Correlation of physical and chemical properties of coal hydrogenation distillates

• Published in: Energy & fuels Vol. 2; no. 2; pp. 230 - 233
• Main Author: Mazumdar, Bhupendra K
• Format: Journal Article
• Language: English
• Published: United States American Chemical Society 01.03.1988
• Subjects: 01 COAL, LIGNITE, AND PEAT; 010405 - Coal, Lignite, & Peat- Hydrogenation & Liquefaction; 010600 - Coal, Lignite, & Peat- Properties & Composition; CARBONACEOUS MATERIALS; CHEMICAL PROPERTIES; CHEMICAL REACTIONS; COAL; COAL LIQUIDS; CORRELATIONS; DATA; DISTILLATES; ENERGY SOURCES; EQUATIONS; FLUIDS; FOSSIL FUELS; FUELS; HYDROGENATION; INFORMATION; LIQUIDS; MATERIALS; NUMERICAL DATA; PHYSICAL PROPERTIES; PREDICTION EQUATIONS; THEORETICAL DATA
• ISSN: 0887-0624; 1520-5029
• DOI: 10.1021/ef00008a022

An appraisal of the correlations recently advanced by White et al. to characterize coal hydrogenation distillates has led to the development of a corresponding set of much simpler and more accurate equations for the prediction of number-average molecular weight (M{sub n}), refractive index ({ovr n}), and aromaticity (f{sub a}) based on easy-to-measure properties such as the mid-boiling point (T{sub b}), the atomic hydrogen to carbon ratio (H/C), and density (d). The relationships are either simple or multiple linear equations; those of White et al. are all exponential equations. Further, no prior knowledge of molecular weight (M{sub n}) is required for the operation of any of the new correlations developed. Three different correlations have been derived for the computation of aromaticity of the coal liquids based on (1) H/C and M{sub c}/d (molar volume of a hypothetical unit of a liquid per carbon atom), (2) H/C and {ovr n}, and (3) H/C and d. The three equations give values mostly within {plus minus}0.01 of the experimental values obtainable by MNR. Correlation 2 gives the highest accuracy, the average absolute deviation being 1.77%.