 equilibria are in good agreement with most of the reported experimental data for aqueous solutions of a single acid gas in monoethanolamine (MEA) and diethanolamine (DEA) in the temperature range 25-120°C.

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M3 - Article

AN - SCOPUS:34250834520

SN - 0888-5885

VL - v

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EP - 1073

JO - Industrial and Engineering Chemistry Research

JF - Industrial and Engineering Chemistry Research

IS - n

ER -

Model of vapor-liquid equilibria for aqueous acid gas-alkanolamine systems using the electrolyte-NRTL equation

Abstract

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