数字农科院2.0

Superheated steam as carrier gas and the sole heat source to enhance biomass torrefaction

文献类型： 外文期刊

作者： Dongdong Zhang;Xuejiao Chen;Zhiyong Qi;Hong Wang;Rui Yang;Wei Lin;Jie Li;Wanlai Zhou;Frederik Ronsse

作者机构：

关键词： Production efficiency; Superheated stream torrefaction; Torrefied biomass as biocoal; Wood shavings

期刊名称： Bioresour. Technol.

ISSN： 0960-8524

年卷期： 2021 年 331 卷

页码：

收录情况： JCR（2021版） ; EI（2021版）

摘要： Superheated steam (SHS) has been used as a carrier gas for pressurized steam torrefaction, steam explosion or pyrolysis, but is barely used as a heat source. However, SHS is superior in thermal capacity and heat transfer coefficient resulting in even heating and fast heating rates. Therefore, this work applied SHS as the sole heat source for torrefaction at ambient pressure. A setup was specially designed and capable of heating wood shavings at a rate >120 °C•min−1. Solid products were analyzed in many aspects and demonstrated the enhanced organics conversion owing to SHS torrefaction. Torrefied biomass was comparable to slow pyrolysis char in fuel quality and superior to that of conventional torrefactions. Moreover, SHS torrefaction was super-timesaving. A coal-like product (HHV of 27.84 MJ•kg−1) was achieved in only 15 min at 350 °C. Overall, SHS torrefaction boosted biomass densification and gave rise to greater production efficiency. © 2021 Elsevier Ltd

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