Comparison study on fuel properties of hydrochars produced from corn stalk and corn stalk digestate

被引:62
|
作者
Zhang, Deli [1 ,2 ]
Wang, Fang [1 ,2 ]
Shen, Xiuli [1 ,2 ]
Yi, Weiming [1 ,2 ]
Li, Zhihe [1 ,2 ]
Li, Yongjun [1 ,2 ]
Tian, Chunyan [1 ,2 ]
机构
[1] Shandong Univ Technol, Sch Agr Engn & Food Sci, Zibo 255049, Shandong, Peoples R China
[2] Shandong Res Ctr Engn & Technol Clean Energy, Zibo 255049, Shandong, Peoples R China
基金
中国国家自然科学基金;
关键词
Hydrothermal carbonization; Corn stalk digestate; Hydrochar; Fuel property; Combustion; HYDROTHERMAL CARBONIZATION; COMBUSTION CHARACTERISTICS; LIGNOCELLULOSIC BIOMASS; WASTE BIOMASS; PYROLYSIS; KINETICS; PARAMETERS; CONVERSION; BEHAVIOR; BIOGAS;
D O I
10.1016/j.energy.2018.09.174
中图分类号
O414.1 [热力学];
学科分类号
摘要
In this study, hydrothermal carbonization (HTC) was employed to upgrade the fuel quality of corn stalk digestate (CSD) ranged from 190 to 240 degrees C. Meanwhile, a comparison of corn stalk (CS) was investigated to explore the effects of anaerobic digestion (AD) on the fuel property and combustion behavior of hydrochars. The results showed that the HTC increased the carbon content and heating value of hydrochars while decreased the alkali and alkaline earth metals (AAEMs) content and hydrophilicity. Compared to CS, the CSD showed higher low-temperature HTC activity, but lower sensitivity to temperature changes. The improvement of fuel properties on CSD was limited with the HTC temperature increasing. The thermogravimetric analysis displayed the relative low temperature HTC (190 and 215 degrees C) improved the combustion of CSD, while 240 degrees C was appropriate for CS. FTIR and SEM analyses confirmed the aromatization and formations of spherical particles in CS hydrochars obtained at 240 degrees C, respectively, but was not observed in CSD hydrochars. The AD process weakened the pyrolysis-like reaction of cellulose in HTC. Considering the energy balance and engineering, 190 degrees C was recommend for the preparation of solid fuels from CSD and seemed to be more viable for the combination of AD and HTC. (C) 2018 Elsevier Ltd. All rights reserved.
引用
收藏
页码:527 / 536
页数:10
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