Determination of vapor-liquid equilibrium (VLE) plots of 1-dimethylamino-2-propanol solutions using the pH method

Helei Liu; Xiao Luo; Zhiwu Liang; Paitoon Tontiwachwuthikul

doi:10.1021/ie5050023

Determination of vapor-liquid equilibrium (VLE) plots of 1-dimethylamino-2-propanol solutions using the pH method

Helei Liu
, Xiao Luo
, Zhiwu Liang^*
, Paitoon Tontiwachwuthikul

^*Corresponding author for this work

Hunan University
University of Regina

Research output: Contribution to journal › Article › peer-review

28 Citations (Scopus)

Abstract

In this work, the pH values of 1-dimethylamino-2-propanol (1DMA2P) solution were measured over a CO₂ loading range of 0-0.8 mol CO₂/mol amine, 1DMA2P concentration range of 1.5-4.0 mol/L, and a temperature range of 298-303 K. Two-dimensional (2D) vapor-liquid equilibrium (VLE) plots of the 1DMA2P-H₂O-CO₂ system were established by calculating ion concentrations in the 1DMA2P solution using the pH method. A three-dimensional (3D) VLE surface representing the concentrations of ions in the 1DMA2P solution was also obtained. In addition, equations were generated and used to predict CO₂ loading in 1DMA2P solution, based on knowledge of amine concentration, temperature, and pH of the solution. The results showed that these equations performed very well in predicting the CO₂ loading of a 1DMA2P solution, with an absolute average deviation (AAD) of 9.2%.

Original language	English
Pages (from-to)	4709-4716
Number of pages	8
Journal	Industrial and Engineering Chemistry Research
Volume	54
Issue number	17
DOIs	https://doi.org/10.1021/ie5050023
Publication status	Published - 6 May 2015
Externally published	Yes

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10.1021/ie5050023

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@article{d6c1dbed7eba42668bbc92097370a55a,

title = "Determination of vapor-liquid equilibrium (VLE) plots of 1-dimethylamino-2-propanol solutions using the pH method",

abstract = "In this work, the pH values of 1-dimethylamino-2-propanol (1DMA2P) solution were measured over a CO2 loading range of 0-0.8 mol CO2/mol amine, 1DMA2P concentration range of 1.5-4.0 mol/L, and a temperature range of 298-303 K. Two-dimensional (2D) vapor-liquid equilibrium (VLE) plots of the 1DMA2P-H2O-CO2 system were established by calculating ion concentrations in the 1DMA2P solution using the pH method. A three-dimensional (3D) VLE surface representing the concentrations of ions in the 1DMA2P solution was also obtained. In addition, equations were generated and used to predict CO2 loading in 1DMA2P solution, based on knowledge of amine concentration, temperature, and pH of the solution. The results showed that these equations performed very well in predicting the CO2 loading of a 1DMA2P solution, with an absolute average deviation (AAD) of 9.2\%.",

author = "Helei Liu and Xiao Luo and Zhiwu Liang and Paitoon Tontiwachwuthikul",

note = "Publisher Copyright: {\textcopyright} 2015 American Chemical Society.",

year = "2015",

month = may,

day = "6",

doi = "10.1021/ie5050023",

language = "English",

volume = "54",

pages = "4709--4716",

journal = "Industrial and Engineering Chemistry Research",

issn = "0888-5885",

publisher = "American Chemical Society",

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}

TY - JOUR

T1 - Determination of vapor-liquid equilibrium (VLE) plots of 1-dimethylamino-2-propanol solutions using the pH method

AU - Liu, Helei

AU - Luo, Xiao

AU - Liang, Zhiwu

AU - Tontiwachwuthikul, Paitoon

PY - 2015/5/6

Y1 - 2015/5/6

N2 - In this work, the pH values of 1-dimethylamino-2-propanol (1DMA2P) solution were measured over a CO2 loading range of 0-0.8 mol CO2/mol amine, 1DMA2P concentration range of 1.5-4.0 mol/L, and a temperature range of 298-303 K. Two-dimensional (2D) vapor-liquid equilibrium (VLE) plots of the 1DMA2P-H2O-CO2 system were established by calculating ion concentrations in the 1DMA2P solution using the pH method. A three-dimensional (3D) VLE surface representing the concentrations of ions in the 1DMA2P solution was also obtained. In addition, equations were generated and used to predict CO2 loading in 1DMA2P solution, based on knowledge of amine concentration, temperature, and pH of the solution. The results showed that these equations performed very well in predicting the CO2 loading of a 1DMA2P solution, with an absolute average deviation (AAD) of 9.2%.

AB - In this work, the pH values of 1-dimethylamino-2-propanol (1DMA2P) solution were measured over a CO2 loading range of 0-0.8 mol CO2/mol amine, 1DMA2P concentration range of 1.5-4.0 mol/L, and a temperature range of 298-303 K. Two-dimensional (2D) vapor-liquid equilibrium (VLE) plots of the 1DMA2P-H2O-CO2 system were established by calculating ion concentrations in the 1DMA2P solution using the pH method. A three-dimensional (3D) VLE surface representing the concentrations of ions in the 1DMA2P solution was also obtained. In addition, equations were generated and used to predict CO2 loading in 1DMA2P solution, based on knowledge of amine concentration, temperature, and pH of the solution. The results showed that these equations performed very well in predicting the CO2 loading of a 1DMA2P solution, with an absolute average deviation (AAD) of 9.2%.

UR - https://www.scopus.com/pages/publications/84929222942

U2 - 10.1021/ie5050023

DO - 10.1021/ie5050023

M3 - Article

AN - SCOPUS:84929222942

SN - 0888-5885

VL - 54

SP - 4709

EP - 4716

JO - Industrial and Engineering Chemistry Research

JF - Industrial and Engineering Chemistry Research

IS - 17

ER -

Determination of vapor-liquid equilibrium (VLE) plots of 1-dimethylamino-2-propanol solutions using the pH method

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