Measurement and Thermodynamic Modeling for CO2 Solubility in the N-(2-Hydroxyethyl) Piperazine + Water System

Amine scrubbing is the most important technique for capturing CO2. The cyclic diamine N-(2-Hydroxyethyl)-piperazine (HEPZ), a derivative of piperazine, with good mutual solubility in aqueous solution, a low melting point, and a high boiling point, has the potential to replace PZ as an activator adde...

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Autores principales:	Simeng Li, Gern Woo Kang, Jian Chen
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	CO2 absorption CO2 solubility vapor–liquid equilibrium N-(2-Hydroxyethyl)-piperazine (HEPZ) thermodynamic modeling ENRTL model General Works A
Acceso en línea:	https://doaj.org/article/d88d76c831604d3b98638fa750554de7
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spelling	oai:doaj.org-article:d88d76c831604d3b98638fa750554de72021-12-01T13:33:52ZMeasurement and Thermodynamic Modeling for CO2 Solubility in the N-(2-Hydroxyethyl) Piperazine + Water System2296-598X10.3389/fenrg.2021.785039https://doaj.org/article/d88d76c831604d3b98638fa750554de72021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fenrg.2021.785039/fullhttps://doaj.org/toc/2296-598XAmine scrubbing is the most important technique for capturing CO2. The cyclic diamine N-(2-Hydroxyethyl)-piperazine (HEPZ), a derivative of piperazine, with good mutual solubility in aqueous solution, a low melting point, and a high boiling point, has the potential to replace PZ as an activator added in the mixed amine system to capture CO2. In this study, the solubility of CO2 in aqueous HEPZ solutions was determined for three HEPZ concentrations and four temperatures. The VLE data for HEPZ-H2O were obtained using a gas–liquid double circulation kettle at pressure 30–100 kPa, and the thermodynamic model for the HEPZ-H2O-CO2 system was built in Aspen Plus based on the electrolytic non-random two-liquid (ENRTL) activity model. The physical parameters for HEPZ and the interaction parameters for ENRTL, along with reaction constants of carbamate reactions, were regressed. Using the thermodynamic model, the CO2 cyclic capacity, speciation with loading, and heat of reaction for the CO2 capture system by the aqueous HEPZ solution are predicted and analyzed.Simeng LiGern Woo KangJian ChenFrontiers Media S.A.articleCO2 absorptionCO2 solubilityvapor–liquid equilibriumN-(2-Hydroxyethyl)-piperazine (HEPZ)thermodynamic modelingENRTL modelGeneral WorksAENFrontiers in Energy Research, Vol 9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	CO2 absorption CO2 solubility vapor–liquid equilibrium N-(2-Hydroxyethyl)-piperazine (HEPZ) thermodynamic modeling ENRTL model General Works A
spellingShingle	CO2 absorption CO2 solubility vapor–liquid equilibrium N-(2-Hydroxyethyl)-piperazine (HEPZ) thermodynamic modeling ENRTL model General Works A Simeng Li Gern Woo Kang Jian Chen Measurement and Thermodynamic Modeling for CO2 Solubility in the N-(2-Hydroxyethyl) Piperazine + Water System
description	Amine scrubbing is the most important technique for capturing CO2. The cyclic diamine N-(2-Hydroxyethyl)-piperazine (HEPZ), a derivative of piperazine, with good mutual solubility in aqueous solution, a low melting point, and a high boiling point, has the potential to replace PZ as an activator added in the mixed amine system to capture CO2. In this study, the solubility of CO2 in aqueous HEPZ solutions was determined for three HEPZ concentrations and four temperatures. The VLE data for HEPZ-H2O were obtained using a gas–liquid double circulation kettle at pressure 30–100 kPa, and the thermodynamic model for the HEPZ-H2O-CO2 system was built in Aspen Plus based on the electrolytic non-random two-liquid (ENRTL) activity model. The physical parameters for HEPZ and the interaction parameters for ENRTL, along with reaction constants of carbamate reactions, were regressed. Using the thermodynamic model, the CO2 cyclic capacity, speciation with loading, and heat of reaction for the CO2 capture system by the aqueous HEPZ solution are predicted and analyzed.
format	article
author	Simeng Li Gern Woo Kang Jian Chen
author_facet	Simeng Li Gern Woo Kang Jian Chen
author_sort	Simeng Li
title	Measurement and Thermodynamic Modeling for CO2 Solubility in the N-(2-Hydroxyethyl) Piperazine + Water System
title_short	Measurement and Thermodynamic Modeling for CO2 Solubility in the N-(2-Hydroxyethyl) Piperazine + Water System
title_full	Measurement and Thermodynamic Modeling for CO2 Solubility in the N-(2-Hydroxyethyl) Piperazine + Water System
title_fullStr	Measurement and Thermodynamic Modeling for CO2 Solubility in the N-(2-Hydroxyethyl) Piperazine + Water System
title_full_unstemmed	Measurement and Thermodynamic Modeling for CO2 Solubility in the N-(2-Hydroxyethyl) Piperazine + Water System
title_sort	measurement and thermodynamic modeling for co2 solubility in the n-(2-hydroxyethyl) piperazine + water system
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/d88d76c831604d3b98638fa750554de7
work_keys_str_mv	AT simengli measurementandthermodynamicmodelingforco2solubilityinthen2hydroxyethylpiperazinewatersystem AT gernwookang measurementandthermodynamicmodelingforco2solubilityinthen2hydroxyethylpiperazinewatersystem AT jianchen measurementandthermodynamicmodelingforco2solubilityinthen2hydroxyethylpiperazinewatersystem
_version_	1718405144153948160

Measurement and Thermodynamic Modeling for CO2 Solubility in the N-(2-Hydroxyethyl) Piperazine + Water System

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