溶剂萃取对长焰煤官能团结构的影响

IF 3 3区 农林科学 Q2 ECOLOGY Fire-Switzerland Pub Date : 2023-08-10 DOI:10.3390/fire6080307
Jun Guo, Yanping Quan, H. Wen, Xuezhao Zheng, Guobin Cai, Yani Jin
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引用次数: 0

摘要

煤分子的官能团结构是影响自燃的重要因素之一。然而,很难确定这种结构的确切影响。提取技术能够改变煤中的官能团,作为抑制自燃反应的一种手段。本工作采用多种溶剂从中国陕北曹家滩煤矿提取煤。这些溶剂的萃取效率依次为磺基琥珀酸二辛酯(AOT)>水>正己烷>环己烷+AOT+乙醇>环己烷>乙醇>甲醇。除AOT外,与仅用水提取的对照样品相比,提取的煤中的官能团浓度降低。乙醇、正己烷和甲醇分别在捕获具有芳香结构、脂肪族结构和含氧基团的煤分子方面提供了最佳的提取效率。这项工作的结果有望有助于未来关于提取具有特定官能团的煤分子的研究。这项工作还提出了积极预防和控制煤炭开采、储存和运输过程中自燃的新方法。
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The Effects of Solvent Extraction on the Functional Group Structure of Long-Flame Coal
The functional group structures of coal molecules are one of the most important factors affecting spontaneous combustion. However, it is difficult to determine the exact effects of such structures. Extraction technology is able to modify the functional groups in coal as a means of inhibiting spontaneous combustion reactions. The present work extracted coal from the Caojiatan mine in northern Shaanxi, China, with various solvents. The extraction effectiveness of these solvents was found to decrease in the order of dioctyl sulfosuccinate (AOT) > water > n-hexane > cyclohexane + AOT + ethanol > cyclohexane > ethanol > methanol. With the exception of the AOT, the concentration of functional groups in the extracted coal was decreased compared with that in a control specimen extracted using only water. Ethanol, n-hexane, and methanol provided the optimal extraction efficiencies in terms of capturing coal molecules with aromatic structures, aliphatic structures, and oxygen-containing groups, respectively. The results of this work are expected to assist in future research concerning the extraction of coal molecules with specific functional groups. This work also suggests new approaches to the active prevention and control of spontaneous combustion during the mining, storage, and transportation of coal.
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来源期刊
Fire-Switzerland
Fire-Switzerland Multiple-
CiteScore
3.10
自引率
15.60%
发文量
182
审稿时长
11 weeks
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