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FT-IR carbonyl bands of bio-oils: Importance of water

机译：生物油的FT-IR羰基谱带：水的重要性

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摘要

The most important feature of bio-oil is the high contents of various oxygen-containing functional groups. FT-IR spectroscopy is therefore one of the most powerful analytical techniques to characterise the composition of various bio-oils. In a recent study [1], we developed a method for the deconvolution of the carbonyl region (1490-1850 cm~1) of the FT-IR spectra of bio-oils into 9 Gaussian bands (1767,1740,1713,1696,1654,1606,1565, 1517, 1501 cm"1), each assigned to typical functional groups found in bio-oils. The method allows quantitative comparison of relative concentrations of various types of carbonyl functional groups among different bio-oils. Because the water absorption in this region is generally considered to be of relatively weak strength [2,3], our deconvolution method [1] did not consider the water absorption. However, further investigation showed that the absorption of water in this region may not be negligible. This is because of the high content of water in bio-oil, which varies with the pyrolysis conditions to produce the bio-oil, the type of biomass substrate (including moisture contents) and the treatment of bio-oil after pyrolysis. The letter aims to illustrate the importance of water absorption in the study of carbonyl functional groups in bio-oils, serving as a correction of our method outlined previously [1].
机译：生物油的最重要特征是各种含氧官能团的含量很高。因此，FT-IR光谱学是表征各种生物油成分的最强大的分析技术之一。在最近的研究中[1]，我们开发了一种将生物油的FT-IR光谱的羰基区域（1490-1850 cm〜1）解卷积为9个高斯谱带（1767,1740,1713,1696， 1654,1606,1565，1517，1501 cm“ 1），每个分配给生物油中发现的典型官能团。该方法可以定量比较不同生物油中各种羰基官能团的相对浓度。通常认为该区域的吸水强度较弱[2,3]，我们的反褶积方法[1]并未考虑吸水率，但进一步的研究表明该区域的吸水率可能微不足道。这是因为生物油中的水含量高，其随热解条件产生生物油，生物质底物的类型（包括水分含量）以及热解后生物油的处理而变化。来说明吸水的重要性对生物油中羰基官能团的研究，是对我们先前概述的方法的一种修正[1]。

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  • 来源
    《Fuel》 |2013年第10期|596-598|共3页
  • 作者

    Caroline Lievens; Daniel Mourant; Richard Gunawan; Xiang Li; Chun-Zhu Li;

  • 作者单位

    Fuel and Energy Technology Institute,Curtin University,CPO Box U1987,Perth, WA 6845, Australia;

    Fuel and Energy Technology Institute,Curtin University,CPO Box U1987,Perth, WA 6845, Australia;

    Fuel and Energy Technology Institute,Curtin University,CPO Box U1987,Perth, WA 6845, Australia;

    Fuel and Energy Technology Institute,Curtin University,CPO Box U1987,Perth, WA 6845, Australia;

    Fuel and Energy Technology Institute,Curtin University,CPO Box U1987,Perth, WA 6845, Australia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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