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

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Type of Content
Journal ArticlePublisher
American Chemical Society (ACS)ISSN
0887-06241520-5029
Language
EnglishCollections
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; PyrolysisANZSRC Fields of Research
40 - Engineering::4004 - Chemical engineering::400402 - Chemical and thermal processes in energy and combustion30 - Agricultural, veterinary and food sciences::3007 - Forestry sciences::300705 - Forestry biomass and bioproducts
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