Investigation of surface properties and thermodynamic properties of high-temperature coal tar pitch using inverse gas chromatography

IF 2.2 4区化学 Q3 CHEMISTRY, PHYSICAL

Colloid and Polymer Science Pub Date : 2025-01-10 DOI:10.1007/s00396-025-05376-w

Yuan Li, Nuerbiya Yalikun, Qiang Wang, Shenglong Yu

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Abstract

The surface properties and thermodynamic properties of high-temperature coal tar pitch (HCTP) were determined by inverse gas chromatography at 323.15–353.15 K, and its surface dispersion free energy, Lewis acid–base constant, Florry-Huggins interaction parameters and Hildebrand solubility parameters of HCTP were determined. In the range of 323.15–353.15 K, the surface dispersion free energy of HCTP increased with the increase of temperature. Furthermore, the acid constant K_a of HCTP calculated as 0.259, the base constant K_b is 3.1, demonstrated that HCTP is an amphoteric alkaline material. The Florry-Huggins interaction parameters showed that tetrahydrofuran and butanol were good solvents for HCTP. The Hildebrand solubility parameters of HCTP at 323.15–353.15 K were 17.33, 16.76, 15.98, and 14.68 (J/cm³)^0.5, respectively, and showed a downward trend with the increase of temperature.

Graphical abstract

Abstract Image

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反相气相色谱法研究高温煤焦油沥青的表面性质和热力学性质

采用反相气相色谱法测定了高温煤焦油沥青（HCTP）在323.15 ~ 353.15 K下的表面性质和热力学性质，并测定了其表面弥散自由能、Lewis酸碱常数、Florry-Huggins相互作用参数和Hildebrand溶解度参数。在323.15 ~ 353.15 K范围内，HCTP的表面色散自由能随温度的升高而增大。此外，HCTP的酸常数Ka为0.259，碱常数Kb为3.1，表明HCTP是两性碱性物质。Florry-Huggins相互作用参数表明，四氢呋喃和丁醇是HCTP的良好溶剂。HCTP在323.15 ~ 353.15 K下的Hildebrand溶解度参数分别为17.33、16.76、15.98和14.68 (J/cm3)0.5，且随温度升高呈下降趋势。图形抽象

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来源期刊

Colloid and Polymer Science 化学-高分子科学

CiteScore

4.60

自引率

4.20%

发文量

111

审稿时长

2.2 months

期刊介绍： Colloid and Polymer Science - a leading international journal of longstanding tradition - is devoted to colloid and polymer science and its interdisciplinary interactions. As such, it responds to a demand which has lost none of its actuality as revealed in the trends of contemporary materials science.