Preparation of Solid Fuel Hydrochar over Hydrothermal Carbonization of Red Jujube Branch

Zhiyu Li, Weiming Yi, Zhihe Li, Chunyan Tian, Peng Fu, Yuchun Zhang, Ling Zhou and Jie Teng
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Zhiyu Li: School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255000, China
Weiming Yi: School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255000, China
Zhihe Li: School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255000, China
Chunyan Tian: School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255000, China
Peng Fu: School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255000, China
Yuchun Zhang: School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255000, China
Ling Zhou: College of Mechanic and Electrical Engineering, Tarim University, Alar 843300, China
Jie Teng: School of Agricultural Sciences, Jiangxi Agricultural University, Nanchang 330045, China

Energies, 2020, vol. 13, issue 2, 1-10

Abstract: Biomass energy is becoming increasingly important, owing to the decreasing supply of fossil fuels and growing environmental problems. Hydrothermal carbonization (HTC) is a promising technology for producing solid biofuels from agricultural and forestry residues because of its lower fossil-fuel consumption. In this study, HTC was used to upgrade red jujube branch (RJB) to prepare hydrochar at six temperatures (220, 240, 260, 280, 300, and 320 °C) for 120 min, and at 300 °C for 30, 60, 90, and 120 min. The results showed that the energy recovery efficiency (ERE) reached maximum values of 80.42% and 79.86% at a residence time of 90 min and a reaction temperature of 220 °C, respectively. X-ray diffraction results and Fourier transform infrared spectroscopy measurements show that the microcrystal features of RJB were destroyed, whereas the hydrochar contained an amorphous structure and mainly lignin fractions at increased temperatures. Thermogravimetric analysis shows that the hydrochar had better fuel qualities than RJB, making hydrochar easier to burn.

Keywords: red jujube branch; hydrothermal carbonization; hydrochar; energy recovery efficiency; solid fuel (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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