Kinetics of Carbon Dioxide absorption into aqueous MDEA+[bmim][BF4] solutions from 303 to 333K

Afshin Ahmady; Mohd Ali Hashim; Mohamed Kheireddine Aroua

doi:10.1016/j.cej.2012.06.037

Kinetics of Carbon Dioxide absorption into aqueous MDEA+[bmim][BF₄] solutions from 303 to 333K

Afshin Ahmady
, Mohd Ali Hashim
, Mohamed Kheireddine Aroua^*

^*Corresponding author for this work

Department of Chemical Engineering

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

67 Scopus citations

Abstract

The kinetics of CO₂ absorption in aqueous solutions of MDEA+[bmim][BF₄] were investigated using a stirred cell reactor where the relevant parameters were evaluated. The rate equation of the absorption reaction was found to be close to first order with respect to CO₂ at temperatures ranging from 303 to 333K and [bmim][BF₄] concentration from 0 to 2.0molL^-1. The activation energy decreased from 43.32kJmol^-1 to 8.65kJmol^-1 with increasing [bmim][BF₄] concentration from 0 to 2.0molL^-1 in aqueous 4molL^-1 MDEA solution. Calculated results of the enhancement factor and Hatta number showed that the performance of CO₂ absorption in the aqueous 4molL^-1 MDEA+[bmim][BF₄] solution almost obeyed the pseudo first order regime.

Original language	English
Pages (from-to)	317-328
Number of pages	12
Journal	Chemical Engineering Journal
Volume	200-202
DOIs	https://doi.org/10.1016/j.cej.2012.06.037
State	Published - 15 Aug 2012

Keywords

CO absorption
Ionic liquids
Kinetics
Mass transfer
MDEA
Reaction engineering

ASJC Scopus subject areas

General Chemistry
Environmental Chemistry
General Chemical Engineering
Industrial and Manufacturing Engineering

Access to Document

10.1016/j.cej.2012.06.037

Cite this

@article{18f58469b0f14ce4a9d390c6468fe006,

title = "Kinetics of Carbon Dioxide absorption into aqueous MDEA+[bmim][BF4] solutions from 303 to 333K",

abstract = "The kinetics of CO2 absorption in aqueous solutions of MDEA+[bmim][BF4] were investigated using a stirred cell reactor where the relevant parameters were evaluated. The rate equation of the absorption reaction was found to be close to first order with respect to CO2 at temperatures ranging from 303 to 333K and [bmim][BF4] concentration from 0 to 2.0molL-1. The activation energy decreased from 43.32kJmol-1 to 8.65kJmol-1 with increasing [bmim][BF4] concentration from 0 to 2.0molL-1 in aqueous 4molL-1 MDEA solution. Calculated results of the enhancement factor and Hatta number showed that the performance of CO2 absorption in the aqueous 4molL-1 MDEA+[bmim][BF4] solution almost obeyed the pseudo first order regime.",

keywords = "CO absorption, Ionic liquids, Kinetics, Mass transfer, MDEA, Reaction engineering",

author = "Afshin Ahmady and Hashim, \{Mohd Ali\} and Aroua, \{Mohamed Kheireddine\}",

year = "2012",

month = aug,

day = "15",

doi = "10.1016/j.cej.2012.06.037",

language = "English",

volume = "200-202",

pages = "317--328",

journal = "Chemical Engineering Journal",

issn = "1385-8947",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Kinetics of Carbon Dioxide absorption into aqueous MDEA+[bmim][BF4] solutions from 303 to 333K

AU - Ahmady, Afshin

AU - Hashim, Mohd Ali

AU - Aroua, Mohamed Kheireddine

PY - 2012/8/15

Y1 - 2012/8/15

N2 - The kinetics of CO2 absorption in aqueous solutions of MDEA+[bmim][BF4] were investigated using a stirred cell reactor where the relevant parameters were evaluated. The rate equation of the absorption reaction was found to be close to first order with respect to CO2 at temperatures ranging from 303 to 333K and [bmim][BF4] concentration from 0 to 2.0molL-1. The activation energy decreased from 43.32kJmol-1 to 8.65kJmol-1 with increasing [bmim][BF4] concentration from 0 to 2.0molL-1 in aqueous 4molL-1 MDEA solution. Calculated results of the enhancement factor and Hatta number showed that the performance of CO2 absorption in the aqueous 4molL-1 MDEA+[bmim][BF4] solution almost obeyed the pseudo first order regime.

AB - The kinetics of CO2 absorption in aqueous solutions of MDEA+[bmim][BF4] were investigated using a stirred cell reactor where the relevant parameters were evaluated. The rate equation of the absorption reaction was found to be close to first order with respect to CO2 at temperatures ranging from 303 to 333K and [bmim][BF4] concentration from 0 to 2.0molL-1. The activation energy decreased from 43.32kJmol-1 to 8.65kJmol-1 with increasing [bmim][BF4] concentration from 0 to 2.0molL-1 in aqueous 4molL-1 MDEA solution. Calculated results of the enhancement factor and Hatta number showed that the performance of CO2 absorption in the aqueous 4molL-1 MDEA+[bmim][BF4] solution almost obeyed the pseudo first order regime.

KW - CO absorption

KW - Ionic liquids

KW - Kinetics

KW - Mass transfer

KW - MDEA

KW - Reaction engineering

UR - https://www.scopus.com/pages/publications/84865570948

U2 - 10.1016/j.cej.2012.06.037

DO - 10.1016/j.cej.2012.06.037

M3 - Article

AN - SCOPUS:84865570948

SN - 1385-8947

VL - 200-202

SP - 317

EP - 328

JO - Chemical Engineering Journal

JF - Chemical Engineering Journal

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