(174cf) Reaction Kinetics of Carbon Dioxide with Aqueous Solution of DEEP Eutectic Solvent & Methyl Diethanolamine Amine Using the Stopped Flow Technique

Authors: 
Ababneh, H., Hamad Bin Khalifah University
El-Naas, M., Qatar University
Nasser, M., Qatar University
Benamor, A., Qatar University
v\:* {behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);} w\:* {behavior:url(#default#VML);} .shape {behavior:url(#default#VML);}

iMADE02 Normal Hani Ababneh 4 56 2019-04-09T06:27:00Z 2019-04-09T06:56:00Z 2019-04-09T07:01:00Z 1 331 1892 iMADE 15 4 2219 16.00 800x600

Clean Clean false false false false EN-US X-NONE AR-SA MicrosoftInternetExplorer4


/* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman",serif;}


REACTION KINETICS OF CARBON
DIOXIDE WITH AQUEOUS SOLUTION OF DEEP EUTECTIC SOLVENT & METHYL
DIETHANOLAMINE AMINE USING THE STOPPED FLOW TECHNIQUE

H.
Ababneh, A. Benamor, Mustafa Nasser and M. H. El-Naas

Gas
processing Centre, College of Engineering Qatar University, P.O 2713, Doha,
Qatar

hababneh@qu.edu.qa, Benamor.abdelbaki@qu.edu.qa

Global warming has become a worldwide issue
lately. Greenhouse gas emissions, which are responsible of the observed
temperature increase, have reached alarming levels leading the governments and
agencies around the world to force stringent and strict regulations on the
greenhouse gases emissions. Among the most established technologies to capture
CO2 is amine-based scrubbing. However, amine scrubbing, in addition
of being an energy-intensive process has other operational issues. The
usage of Deep Eutectic
Solvents (DES) as rate promoters in the CO2 amine absorption process
have not taken much consideration from the research community as the CO2
reaction with mixtures of DES and MDEA has not been studied yet.  In this work, for the first time, the
kinetics data of CO2 reaction with DES and MDEA using stopped-flow
method is presented. The DES consisted of equimolar amounts of lactic acid,
β-alanine, and water. The temperature changed from 298 to 313 K for a MDEA
solution concentration varying from 0.1 to 1 molar, while DES concentration
ranged from 0.1 to 1% of the total mass of the solution. The overall
rate constants (Figure 1) increased with increasing temperature and with
increasing DES concentration within the solution. The obtained results from
this work showed that DES could be good rate promoters for the actual
amine-based CO2 capture technology and another step in the ongoing
efforts for the development of efficient new solvents for the removal of CO2
from flue and industrial gases.

Keywords: CO2
Capture, Methyldiethanolamine, Deep Eutectic Solvent, Kinetics, Stopped Flow



Figure 1: Overall rate constant for CO2-DES-MDEA
reaction at different concentations