Abstract
This work contributes to new and complementary experimental viscosity data for blended amine mixtures of aqueous N-methyldiethanolamine + 2-amino-2-methyl-1-propanol (MDEA + AMP) solutions with and without CO2 at different temperatures and mass fractions. For the unloaded MDEA + AMP solutions, measurements were conducted with total amine mass fractions ranging from 0.30 to 0.60. In the case of CO2-loaded aqueous MDEA + AMP solutions, experiments were performed at CO2 loadings ranging from 0.11 to 0.80. Proposed correlations were used to represent viscosity at the unloaded and CO2-loaded solutions within experimental uncertainty.
Highlights
The chemical absorption process, known as amine scrubbing using aqueous alkanolamines, is a well-known technology and is applied in removing CO2 and/or H2S from gas
Reported viscosity data of AMP and MDEA + AMP solutions are tabulated in Table 1.20−34 from the past works, it is found that the viscosity values of CO2-loaded MDEA + AMP solutions are scarce and viscosity values of aqueous MDEA + AMP solutions are only available at limited compositions and temperatures
At all temperatures and concentrations studied, the viscosity of unloaded and CO2-loaded aqueous MDEA + AMP solutions decreased with an increase in temperature
Summary
The chemical absorption process, known as amine scrubbing using aqueous alkanolamines, is a well-known technology and is applied in removing CO2 and/or H2S from gas. The tertiary amine MDEA is considered to be an important amine for removal of CO2 from gas streams because of its properties such as less energy requirement for amine regenerating due to low heat of reaction with CO2, good resistance to chemical and thermal degradation, and high capture capacity (1 mol of CO2/1 mol of amine).[1,12−14] Sterically hindered amine such as 2-amino-2-methyl-1-. Considering the advantages of MDEA and AMP in obtaining lower absorption enthalpy, faster absorption kinetics, lower solvent regeneration requirement, and higher loading capacity, this work reports the viscosity data of blended aqueous solutions of MDEA and AMP, which can be considered as an attractive solvent for the removal of CO2 coupled with satisfactory stripping characteristics. The present paper reports new viscosity data for aqueous MDEA + AMP in unloaded and CO2-loaded systems together with the available literature data
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