| 低分子化合物与煤的氮吸附行为 |
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| 引用本文： | 曹升玲,侯玉亭,张玉贵,王旭.低分子化合物与煤的氮吸附行为[J].煤炭转化,2010,33(3). |
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| 作者姓名： | 曹升玲 侯玉亭 张玉贵 王旭 |
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| 作者单位： | 1. 兖矿集团南屯煤矿,273515,山东邹城
2. 河南理工大学安全科学与工程学院,454003,河南焦作 |
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| 基金项目： | 国家高技术研究发展计划项目，国家自然科学基金资助项目 |
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| 摘 要： | 煤的分子结构与瓦斯吸附性能关系密切.采用正己烷、苯、氯仿、四氢呋喃和吡啶等五种极性依次增强的溶剂,对平顶山烟煤进行索氏萃取,测试原煤及其不同极性溶剂萃余物的氮吸附行为,研究煤中低分子化合物对煤氮吸附行为的影响.结果表明,五种溶剂的萃取率依次增加,当相对压力pr(pr指吸附平衡压力与吸附质饱和蒸汽压比值)小于0.1时,五种溶剂萃余物的吸附量依次升高,当pr大于0.1时,苯、氯仿萃余物的吸附量迅速增高,明显大于四氢呋喃萃余物的吸附量.据此推测,煤中低分子化合物的含量和组成不仅改变了煤的孔径分布,还改变了煤的表面性质,其中可溶性极性芳烃化合物对煤的吸附行为影响最大,含氧和氮的杂环芳烃混合物次之,饱和烃类化合物影响最小.
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| 关 键 词： | 低分子化合物 溶剂萃取 氮吸附 表面性能 |
EFFECT OF LOW MOLECULAR WEIGHT COMPOUNDS IN COAL STRUCTURE ON BEHAVIOR OF COAL-NITROGEN ADSORPTION |
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| Cao Shengling,Hou Yuting,Zhang Yugui,Wang Xu.EFFECT OF LOW MOLECULAR WEIGHT COMPOUNDS IN COAL STRUCTURE ON BEHAVIOR OF COAL-NITROGEN ADSORPTION[J].Coal Conversion,2010,33(3). |
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| Authors: | Cao Shengling Hou Yuting Zhang Yugui Wang Xu |
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| Abstract: | The capability of methane absorbed by coal has a close relation with the molecular structure of coal. In order to study the effect of low molecular weight compounds in coal on behaviors of coal-nitrogen adsorption,Pingdingshan bituminous coal were extracted with five kinds of organic solvents using Soxhlet extraction,the solvents including n-hexane,benzene,chloroform,tetrahydrofuran and pyridine,and the polarity of solvents increased in turn,whereafter,the raw coal and its residuals adsorption behaviors of ... |
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| Keywords: | low-molecular-weight compounds solvents extraction adsorption behaviors surface properties |
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