The effects of hydrothermal carbonization operating parameters on high-value hydrochar derived from beet pulp

RENEWABLE ENERGY

卷:177

Article

Wilk, Malgorzata¹  Sliz, Maciej¹  Gajek, Marcin² 

[1] AGH Univ Sci & Technol, Dept Heat Engn & Environm Protect, Mickiewicza 30 Av, PL-30059 Krakow, Poland

[2] AGH Univ Sci & Technol, Fac Mat Sci & Ceram, Mickiewicza 30 Av, PL-30059 Krakow, Poland

关键词: Hydrothermal carbonization;    Organic waste;    Thermal analysis;    Hydrochar;    Biomass;    Beet pulp;   

DOI  :  10.1016/j.renene.2021.05.112

来源: Elsevier

【 摘 要 】

Beet pulp is an extremely very wet organic waste derived from sugar production. It can be utilized for energy purposes, e.g. biogas production or as very valuable fodder for animals, mainly horses. The high moisture content (80%) in beet pulp makes it an adequate feedstock for the hydrothermal carbonization process. Therefore, this study is focussed on the hydrothermal carbonization of beet pulp. The following parameters were studied: temperatures of 180, 200, and 220 degrees C through 1, 2, 3, and 4 h of residence time. The optimal conditions of the process were determined (220 degrees C and 1 h), based on the physical and chemical properties of solid product hydrochar. The ultimate and proximate analyses, high heating value, energy and mass yields, and energy densification ratio were investigated. The obtained hydrochars were of a coal-like solid biofuel, with high heating values much higher than raw feedstock (c.a. 150% higher). The combustion performance and kinetics of hydrochar based on TGA were determined, indicating better combustion. Moreover, the fibre analysis of hydrochar, supported by infrared spectra and scanning microscope analysis confirmed the changes in its structure. Concluding, organic waste, beet pulp, is of great potential as an energy source using the hydrothermal pretreatment process. (C) 2021 The Author(s). Published by Elsevier Ltd.

【 授权许可】

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