Structural characterization of the thermal extracts of lignite
Structural characterization of the thermal extracts of lignite
复制标题
褐煤热提取物的结构表征
DOI：
10.1016/j.fuproc.2013.11.017
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发表时间：
2014-04
影响因子：
7.5
通讯作者：
Hu, Jingchen
中科院分区：
文献类型：
--
作者：
Lei, Zhiping;Kang, Shigang;Wei, Cheng;Hu, Jingchen
非特异性溶剂高温热萃取是一种很有潜力的煤中有机物分离技术，特别是褐煤等低阶煤。采用柱层析结合四氢呋喃（THF）索氏萃取的方法，对先锋褐煤（XL）在甲苯/甲醇（3：1，体积比）混合溶剂中300 °C的热抽提物（TES）进行了分离。通过元素分析、FTIR、1H NMR和GC/MS等手段对这些亚组分进行了表征，共鉴定出C12- 30高级脂肪烃、芳烃、C17- 27脂肪酸甲酯等78种化合物。作为两组主要组分，HAH和FAME是XL中的固有组分，除了在TE过程中通过酯化和酯交换反应产生的少量FAME之外。此外，TE的机制也被推测的TES的表征结果。结果表明，非特异性溶剂高温萃取不仅可以提高褐煤中有机物的萃取率，而且可以从褐煤中提取出多羟基芳烃和脂肪酸甲酯等化学品。
Thermal extraction (TE) with nonspecific solvent at high temperature is a potential technology to separate organic materials from coal, especially low-rank coal such as lignite. In this paper, thermal extract (TES) of Xianfeng lignite (XL) in toluene/methanol (3:1, volume) mixed solvent at 300 °C was separated into different sub-fractions by the method of column chromatography combined with Soxhlet extraction in tetrahydrofuran (THF). These sub-fractions were characterized by element analysis, FTIR,1H NMR and GC/MS. 78 compounds including C12–30higher aliphatic hydrocarbons (HAHs), aromatic hydrocarbons (AHs), C17–27fatty acid methyl esters (FAMEs) and other heteroatomic compounds were identified from the TES. As two groups of predominant components, HAHs and FAMEs are the intrinsic components in XL except for small amount of FAMEs produced by esterification and transesterification reactions in the TE process. Further, the mechanism of TE was also speculated by the characterization results of TES. As a result, the TE with nonspecific solvent at high temperature can not only improve the extract yield of organic materials, but also obtain chemicals such as HAHs and FAMEs from lignite.
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DOI：
--
发表时间：
1998-12
期刊：
Advances in Nanoparticles
影响因子：
--
作者：
K. Miura;M. Shimada;K. Mae
通讯作者：
K. Miura;M. Shimada;K. Mae
影响因子：
7.5
作者：
Nasir, Saqib;Sarfaraz, Tahira B.;Chaffee, A. L.
通讯作者：
Chaffee, A. L.
合成气下褐煤和锯末的共液化
影响因子：
7.5
作者：
Guo, Zhenxing;Bai, Zongqing;Li, Wen
通讯作者：
Li, Wen
影响因子：
5.3
作者：
G. Dyrkacz;C. Bloomquist
通讯作者：
G. Dyrkacz;C. Bloomquist
影响因子：
7.4
作者：
P. Kuznetsov;V. I. Sharypov;A. I. Rubaylo;E. D. Korniyets
通讯作者：
P. Kuznetsov;V. I. Sharypov;A. I. Rubaylo;E. D. Korniyets