A similarity variable for estimating the heat capacity of solid organic compounds

Impregnation of Carbonate Rock with Bituminous Compounds. III. Thermophysical Properties of the Impregnation Material

“…The presence of solids in the composition of oil and its products is confirmed by the behavior of specific heat (melting/glass and dissolution peaks) (Figure 1 and Figures 4-6). Analysis of different methods for calculation of oil heat capacity (the method of group components, thermodynamic similarity and empirical equations) showed that the smallest deviations of specific heat were obtained by the methods of Shaw [65]- [67] and Filippov [73]. Calculation method [52] gives much lower results (Figure 1), since it is not intended for heavy oils and bitumen.…”

“…Calculation method [52] gives much lower results (Figure 1), since it is not intended for heavy oils and bitumen. Thus, the calculation method [65]- [67] allows us to estimate the values of heat capacity with the smallest error on the basis of minimal information. Analysis of phase behavior of the oil products, based on calculation of excess heat capacity representing the difference between the measured heat capacity and heat capacity of the solid phase [38] [65]- [67] has showed (Figure 7) the presence of areas with both endothermic and exothermic effects.…”

“…The results of calculations according to [52] [65]- [67] [73] and their comparison are presented in Figure 1. This figure shows that the smallest deviations of specific heat are calculated by methods of Shaw [65]- [67] and Filippov [73]. For the calculations by the method of Shaw [65]- [67] the elemental composition data ( Table 1) have been used, while for the calculations by the method of Filippov [73]-the data on the content of saturated and aromatic hydrocarbons [43] [44] and molecu-lar weight ( Table 2).…”

“…Comparison of the experimental and calculated heat capacity values of the oil (Sample No.1): 1-experiment; 2-calculation according to[73]; 3-calculation according to[65]-[67]; 4-calculation according to[52].…”

A similarity variable for estimating the heat capacity of solid organic compounds

“…This similarity variable approach was recently and successfully applied [2] in the development of a predictive correlation applicable to solids as diverse as polymers, charge transfer complexes, ill-defined hydrocarbon resources such as bitumen and heavy oils and asphaltenes, where the role of the correlation as a baseline for solid behavior has been found to be particularly useful.…”