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

    Access Status
    Fulltext not available
    Authors
    Nizamuddin, S.
    Siddiqui, M.
    Baloch, H.
    Mujawar, Mubarak
    Griffin, G.
    Madapusi, S.
    Tanksale, A.
    Date
    2018
    Type
    Journal Article
    
    Metadata
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    Citation
    Nizamuddin, S. and Siddiqui, M. and Baloch, H. and Mujawar, M. and Griffin, G. and 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.
    Source Title
    Environmental Science and Pollution Research
    DOI
    10.1007/s11356-018-1876-7
    ISSN
    0944-1344
    School
    Curtin Malaysia
    URI
    http://hdl.handle.net/20.500.11937/68025
    Collection
    • Curtin Research Publications
    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 m 2 /g (rice husk) to 92.6832 m 2 /g (hydrochar). Thermal stability of hydrochar was improved from 340 °C for rice husk to 370 °C for hydrochar.

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