Температурні залежності термодинамічних властивостей кобальтфосфатного каталізатора

Abstract

Values of basic thermodynamic parameters for the cobalt phosphate Co3(PO4)2 catalyst are determined. Mathematical expression of Maier-Kelley equation for the description of temperature dependence of heat capacity of this phosphate is offered. By integration of the offered expression, using classical thermody-namic functions, temperature dependences of an enthalpy, entropy, Gibbs energy and internal energy of Co3(PO4)2 for a wide temperature interval 298–1428 K are received. It is established that the studied phos-phate is characterized by considerable thermodynamic stability and it can be used in chemical and phys-ico-chemical processes at high temperatures. The received values can be also applied at the subsequent thermodynamic calculations and when modeling physico-chemical interaction in complex multicomponent systems with participation of Co3(PO4)2.