低阶煤中含氧官能团分布的研究

周剑林; 王永刚; 黄鑫; 张书; 林雄超

低阶煤中含氧官能团分布的研究

中国矿业大学(北京)化学与环境工程学院, 北京 100083

基金项目: 国家自然科学基金(21076222)。

详细信息

通讯作者:
王永刚(1960-),男,教授,主要研究方向为煤化学及煤的转化利用。Tel:010-62339882,E-mail:wyg1960@126.com。

中图分类号: TQ533.9
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- 文章访问数: 2244
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出版历程
- 收稿日期: 2012-09-11
- 修回日期: 2012-12-01
- 刊出日期: 2013-02-28

Determination of O-containing functional groups distribution in low-rank coals by chemical titration

School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China

摘要

摘要: 采用化学法测定了四种典型中国低阶煤中羧基、醇羟基、酚羟基、甲氧基和羰基含氧官能团。其中,羧基的定量分析采用醋酸钙溶液和pH值为8.3的缓冲溶液进行,分析了测定条件对羧基和酸性含氧官能团测定结果的影响。结果表明,在N₂气氛下比空气条件下测定羧基含量准确,褐煤中羧酸根的主要存在形式为羧酸盐,酸洗后煤样中酚羟基的测定值随着离子交换溶液pH值的增加而增大;褐煤中的含氧官能团主要是羧基和羟基,分别占总氧量的34.49%和34.79%;在不同低阶煤中存在不同含量的羰基,甲氧基含量较小。
- 低阶煤 /
- 含氧官能团 /
- 赋存状态 /
- 化学滴定法
Abstract: Distribution of oxygen-functional groups (carboxyl, alcohol-hydroxyl, phenol-hydroxyl, methoxyl and carbonyl) in 4 Chinese low-rank coals was evaluated based on chemical analysis. Concentration of carboxyl was quantitated by acetic acid calcium ion exchange method and the buffer (pH=8.3). The effect of analysis condition on the concentration of carboxyl and total acidity was studied. The results show that the reliable results are obtained in N₂ atmosphere other than in air. The occurrence of carboxyl in coal is carboxylate. When quantitating the concentration of phenol-hydroxyl in the acid-washing brown coal with ion exchanged method, its concentration increases with increasing pH value. Concentration of carboxyl and hydroxyl account for 34.49% and 34.79%, respectively, in the total oxygen for the dry ash free basis brown coal. Different concentrations of carbonyl exist in the low-rank coals, but that of methoxyl is little.
- low-rank coal /
- O-containing functional groups /
- occurrence /
- chemical titration

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参考文献(19)

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低阶煤中含氧官能团分布的研究

通讯作者:
王永刚(1960-),男,教授,主要研究方向为煤化学及煤的转化利用。Tel:010-62339882,E-mail:wyg1960@126.com。

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Determination of O-containing functional groups distribution in low-rank coals by chemical titration

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低阶煤中含氧官能团分布的研究

通讯作者: 王永刚(1960-),男,教授,主要研究方向为煤化学及煤的转化利用。Tel:010-62339882,E-mail:wyg1960@126.com。

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出版历程

Determination of O-containing functional groups distribution in low-rank coals by chemical titration

计量

出版历程

目录

2023年《燃料化学学报（中英文）》评优结果公布！

通讯作者:
王永刚(1960-),男,教授,主要研究方向为煤化学及煤的转化利用。Tel:010-62339882,E-mail:wyg1960@126.com。