Upgradation of chemical, fuel, thermal, and structural properties of rice husk through microwave-assisted hydrothermal carbonization

Nizamuddin, S, Siddiqui, M, Baloch, H, Mubarak, N, Griffin, G, Madapusi, S and Tanksale, A 2018, 'Upgradation of chemical, fuel, thermal, and structural properties of rice husk through microwave-assisted hydrothermal carbonization', Environmental Science and Pollution Research, vol. 25, no. 18, pp. 17529-17539.


Document type: Journal Article
Collection: Journal Articles

Title Upgradation of chemical, fuel, thermal, and structural properties of rice husk through microwave-assisted hydrothermal carbonization
Author(s) Nizamuddin, S
Siddiqui, M
Baloch, H
Mubarak, N
Griffin, G
Madapusi, S
Tanksale, A
Year 2018
Journal name Environmental Science and Pollution Research
Volume number 25
Issue number 18
Start page 17529
End page 17539
Total pages 11
Publisher Springer
Abstract The process parameters of microwave hydrothermal carbonization (MHTC) have significant effect on yield of hydrochar. This study discusses the effect of process parameters on hydrochar yield produced from MHTC of rice husk. Results revealed that, over the ranges tested, a lower temperature, lower reaction time, lower biomass to water ratio, and higher particle size produce more hydrochar. Maximum hydrochar yield of 62.8% was obtained at 1000 W, 220 °C, and 5 min. The higher heating value (HHV) was improved significantly from 6.80 MJ/kg of rice husk to 16.10 MJ/kg of hydrochar. Elemental analysis results showed that the carbon content increased and oxygen content decreased in hydrochar from 25.9 to 47.2% and 68.5 to 47.0%, respectively, improving the energy and combustion properties. SEM analysis exhibited modification in structure of rice husk and improvement in porosity after MHTC, which was further confirmed from BET surface analysis. The BET surface area increased from 25.0656 m2/g (rice husk) to 92.6832 m2/g (hydrochar). Thermal stability of hydrochar was improved from 340 °C for rice husk to 370 °C for hydrochar.
Subject Non-automotive Combustion and Fuel Engineering (incl. Alternative/Renewable Fuels)
DOI - identifier 10.1007/s11356-018-1876-7
Copyright notice © Springer-Verlag GmBH Germany, part of Springer Nature 2018
ISSN 1614-7499
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