IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Glass Ball as Bullet Solubility System: Carbon dioxide with Cellulose 2,4-acetate (CA)
Components:
   (1) Carbon dioxide; CO2; [124-38-9]  NIST Chemistry WebBook for detail
   (2) Cellulose 2,4-acetate (CA); ; [9004-35-7]  NIST Chemistry WebBook for detail
Original Measurements:
   S.A. Stern and A.H. De Meringo, J. Polym. Sci., Polym. Phys. Ed. 16, 735 (1978).

 Variables:
   Temperature = 273.0 K - 343.0 K
   Pressure = 273.0 K - 343.0 K

 Prepared By:
   A.K. Bokarev

 Experimental Data:   (Subscripts 1,2,3, ..., in column headings refer to components 1,2,3, ...)
   
Dual mode sorption parameters for carbon dioxide in cellulose 2,4-acetate
T/KHenry's law constant, K [cm3(STP)/cm3 atm]Langmuir's parameter, CH [cm3(STP) g-1]Affinity Coefficient b [atm-1]
273.02.5032.770.511
283.02.1325.930.441
303.00.91131.310.134
318.00.58026.810.107
 View Figure 1 for this Evaluation

Method/Apparatus/Procedure:
   A volumetric method was used in measurement of the solubility. The gas pressure decay with time was followed by means of a gauge. Corrections for the equation of state of CO2 were made according to Ref. 1.

 Source and Purity of Materials:
   CO2: purity 99.9 %. CA: Eastman Kodak, Trademark Edukit; content of acetyl groups 39.8 %, density 1.36 g/cm3.

 Estimated Errors:
   Solubility: Standard error of estimate of CO2 concentration: from 5.5% at 273 K to 14% at 343 K.

 References:
   1N E. Van Huff, G. Houghton, and 3. Coull, 2. Chem. Eng. Data 8, 336 (1963).