Suitability of rice straw for biochar production through slow pyrolysis: Product characterization and thermodynamic analysis

被引:60
|
作者
Sakhiya A.K. [1 ]
Anand A. [1 ]
Aier I. [1 ]
Vijay V.K. [1 ]
Kaushal P. [1 ]
机构
[1] Clean Energy Laboratory, Center for Rural Development and Technology, Indian Institute of Technology Delhi, 110016, New Delhi
关键词
Biochar production; Energy and Exergy analysis; Rice straw; Slow pyrolysis;
D O I
10.1016/j.biteb.2021.100818
中图分类号
学科分类号
摘要
The main objective of the present study is to turn the wheel from waste to wealth by sustainable rice straw management practices over field burning in India. For that, slow pyrolysis of rice straw was carried out in a fixed bed reactor. The result indicated an increase in process temperature (300–600 °C) led to the decreased biochar yield, while pH (8.28–11.4), pore-volume (0.0087–0.059 cm3/g), surface area (12.78–83.06 m2/g), and HHV (17.63–20.13 MJ/kg) of biochar increased. The maximum bio-oil yield was obtained at 500 °C, and its characterization study indicated a high amount of phenol and aromatic compounds. The composition of H2 (1.9–17.72%) and CH4 (2.3–8.82%) in the gas and heating value (6.5–9.4 MJ/Nm3) of the gas increased with temperature. The energy (84.22–89.61%) and exergy efficiency (74.41–87.37%) of the pyrolysis system increased with process temperature, and the thermodynamic optimization was achieved at 600 °C. © 2021
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