Abstract

Coal tar pitch (CTP) is an important heavy carbon resource. Its effective utilization largely depends on the full structural evaluation of CTP. In this paper, the CTP from Shanxi Datuhe coal tar distillation plant was adopted as the sample (DCTP). Multiple analytical equipments including X-ray diffractometer spectrometer, solid-state ¹³C nuclear magnetic resonance spectrometer, and X-ray photoelectron spectrometer were used to directly characterize DCTP, and DCTP was further catalytically oxidized over ruthenium ion. The typical characteristics of structures in DCTP were investigated by combining the two methods. It was demonstrated that aromatic structures dominated in DCTP, in which the aromaticity was up to 95 %. Specifically, aromatic structures were abundant in peri-condensed aromatic structures, poor in cata-condensed aromatic structures, but short of polyaryl structures. There were about 4 rings in each aromatic cluster, and the aromatic clusters were lowly substituted by a few methyl side chains. Furthermore, the nitrogen and sulfur atoms mainly existed in the heterocyclic ring, while the oxygen one was principally in C_ar‒O group.

中文翻译：

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煤焦油沥青结构的多种技术评价

摘要

煤焦油沥青（CTP）是重要的重碳资源。它的有效利用在很大程度上取决于对CTP的全面结构评估。本文以山西大土河煤焦油蒸馏厂的CTP为样品（DCTP）。使用X射线衍射仪，固态¹³ C核磁共振谱仪和X射线光电子能谱仪等多种分析设备直接表征DCTP，DCTP在钌离子上进一步被催化氧化。结合两种方法研究了DCTP结构的典型特征。结果表明，在DCTP中，芳香结构占主导地位，其中芳香度高达95％。具体而言，在周围的芳香结构丰富-稠合的芳族结构，催化-稠合的芳族结构差，但缺乏聚芳基结构。每个芳族簇中大约有4个环，并且芳族簇很少被一些甲基侧链取代。此外，氮和硫原子主要存在于杂环中，而氧原子主要存在于C _ar ‒O基团中。