Abstract
In the polymer industry, separation equipment is required to separate unreacted monomers and solvents from polymers. In order to design such equipments, solubilities of gases and vapors in molten polymers are needed as fundamental data. It is very helpful if the weight-fraction Henry’s constant, which gives solubilities of a solute at concentrated regions or a polymer, can be estimated by a predictive method. In the present study, a new expression for the free volume term has been derived and is coupled with the UNIFAC model. The present UNIFAC-FV model was applied to common polymer systems. The weight-fraction Henry’s constants were calculated for several volatile hydrocarbons and the calculated results were compared with the experimental data determined by a gas chromatographic technique. The present UNIFAC-FV model with a new free volume expression was found to be helpful in predicting the weight-fraction Henry’s constants of hydrocarbon solutes in molten polystyrene, in polypropylene, and in low-density polyethylene. It is advantageous that our model is applicable both supercritical gases and subcritical vapors with no adjustable parameters.
| Original language | English |
|---|---|
| Pages (from-to) | 225-240 |
| Number of pages | 16 |
| Journal | Chemical Engineering Communications |
| Volume | 34 |
| Issue number | 1-6 |
| DOIs | |
| Publication status | Published - Mar 1985 |
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All Science Journal Classification (ASJC) codes
- Chemistry(all)
- Chemical Engineering(all)
Cite this
Gas Chromatographic Determination and Correlation of Weight-Fraction Henry’S Constants for Hydrocarbon Gases and Vapors in Molten Polymers. / Iwai, Yoshio; Ohzono, Mitsuru; Arai, Yasuhiko.
In: Chemical Engineering Communications, Vol. 34, No. 1-6, 03.1985, p. 225-240.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Gas Chromatographic Determination and Correlation of Weight-Fraction Henry’S Constants for Hydrocarbon Gases and Vapors in Molten Polymers
AU - Iwai, Yoshio
AU - Ohzono, Mitsuru
AU - Arai, Yasuhiko
PY - 1985/3
Y1 - 1985/3
N2 - In the polymer industry, separation equipment is required to separate unreacted monomers and solvents from polymers. In order to design such equipments, solubilities of gases and vapors in molten polymers are needed as fundamental data. It is very helpful if the weight-fraction Henry’s constant, which gives solubilities of a solute at concentrated regions or a polymer, can be estimated by a predictive method. In the present study, a new expression for the free volume term has been derived and is coupled with the UNIFAC model. The present UNIFAC-FV model was applied to common polymer systems. The weight-fraction Henry’s constants were calculated for several volatile hydrocarbons and the calculated results were compared with the experimental data determined by a gas chromatographic technique. The present UNIFAC-FV model with a new free volume expression was found to be helpful in predicting the weight-fraction Henry’s constants of hydrocarbon solutes in molten polystyrene, in polypropylene, and in low-density polyethylene. It is advantageous that our model is applicable both supercritical gases and subcritical vapors with no adjustable parameters.
AB - In the polymer industry, separation equipment is required to separate unreacted monomers and solvents from polymers. In order to design such equipments, solubilities of gases and vapors in molten polymers are needed as fundamental data. It is very helpful if the weight-fraction Henry’s constant, which gives solubilities of a solute at concentrated regions or a polymer, can be estimated by a predictive method. In the present study, a new expression for the free volume term has been derived and is coupled with the UNIFAC model. The present UNIFAC-FV model was applied to common polymer systems. The weight-fraction Henry’s constants were calculated for several volatile hydrocarbons and the calculated results were compared with the experimental data determined by a gas chromatographic technique. The present UNIFAC-FV model with a new free volume expression was found to be helpful in predicting the weight-fraction Henry’s constants of hydrocarbon solutes in molten polystyrene, in polypropylene, and in low-density polyethylene. It is advantageous that our model is applicable both supercritical gases and subcritical vapors with no adjustable parameters.
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U2 - 10.1080/00986448508911200
DO - 10.1080/00986448508911200
M3 - Article
AN - SCOPUS:0010348867
VL - 34
SP - 225
EP - 240
JO - Chemical Engineering Communications
JF - Chemical Engineering Communications
SN - 0098-6445
IS - 1-6
ER -