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Behaviors and interactions during hydrothermal carbonization of protein, cellulose and lignin

文献类型： 外文期刊

作者： Liu, Ziyun 1 ; Zhao, Lixin 2 ; Yao, Zonglu 2 ; Jia, Jixiu 1 ; Wang, Zihan 1 ; Liu, Zhidan 1 ;

作者机构： 1.China Agr Univ, Coll Water Resources & Civil Engn, Lab Environm Enhancing Energy E2E, Key Lab Agr Engn Struct & Environm,Minist Agr & Ru, Beijing 100083, Peoples R China

2.Minist Agr & Rural Affairs PR China, Inst Environm & Sustainable Dev Agr, Key Lab Low carbon Green Agr North China, CAAS, Beijing 100081, Peoples R China

关键词： Hydrothermal carbonization; Nitrogen-rich biomass; Protein; Model chemicals; Interaction mechanism; Hydrochar

期刊名称：CHEMICAL ENGINEERING JOURNAL （ 影响因子：15.1； 五年影响因子：14.3 ）

ISSN： 1385-8947

年卷期： 2023 年 476 卷

页码：

收录情况： SCI

摘要： Proteins participation will inevitably reconstruct the conversion route of lignocellulosic components and the formation of N-containing hydrochar during hydrothermal carbonization process. Herein, the behaviors and interaction mechanisms of protein, and typical biomass model chemicals (i.e. cellulose and lignin) were in-depth investigated. Results showed that the interaction of the binary mixture led to a reduction of hydrochar yield, but increased nitrogen concentration in hydrochar. Nitrogenous heterocyclic structure of hydrochar increased due to the interaction of protein with cellulose/lignin via forming Schiff bases and melanoids, wherein the content graphitic and pyridine nitrogen in protein-lignin hydrochar substantially increased from 5.4 % and 2.3 % to 9.7 % and 25.8 %, respectively. The increased I-D/I-G value from 0.81 to 0.91 in cellulose-protein hydrochar indicated the concentration of fused aromatic rings (>= 6) based on Raman analysis. Carbon defects and disordered structure in hydrochar dramatically grew with the occurrence of the Maillard reaction and aldol-condensation of the intermediates. The nitrogenous substance in the aqueous phase increased by 30 %, resulted from protein decomposition accelerated by the hydrolysis of cellulose. This study provides a full understanding towards the transformation process of hydrochar from protein-containing biomass.

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