Piperazine/N-methylpiperazine/N,N’-dimethylpiperazine as an Aqueous Solvent for Carbon Dioxide Capture

A blend of piperazine (PZ), N-methylpiperazine (MPZ) and N,N’-dimethylpiperazine (DMPZ) is described as a novel CO2 capture solvent for aqueous absorption-stripping. This blend provides improved solid solubility and heat of absorption compared to concentrated PZ. No insolubility was observed fo...

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Main Authors: Freeman Stephanie A., Chen Xi, Nguyen Thu, Rafique Humera, Xu Qing, Rochelle Gary T.
Format: Article
Language:English
Published: EDP Sciences 2014-09-01
Series:Oil & Gas Science and Technology
Online Access:http://dx.doi.org/10.2516/ogst/2012089
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spelling doaj-6b0262b18f95469eb088b68234b326a12021-04-02T06:58:19ZengEDP SciencesOil & Gas Science and Technology1294-44751953-81892014-09-0169590391410.2516/ogst/2012089ogst120016Piperazine/N-methylpiperazine/N,N’-dimethylpiperazine as an Aqueous Solvent for Carbon Dioxide CaptureFreeman Stephanie A.Chen XiNguyen ThuRafique HumeraXu QingRochelle Gary T. A blend of piperazine (PZ), N-methylpiperazine (MPZ) and N,N’-dimethylpiperazine (DMPZ) is described as a novel CO2 capture solvent for aqueous absorption-stripping. This blend provides improved solid solubility and heat of absorption compared to concentrated PZ. No insolubility was observed for regions of high CO2 loading, unlike PZ solvents. The blend performed like concentrated PZ in terms of CO2 capacity and CO2 absorption rate, both of which were more than double that of a traditional 7 molal (30 wt%) MonoEthanolAmine (MEA). Thermal equilibrium was established between the three constituent amines that increases the thermal stability compared to traditional blended solvents. The primary drawback of this novel solvent system is enhanced amine volatility at absorber conditions compared with both concentrated PZ and MEA. http://dx.doi.org/10.2516/ogst/2012089
collection DOAJ
language English
format Article
sources DOAJ
author Freeman Stephanie A.
Chen Xi
Nguyen Thu
Rafique Humera
Xu Qing
Rochelle Gary T.
spellingShingle Freeman Stephanie A.
Chen Xi
Nguyen Thu
Rafique Humera
Xu Qing
Rochelle Gary T.
Piperazine/N-methylpiperazine/N,N’-dimethylpiperazine as an Aqueous Solvent for Carbon Dioxide Capture
Oil & Gas Science and Technology
author_facet Freeman Stephanie A.
Chen Xi
Nguyen Thu
Rafique Humera
Xu Qing
Rochelle Gary T.
author_sort Freeman Stephanie A.
title Piperazine/N-methylpiperazine/N,N’-dimethylpiperazine as an Aqueous Solvent for Carbon Dioxide Capture
title_short Piperazine/N-methylpiperazine/N,N’-dimethylpiperazine as an Aqueous Solvent for Carbon Dioxide Capture
title_full Piperazine/N-methylpiperazine/N,N’-dimethylpiperazine as an Aqueous Solvent for Carbon Dioxide Capture
title_fullStr Piperazine/N-methylpiperazine/N,N’-dimethylpiperazine as an Aqueous Solvent for Carbon Dioxide Capture
title_full_unstemmed Piperazine/N-methylpiperazine/N,N’-dimethylpiperazine as an Aqueous Solvent for Carbon Dioxide Capture
title_sort piperazine/n-methylpiperazine/n,n’-dimethylpiperazine as an aqueous solvent for carbon dioxide capture
publisher EDP Sciences
series Oil & Gas Science and Technology
issn 1294-4475
1953-8189
publishDate 2014-09-01
description A blend of piperazine (PZ), N-methylpiperazine (MPZ) and N,N’-dimethylpiperazine (DMPZ) is described as a novel CO2 capture solvent for aqueous absorption-stripping. This blend provides improved solid solubility and heat of absorption compared to concentrated PZ. No insolubility was observed for regions of high CO2 loading, unlike PZ solvents. The blend performed like concentrated PZ in terms of CO2 capacity and CO2 absorption rate, both of which were more than double that of a traditional 7 molal (30 wt%) MonoEthanolAmine (MEA). Thermal equilibrium was established between the three constituent amines that increases the thermal stability compared to traditional blended solvents. The primary drawback of this novel solvent system is enhanced amine volatility at absorber conditions compared with both concentrated PZ and MEA.
url http://dx.doi.org/10.2516/ogst/2012089
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