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    Low-Temperature Deoxidization of Lignin and Its Impact on Liquid Products from Pyrolysis (2020)

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    Type of Content
    Journal Article
    UC Permalink
    https://hdl.handle.net/10092/100647
    
    Publisher's DOI/URI
    https://doi.org/10.1021/acs.energyfuels.0c00202
    
    Publisher
    American Chemical Society (ACS)
    ISSN
    0887-0624
    1520-5029
    Language
    English
    Collections
    • Engineering: Journal Articles [1535]
    Authors
    Mei, Y.
    Zhang, S.
    Wang, H.
    Jing, S.
    Hou, T.
    Pang, Shusheng
    show all
    Abstract

    In this study, low temperature deoxidization of lignin at temperature range of 200~390°C as a pretreatment method had been exploited to gain high quality pyrolysis products. A two-dimensional infrared correlation spectroscopy (2D-PCIS) was used to analyze the evolution of the functional groups of lignin in the process of low temperature deoxidization, and the deoxidized samples were pyrolysed in the pyrolysis gas chromatography mass spectrometry (Py-GC/MS). The results of 2D-PCIS showed that the decomposition of the lignin was accelerated from 320 °C and which was dominated by the elimination reaction. Notably, aromatization reaction was intensified at 350 °C, whereas the structure of lilac aromatic ring was more stable than the guaiac aromatic. It was also found that the alcohol hydroxyl group was significantly removed, and due to this removal other functional groups also underwent changes during the deoxidization. The results from Py-GC/MS experiments showed that deoxidization treatment at lower than 230 °C had insignificant effect on the pyrolysis products. However, when the deoxidization temperature was at 230°C and above, the oxygen-containing compounds in the pyrolysis liquid products (mainly phenols) decreased significantly, and when the deoxidization temperature was above 290 °C, hydrocarbons were the main compounds in the pyrolysis liquid product.

    Citation
    Mei Y, Zhang S, Wang H, Jing S, Hou T, Pang S Low-Temperature Deoxidization of Lignin and Its Impact on Liquid Products from Pyrolysis. Energy & Fuels.
    This citation is automatically generated and may be unreliable. Use as a guide only.
    Keywords
    Lignin; Pretreatment; Deoxidization; 2D-PCIS; Pyrolysis
    ANZSRC Fields of Research
    40 - Engineering::4004 - Chemical engineering::400402 - Chemical and thermal processes in energy and combustion
    30 - Agricultural, veterinary and food sciences::3007 - Forestry sciences::300705 - Forestry biomass and bioproducts
    Rights
    All rights reserved unless otherwise stated
    http://hdl.handle.net/10092/17651

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