Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Experimental study on equilibrium solubility (at low partial pressures), density, viscosity and corrosion rate of carbon dioxide in aqueous solutions of ascorbic acid

Mazinani, S., Samsami, A., Jahanmiri, A., Sardarian, A. R.
Fluid Phase Equilib. 2011, 305, 1, 39-42
ABSTRACT
In this paper, ascorbic acid as a new carbon dioxide (CO2) absorbent was investigated. The equilibrium solubility of CO2 into 0.5, 1 and 1.5 moldm-3 (M) aqueous ascorbic acid solutions were measured experimentally with a stirred batch reactor at total atmospheric pressure over the CO2 partial pressure ranging from 0 to 45 kPa and temperatures between 298 and 313 K. The results of the gas solubility are presented as loading capacity (mol CO2/mol ascorbic acid) as function of partial pressure of CO2 for all experimental runs. Experimental results showed that solubility of CO2 increases with increase in molar concentration of ascorbic acid solution at a given temperature and decreases with increase in temperature at a given concentration. The densities and viscosities of the ascorbic acid solutions were measured at the same conditions of the solubility measurement. Some corrosion rate tests were also performed on carbon steel at temperature of 308 K. It was observed that viscosity and corrosion rate increase when the molar concentration of ascorbic acid solution increases.
Compounds
# Formula Name
1 C6H8O6 L-ascorbic acid
2 H2O water
3 CO2 carbon dioxide
Datasets
The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type Compound-# Property Variable Constraint Phase Method #Points
  • POMD
  • 1
  • 2
  • Viscosity, Pa*s ; Liquid
  • Temperature, K; Liquid
  • Amount concentration (molarity), mol/dm3 - 1; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Capillary tube (Ostwald; Ubbelohde) method
  • 9
  • POMD
  • 1
  • 2
  • Mass density, kg/m3 ; Liquid
  • Temperature, K; Liquid
  • Amount concentration (molarity), mol/dm3 - 1; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Pycnometric method
  • 9
  • POMD
  • 1
  • 3
  • 2
  • Mole fraction - 3 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Solvent: Amount concentration (molarity), mol/dm3 - 1; Liquid
  • Liquid
  • Gas
  • Declining pressure during CO2 absorption
  • 45