首页|五彩湾次烟煤醇解可溶物的组成特征与不溶物的快速热解产物分布

五彩湾次烟煤醇解可溶物的组成特征与不溶物的快速热解产物分布

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以异丙醇为溶剂在300℃对五彩湾次烟煤(WSBC)进行醇解,得到可溶物(SP)与不溶物(ISP).GC/MS分析表明,SP中芳烃含量占比最大,质量分数为27.9%;其次是酚类化合物,说明含苯环的化合物在异丙醇醇解时更容易被提取.红外光谱表明,在脂肪族和芳香族区域ISP的吸收峰强度相对于原煤都有明显的升高,说明醇解过程破坏了煤的大分子结构,通过断键和醇解反应产生新的官能团.从TG-DTG曲线可以看出,原煤失重率比ISP大,两者在400～500℃温度段内出现的第二个失重速率峰,其中WSBC在450℃失重速率达到最大,而ISP最大失重速率所对应温度向右移动(480℃),两样品在第二个失重峰温度区间内的热解反应最为剧烈,归属于有机质的热裂解和大量挥发.Py-GC/MS结果表明,WSBC与ISP在450℃热解产物中可检测的化合物均以脂肪烃和含氧化合物为主,醇解使含氧化合物明显下降,但是对ISP中含氮类化合物脱除不明显.
Composition of the alkanolyses soluble portion and pyrolytic products distribution of the insoluble portion from Wucaiwan sub-bituminous coal
Wucaiwan sub-bituminous coal(WSBC)was subjected to alkanolysis using isopropanol as solvent at 300℃,and the soluble(SP)and insoluble(ISP)compounds were obtained.The GC/MS analysis showed that the aromatic content of SP accounted for the largest percentage of the total amount of SP,which was 27.9%,followed by phenolic compounds,which indicated that the compounds containing benzene rings were more easily extracted during the isopropanol alkanolysis.The infrared spectra showed that the intensity of the absorption peaks of ISP in both aliphatic and aromatic regions increased significantly relative to that of the original coal,suggesting that the alkanolysis process destroyed the macromolecular structure of the coal,and generated new functional groups through bond breaking and alkanolysis reactions.From the TG-DTG curves,it could be seen that the weight loss rate of the raw coal was larger than that of ISP,and the second weight loss rate peak appeared in the temperature range of 400-500℃for both of them,in which the weight loss rate of WSBC reached the maximum at 450℃,and the temperature corresponding to the peak of the maximum weight loss rate of ISP was shifted to the right(480℃).The pyrolysis reaction of both samples was the most intense in the temperature interval of the second weight loss peak,which was attributed to the thermal cracking of the organic matter and a large amount of volatilization.The results of the Py-GC/MS showed that the detectable compounds in the pyrolysis products of WSBC and ISP at 450℃were mainly aliphatic hydrocarbons and oxygenated compounds,and alkanolysis led to a significant decrease in oxygenated compounds,but did not obviously remove nitrogenous compounds from ISP.

sub-bituminous coalalkanolysescomposition and structural characteristicsrapid pyrolysisgaschromatography/mass spectrometry(GC/MS)

焦锟鹏、赵子涛、犹成裔、莫文龙、郭凤娇、杨晓勤、张书培、郭佳、魏贤勇、樊星、AKRAM Naeem

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新疆大学化工学院,省部共建碳基能源资源化学与利用国家重点实验室,煤炭清洁转化与化工过程新疆维吾尔自治区重点实验室,新疆乌鲁木齐 830046

新疆宜化化工有限公司,新疆昌吉 831700

新疆能源(集团)有限公司,新疆乌鲁木齐 830000

中国矿业大学煤炭加工与高效利用教育部重点实验室,江苏徐州 221116

山东科技大学化学与生物工程学院,山东青岛 266590

明哈吉大学拉合尔分校化工学院,巴基斯坦旁遮普拉合尔 54000

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次烟煤 醇解 组成与结构特征 快速热解 气相色谱/质谱

新疆维吾尔自治区区域协同创新专项新疆维吾尔自治区自然科学基金新疆宜化化工有限公司科技研发项目新疆能源(集团)有限责任公司科技研发项目

2022E010572021D01C099

2024

10.16085/j.issn.1000-6613.2023-2250

化工进展
中国化工学会,化学工业出版社

化工进展

CSTPCD北大核心
影响因子：1.062
ISSN：1000-6613
年,卷(期)：2024.43(5)
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