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

引用本文: 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[J]. 燃料化学学报, 2013, 41(2): 134-138. shu
Citation:  ZHOU Jian-lin, WANG Yong-gang, HUANG Xin, ZHANG Shu, LIN Xiong-chao. Determination of O-containing functional groups distribution in low-rank coals by chemical titration[J]. Journal of Fuel Chemistry and Technology, 2013, 41(2): 134-138. shu

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。
  • 基金项目:

    国家自然科学基金(21076222)。 (21076222)

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。

English

  • 
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  • 收稿日期:  2012-09-11
  • 网络出版日期:  2012-12-01
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