Pyrolysis Products Distribution of Enzymatic Hydrolysis Lignin with/without Steam Explosion Treatment by Py-GC/MS

Dong, Yuguo; Lu, Xinyu; Hu, Chengjuan; Li, Liang; Hu, Qixiang; Wang, Dandan; Xu, Chaozhong; Gu, Xiaoli

doi:10.3390/catal10020187

Open AccessArticle

Pyrolysis Products Distribution of Enzymatic Hydrolysis Lignin with/without Steam Explosion Treatment by Py-GC/MS

by

Yuguo Dong

,

Xinyu Lu

,

Chengjuan Hu

,

Liang Li

,

Qixiang Hu

,

Dandan Wang

,

Chaozhong Xu

and

Xiaoli Gu

^*

Co-Innovation Center for Efficient Processing and Utilization of Forest Products, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China

^*

Author to whom correspondence should be addressed.

Catalysts 2020, 10(2), 187; https://doi.org/10.3390/catal10020187

Submission received: 15 January 2020 / Revised: 28 January 2020 / Accepted: 1 February 2020 / Published: 5 February 2020

(This article belongs to the Special Issue Catalysis in Lignocellulosic Biomass Conversion)

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Abstract

This paper investigated the pyrolytic behaviors of enzymatic hydrolysis lignin (EHL) and EHL treated with steam explosion (EHL-SE) by pyrolysis-gas chromatography/mass spectrometer (Py-GC/MS). It was shown that the main component of the pyrolysis products was phenolic compounds, including G-type, H-type, S-type, and C-type phenols. With different treatment methods, the proportion of units in phenolic products had changed significantly. Meanwhile, proximate, elemental, and FTIR analysis of both lignin substrates were also carried out for a further understanding of the lignin structure and composition with or without steam explosion treatment. FTIR result showed that, after steam explosion treatment, the fundamental structural framework of the lignin substrate was almost unchangeable, but the content of lignin constituent units, e.g., hydroxyl group and alkyl group, evidently changed. It was noticeable that 2-methoxy-4-vinylphenol with 11% relative content was the most predominant pyrolytic product for lignin after steam explosion treatment. Combined with the above analysis, the structural change and pyrolysis product distribution of EHL with or without steam explosion treatment could be better understood, providing more support for the multi-functional utilization of lignin.

Keywords: enzymatic hydrolysis lignin; steam explosion; phenolic compounds; Py-GC/MS

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MDPI and ACS Style

Dong, Y.; Lu, X.; Hu, C.; Li, L.; Hu, Q.; Wang, D.; Xu, C.; Gu, X. Pyrolysis Products Distribution of Enzymatic Hydrolysis Lignin with/without Steam Explosion Treatment by Py-GC/MS. Catalysts 2020, 10, 187. https://doi.org/10.3390/catal10020187

AMA Style

Dong Y, Lu X, Hu C, Li L, Hu Q, Wang D, Xu C, Gu X. Pyrolysis Products Distribution of Enzymatic Hydrolysis Lignin with/without Steam Explosion Treatment by Py-GC/MS. Catalysts. 2020; 10(2):187. https://doi.org/10.3390/catal10020187

Chicago/Turabian Style

Dong, Yuguo, Xinyu Lu, Chengjuan Hu, Liang Li, Qixiang Hu, Dandan Wang, Chaozhong Xu, and Xiaoli Gu. 2020. "Pyrolysis Products Distribution of Enzymatic Hydrolysis Lignin with/without Steam Explosion Treatment by Py-GC/MS" Catalysts 10, no. 2: 187. https://doi.org/10.3390/catal10020187

APA Style

Dong, Y., Lu, X., Hu, C., Li, L., Hu, Q., Wang, D., Xu, C., & Gu, X. (2020). Pyrolysis Products Distribution of Enzymatic Hydrolysis Lignin with/without Steam Explosion Treatment by Py-GC/MS. Catalysts, 10(2), 187. https://doi.org/10.3390/catal10020187

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Pyrolysis Products Distribution of Enzymatic Hydrolysis Lignin with/without Steam Explosion Treatment by Py-GC/MS

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