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首页> 外文期刊>Bioenergy research >Characterization of Endocarp Biomass and Extracted Lignin Using Pyrolysis and Spectroscopic Methods
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Characterization of Endocarp Biomass and Extracted Lignin Using Pyrolysis and Spectroscopic Methods

机译：热解和光谱法表征内果皮生物质和提取的木质素

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摘要

Pyrolysis-GC/mass spectrometry (Py-GC/MS) and thermogravimetric analysis (TGA) was used to analyze the thermal decomposition of several endocarp sources, namely, coconut shells, walnut shells, peach pits, and olive pits, as well as their respective lignin fractions. To determine whether extraction procedures influenced pyrolysate composition and thermal decomposition processes, lignin was extracted from these feedstocks using two different procedures based on the use of formic acid and sulfuric acid (National Renewable Energy Laboratory (NREL) laboratory analytical procedure), after which the lignin-derived pyrolysates and TGA profiles were compared. Qualitative analysis of the distribution of pyrolysates provided predictive information about the structure and composition of the lignin in each sample. Results suggest that the lignin extract pyrolysates contained a different distribution of linkages and monomers in comparison to the non-extracted biomass, suggesting that lignin processing can influence bio-oil composition. Moreover, we identify the types of products obtainable by pyrolysis of these feedstocks and their lignin extracts. Heteronuclear single quantum coherence nuclear magnetic resonance spectroscopy (HSQC NMR) and Fourier transform infrared spectroscopy (FTIR) were also used to elucidate the structures of the extracted lignin samples.
机译：使用热解GC /质谱（Py-GC / MS）和热重分析（TGA）来分析几种内果皮来源的热分解，这些内果皮来源是椰子壳，核桃壳，桃核和橄榄核，以及它们的各自的木质素部分。为了确定提取程序是否影响了热解产物的组成和热分解过程，基于甲酸和硫酸的使用，两种不同的程序（国家可再生能源实验室（NREL）实验室分析程序）从这些原料中提取了木质素，此后，木质素比较了热解产物和TGA谱。对热解产物分布的定性分析提供了有关每个样品中木质素的结构和组成的预测信息。结果表明，与未提取的生物质相比，木质素提取物的热解产物包含不同的键和单体分布，这表明木质素加工可影响生物油的组成。此外，我们确定了通过热解这些原料及其木质素提取物可获得的产品类型。异核单量子相干核磁共振波谱（HSQC NMR）和傅里叶变换红外光谱（FTIR）也用于阐明提取的木质素样品的结构。

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  • 来源
    《Bioenergy research》 |2015年第1期|350-368|共19页
  • 作者

    Anne E. Harman-Ware; Mark Crocker; Robert B. Pace; Andrew Placido; Samuel Morton III; Seth DeBolt;

  • 作者单位

    1.Center for Applied Energy Research University of Kentucky 2540 Research Park Drive Lexington KY 40511 USA 2.Department of Chemistry University of Kentucky Lexington KY 40506 USA;

    1.Center for Applied Energy Research University of Kentucky 2540 Research Park Drive Lexington KY 40511 USA 2.Department of Chemistry University of Kentucky Lexington KY 40506 USA;

    1.Center for Applied Energy Research University of Kentucky 2540 Research Park Drive Lexington KY 40511 USA;

    1.Center for Applied Energy Research University of Kentucky 2540 Research Park Drive Lexington KY 40511 USA;

    3.Department of Engineering James Madison University Harrisonburg VA 22807 USA;

    4.Department of Horticulture University of Kentucky Lexington KY 40546 USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Lignin Pyrolysis-GC/MS Endocarp Extraction Formic acid;

    机译：木质素热解-GC / MS内果皮萃取甲酸;

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