Fuel properties and combustion behaviors of fast torrefied pinewood in a heavily loaded fixed-bed reactor by superheated steam

文献类型： 外文期刊

第一作者： Zhang, Dongdong

作者： Zhang, Dongdong;Yang, Rui;Wang, Hong;Lin, Wei;Zhou, Wanlai;Qi, Zhiyong;Han, Peilin;Yan, Zuoyi

作者机构：

关键词： SHS torrefaction; Uniform heating; Fuel properties; Combustion behaviors; Fuel alternatives

期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：9.642； 五年影响因子：9.237 ）

ISSN： 0960-8524

年卷期： 2021 年 342 卷

页码：

收录情况： SCI

摘要： Superheated steam (SHS) was capable of fast and uniformly torrefying heavily loaded biomass. This work detailedly investigated the torrefied biomass in terms of fuel property and combustion behavior. The reactor chamber (300 ml) was fully loaded with pinewood pellets (160 g). Overall residence times were 20, 40 and 60 min (including preheating and holding periods) under 225, 275 and 325 degrees C. Biomass was estimated by elements, TG, FTIR, HHV, fuel property, combustion and pyrolysis behaviors, combustion kinetics and moisture reabsorption. Holding period as short as 2 min at 325 degrees C with a heating rate of 15 degrees C-min- 1 was found to enhance energy density by 45% and generated homogeneous coal-like products with HHV of 26.76 MJ-kg- 1. Fixed carbon content increased to 64.84 wt%. The combustion activation energy increased to 79.66 kJ-mol- 1. Combustion indices and behaviors indicated that torrefied biomass had benign characteristics either for co-firing or as fuel. All suggests good potential of SHS torrefaction to obtain fuel alternatives.

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