矿产保护与利用2025，Vol.45Issue(5)：39-49,11.DOI:10.13779/j.cnki.issn1001-0076.2025.05.003
煤炭地下气化工程焦油组分特性研究
Study on Tar Composition Characteristics of Underground Coal Gasification Project
摘要
Abstract
To investigate the issue of coal tar condensation and blockage during long-distance pipeline transportation in Underground Coal Gasification(UCG),this study was conducted within the context of a UCG project in Shandong,China.Condensed tar samples collected from a vertical borehole section(T1)and the purification area(T2)of the gas pipeline were analyzed using elemental analysis,Fourier Transform Infrared Spectroscopy(FTIR),and Gas Chromatography-Mass Spectrometry(GC-MS)to characterize their compositional features.The results indicate that T1 tar has a high carbon content of 90.80%,with hydrogen and oxygen contents of only 4.16%and 3.66%,respectively.Its composition is predominantly aromatic hydrocarbons(90.29%),among which polycyclic aromatic hydrocarbons(PAHs)constitute 84.94%.The molecular structure is characterized by highly substituted aromatic rings and oxygen-containing non-phenolic aromatic compounds.After pipeline transportation,the composition of T2 tar changes significantly.The carbon content decreases to 77.99%,representing a 14.11%reduction relative to T1.In contrast,the hydrogen and oxygen contents increase to 7.35%and 13.57%,marking relative increases of 76.68%and 270.76%,respectively.While the proportion of aromatic hydrocarbons rises slightly to 92.97%(a 3.08%relative increase),the proportion of PAHs within the aromatic fraction decreases to 79.79%(a 6.06%relative decrease).Furthermore,non-fused polycyclic aromatic hydrocarbons emerge as new components.The molecular structure shifts towards being dominated by mono-substituted aromatic rings with enriched oxygen-containing functional groups.This research provides a theoretical basis for understanding the formation and migration mechanisms of tar in UCG processes.It also offers scientific support for developing tar control technologies for pipelines and equipment in UCG engineering.关键词
煤炭地下气化/煤焦油/管道输送/稠环芳烃Key words
underground coal gasification/coal tar/pipeline transport/thickened aromatic hydrocarbons分类
矿山工程引用本文复制引用
辛林,程卫民,牛茂斐,杨冰玉,王若男,杨敏,刁垌彤,李欣颖,谭一,张凯榕,宋永坤..煤炭地下气化工程焦油组分特性研究[J].矿产保护与利用,2025,45(5):39-49,11.基金项目
国家自然科学基金项目(52374211,52304190,52304060) （52374211,52304190,52304060）
山东省泰山学者青年专家项目(TSQN202507183) （TSQN202507183）
山东省自然科学基金项目(ZR2023QE117,ZR2024QE029) （ZR2023QE117,ZR2024QE029）
