Model of vapor-liquid equilibria in the aqueous acid gas - alkanolamine system using the electrolyte - NRTL equation

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

Model of vapor-liquid equilibria in the aqueous acid gas - alkanolamine system using the electrolyte - NRTL equation

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

Chemical Engineering

Research output: Contribution to conference › Paper › peer-review

2 Scopus citations

Abstract

A thermodynamically-consistent model is developed for representing vapor-liquid equilibia in the aci 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, are 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. Without fitting additional parameters representation of experimental equilibria for mixtures of H₂S and CO₂ in aqueous solutions of MEA and DEA is good.

Original language	English
Pages	69B 44p
State	Published - 1988
Event	Preprint - American Institute of Chemical Engineers - New Orleans, LA, USA Duration: Mar 6 1988 → Mar 10 1988

Conference

Conference	Preprint - American Institute of Chemical Engineers
City	New Orleans, LA, USA
Period	03/6/88 → 03/10/88

Cite this

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

abstract = "A thermodynamically-consistent model is developed for representing vapor-liquid equilibia in the aci 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, are 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. Without fitting additional parameters representation of experimental equilibria for mixtures of H2S and CO2 in aqueous solutions of MEA and DEA is good.",

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

year = "1988",

language = "English",

pages = "69B 44p",

note = "Preprint - American Institute of Chemical Engineers ; Conference date: 06-03-1988 Through 10-03-1988",

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TY - CONF

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

AU - Austgen, David M.

AU - Rochelle, Gary T.

AU - Peng, Xiao

AU - Chen, Chau Chyun

PY - 1988

Y1 - 1988

N2 - A thermodynamically-consistent model is developed for representing vapor-liquid equilibia in the aci 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, are 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. Without fitting additional parameters representation of experimental equilibria for mixtures of H2S and CO2 in aqueous solutions of MEA and DEA is good.

AB - A thermodynamically-consistent model is developed for representing vapor-liquid equilibia in the aci 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, are 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. Without fitting additional parameters representation of experimental equilibria for mixtures of H2S and CO2 in aqueous solutions of MEA and DEA is good.

UR - http://www.scopus.com/inward/record.url?scp=0024134813&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:0024134813

SP - 69B 44p

T2 - Preprint - American Institute of Chemical Engineers

Y2 - 6 March 1988 through 10 March 1988

ER -

Model of vapor-liquid equilibria in the aqueous acid gas - alkanolamine system using the electrolyte - NRTL equation

Abstract

Conference

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