Molecular composition of extracts obtained by hydrothermal extraction of brown coal
Molecular composition of extracts obtained by hydrothermal extraction of brown coal
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DOI：
10.1016/j.fuel.2015.07.042
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发表时间：
2015-11
期刊：
影响因子：
7.4
通讯作者：
Qingxin Zheng;Masato Morimoto;Hiroaki Sato;T. Takanohashi
中科院分区：
文献类型：
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作者：
Qingxin Zheng;Masato Morimoto;Hiroaki Sato;T. Takanohashi
采用水热法在 350 °C、20 MPa 下萃取 90 分钟，提取三种褐煤，并通过高分辨率质谱测量详细分析沉积物提取物的分子组成。所有褐煤的萃取率高达~30%，表明水热萃取适用于不同灰分和硫含量的褐煤。通过 Kendrick 质量分析进行的高分辨率质量测量确定了从三种褐煤制备的所有提取物中的化学成分并阐明了常见分子种类的丰度。 LY、NM 和 YN 提取物质谱中重叠的 CnHm、CnHmO、CnHmO2、CnHmO3、CnHmO4 和 CnHmN 物质的质量强度总和分别为 37.0%、35.9% 和 50.8%，表明无论母煤如何，所有提取物中都存在丰富的具有相似分子组成的化合物。
Three brown coals were extracted by a hydrothermal method at 350 °C and 20 MPa for 90 min, and the molecular compositions of the deposit extracts were analyzed in detail by high-resolution mass spectrometry measurements. The extract yields were as high as ∼30% for all brown coals, indicating that hydrothermal extraction is applicable to brown coals with differing ash and sulfur contents. The high-resolution mass measurements with Kendrick mass analyses identified the chemical compositions and clarified the abundance of common molecular species in all the extracts prepared from the three brown coals. The sum of mass intensities of overlapped CnHm, CnHmO, CnHmO2, CnHmO3, CnHmO4, and CnHmN species in the mass spectra of LY, NM, and YN extracts were 37.0%, 35.9%, and 50.8%, respectively, indicating the presence of abundant compounds with similar molecular compositions in all of the extracts, regardless of the parent coal.