(558am) Influence of 1-(2-aminoethyl)Piperazine As a Promoter on the Equilibrium CO2 Solubility in Aqueous N-Methyldiethanolamine & 2-Amino-2-Methyl-1-Propanol Solvent System
AIChE Annual Meeting
2019
2019 AIChE Annual Meeting
Poster Sessions
General Poster Session II
Wednesday, November 13, 2019 - 3:30pm to 5:00pm
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Pallavi Shah Normal user 2 208 2010-03-26T17:36:00Z 2019-04-12T18:51:00Z 2019-04-12T18:51:00Z 1 325 1854 ncl 15 4 2175 15.00 800x600
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line-height:115%">Separation of CO2 from flue gas
stream using chemical absorption is the most effective technology used across
the world to overcome the global climate change issue. In this regard absorption
by blended alkanolamine solvents is the most promising methodology used for the
capture of CO2 from industrial flue gas stream. In the area of
chemical absorption, there has been a growing interest in the development of
efficient amine blends that can substitute the conventional alkanolamines such
as MEA, DEA, MDEA and AMP. Although the absorption capacities of aqueous AMP,
MDEA are higher than those of MEA, but these absorbents have relatively lower
CO2 absorption reaction rates. Recently Piperazine (PZ) has been
used as a better solvent and rate activator as a rate activator for CO2
capture from flue gas with a 10% energy benefit compared to conventional
amines. However the usage of concentrated piperazine is limited due to its low
solubility in water at lower temperature and lean CO2 loading. So
taking into consideration the performance of PZ, its derivative AEP which is a
cyclic amine can be investigated for acid gas treatment operation. The
estimation of reliable equilibrium solubility data of CO2 with amine
solvents is essential for the optimization and design of CO2 capture
process. The present study reports the equilibrium CO2 solubility in
some potential aqueous AEP activated blended amine solvent .The measurements
are conducted with total amine composition of 30 wt% at temperature 303.2,
313.2 and 323.2 K within the Pressure range of (2-250 kPa) .The various amine
system considered in this work for the solubility measurement are (AEP + H2O),
(AEP + MDEA + H2O) and (AEP + AMP + H2O). The
experimental measurement were conducted in a stirred equilibrium Cell and the
CO2 solubility in different blends are analyzed in the form of PCO2
vs αCO2 plot. The solubility data are further correlated
with Modified Kent –Eisenberg Model. The equilibrium constant related to AEP
deprotonation and carbamate formation reactions are regressed as a function of
CO2 partial pressure, temperature and amine composition to fit the
experimental solubility data. text-indent:36.0pt;line-height:115%"> text-indent:36.0pt">
stream using chemical absorption is the most effective technology used across
the world to overcome the global climate change issue. In this regard absorption
by blended alkanolamine solvents is the most promising methodology used for the
capture of CO2 from industrial flue gas stream. In the area of
chemical absorption, there has been a growing interest in the development of
efficient amine blends that can substitute the conventional alkanolamines such
as MEA, DEA, MDEA and AMP. Although the absorption capacities of aqueous AMP,
MDEA are higher than those of MEA, but these absorbents have relatively lower
CO2 absorption reaction rates. Recently Piperazine (PZ) has been
used as a better solvent and rate activator as a rate activator for CO2
capture from flue gas with a 10% energy benefit compared to conventional
amines. However the usage of concentrated piperazine is limited due to its low
solubility in water at lower temperature and lean CO2 loading. So
taking into consideration the performance of PZ, its derivative AEP which is a
cyclic amine can be investigated for acid gas treatment operation. The
estimation of reliable equilibrium solubility data of CO2 with amine
solvents is essential for the optimization and design of CO2 capture
process. The present study reports the equilibrium CO2 solubility in
some potential aqueous AEP activated blended amine solvent .The measurements
are conducted with total amine composition of 30 wt% at temperature 303.2,
313.2 and 323.2 K within the Pressure range of (2-250 kPa) .The various amine
system considered in this work for the solubility measurement are (AEP + H2O),
(AEP + MDEA + H2O) and (AEP + AMP + H2O). The
experimental measurement were conducted in a stirred equilibrium Cell and the
CO2 solubility in different blends are analyzed in the form of PCO2
vs αCO2 plot. The solubility data are further correlated
with Modified Kent –Eisenberg Model. The equilibrium constant related to AEP
deprotonation and carbamate formation reactions are regressed as a function of
CO2 partial pressure, temperature and amine composition to fit the
experimental solubility data. text-indent:36.0pt;line-height:115%"> text-indent:36.0pt">
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