• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>ISIJ international >Changes of Aromatic CH and Aliphatic CH in In-situ FT-IR Spectra of Bituminous Coals in the Thermoplastic Range
【24h】

Changes of Aromatic CH and Aliphatic CH in In-situ FT-IR Spectra of Bituminous Coals in the Thermoplastic Range

机译：热塑性范围内烟煤原位FT-IR光谱中芳香族CH和脂肪族CH的变化

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The change in aromatic CH (3 030-2 950 cm~(-1)) and aliphatic CH (2 920-2 850 cm~(-1)) of raw and heated coals in the thermoplastic region was investigated by Fourier transform infrared spectroscopy (FT-IR). It was confirmed that the aliphatic CH abundant in coals of high volatiles is closely related to the maximum fluidity of raw coals. The peak area ratio of aromatic CH to aliphatic CH (A_(arcCH)/A_(aliCH)) has close relationship with mean reflectance and aromaticity of raw coals. Aliphatic CH and aromatic CH decreased while A_(aroCH)//A_(aliCH) increased with increasing temperature in the thermoplastic range. However, the decomposition trend of each coal clearly showed different features. The coal of low fluidity consumed aliphatic hydrogen to release volatile even before entering thermoplastic region while the coal of high fluidity gradually consumed aliphatic hydrogen all through the thermoplastic region even though they have similar volatiles. The difference in decomposition trend of hydrocarbon resulted in different condensation pattern. In addition, according to the application of 2D correlation spectroscopy for analyzing the spectral change of each coal in thermoplastic region, the relations between R_3CH and RCH_3 (2 910 cm~(-1), 2 958 cm~(-1)) and between R_2CH_2 and RCH_3 (2 923 cm~(-1), 2 958 cm~(-1)) were different. It was suggested that the coal properties was correlated with the different decomposition trend and fluidity.
机译：用傅里叶变换红外光谱法研究了热区原煤和加热煤的芳烃CH（3 030-2 950 cm〜（-1））和脂肪族CH 2 920-2 850 cm〜（-1）的变化。 （FT-IR）。可以确定的是，高挥发分煤中富含的脂肪族CH与原煤的最大流动性密切相关。芳香族CH与脂肪族CH的峰面积比（A_（arcCH）/ A_（aliCH））与原煤的平均反射率和芳香性密切相关。在热塑性范围内，随着温度的升高，脂肪族CH和芳香族CH降低，而A_（aroCH）// A_（aliCH）升高。但是，每种煤的分解趋势明显显示出不同的特征。低流动性的煤甚至在进入热塑性区域之前就消耗了脂肪族氢以释放出挥发物，而高流动性的煤即使具有相似的挥发性，也逐渐在整个热塑性区域中消耗了脂肪族氢。碳氢化合物分解趋势的差异导致了不同的冷凝模式。此外，根据二维相关光谱法在分析热塑性区域中每种煤的光谱变化中的应用，R_3CH和RCH_3（2 910 cm〜（-1），2 958 cm〜（-1））之间以及之间的关系R_2CH_2和RCH_3（2 923 cm〜（-1），2958 cm〜（-1））不同。提示煤的性质与分解趋势和流动性的不同有关。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号