A THERMODYNAMIC MODEL OF THE HEAT CAPACITY OF COMPOSITIONALLY COMPLEX MULTICOMPONENT POLYMER SOLUTIONS: KRAFT BLACK LIQUOR

Abstract

A thermodynamic model of the heat capacity of multicomponent polymer solutions is developed and applied to the prediction of the heat capacity of kraft black liquor. The model is developed using a pseudo-binary solution assumption. The form of the excess heat capacity is expressed as Cp^E = γWⁿW₁Wm₂ where γ, m, and n are model parameters. For the particular system studied γ varies linearly with temperature and indicates the magnitude and degree of temperature dependence of the excess heat capacity. Parameters m and n are independent of temperature. The resulting model is capable of predicting the heat capacity of compositionally complex black liquor to within 1-3% of the experimental data. @KEYWORDS: Heat capacity, Thermodynamics, Kraft black liquor, Polymer solutions

KEYWORDS:

• Heat capacity
• Thermodynamics
• Kraft black liquor
• Polymer solutions

Additional information

Notes on contributors

E. KIRAN

Author to whom correspondence should be addressed

A.L. FRICKE

Present address: Department of Chemical Engineering, University of Florida, Gainesville, FL 32611