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Effect of severe torrefaction by superheated steam on pinewood pyrolysis kinetics and pyrolytic oil compounds

文献类型： 外文期刊

作者： Chen, Xuejiao 1 ; Wang, Hong 2 ; Yang, Rui 2 ; Lin, Wei 2 ; Qi, Zhiyong 2 ; Zhang, Dongdong 2 ;

作者机构： 1.Xihua Univ, Sch Food Sci & Bioengn, Chengdu 610039, Peoples R China

2.Chinese Acad Agr Sci, Inst Urban Agr, Chengdu, Peoples R China

关键词： Superheated steam torrefaction; Slow pyrolysis; Py-GCMS analysis; Platform chemicals; Pyrolytic oil

期刊名称：RENEWABLE ENERGY （ 影响因子：8.7； 五年影响因子：8.4 ）

ISSN： 0960-1481

年卷期： 2024 年 227 卷

页码：

收录情况： SCI

摘要： Hemicellulose, cellulose, lignin and extractives generally contribute a variety of compounds to pyrolytic oil during pyrolysis. Severe torrefaction process to remove those compounds may influence the diversity and quality of pyrolytic oil. In this study, pinewood, as a frequently studied biomass for pyrolysis research, was firstly torrefied by superheated steam (SHS) in different intensities prior to both slow pyrolysis and Py-GCMS. The kinetic study demonstrated that the activation energy of pyrolysis for the biomass increased greatly from 172.66 kJ mol(-1) to a maximum of 400.18 kJ mol(-1) after SHS torrefaction. The pyrolytic oil from both slow pyrolysis and Py-GCMS were analyzed. The content of hemicellulose and cellulose biomass reduced with increasing SHS torrefaction intensities. As a result, the light oxygenates, sugars and furans in pyrolytic oil decreased greatly, whereas the concentration of phenol and aromatics improved. In addition, the phenolic compounds shifted to smaller molecular weight and the acetic acid as an adverse factor in pyrolytic oil decreased and even disappeared under severe torrefaction. SHS torrefaction provide a new insight for biomass pretreatment for further pyrolysis.

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