Combustion kinetics of hydrochar produced from hydrothermal carbonisation of Karanj (Pongamia pinnata) fruit hulls via thermogravimetric analysis. (October 2015)

• Record Type: Journal Article
• Authors: Islam, Md. Azharul; Kabir, G.; Asif, M.; Hameed, B.H.
• Is Part Of: Bioresource technology. Volume 194(2015)
• Page Start: 14
• Page End: 20
• Publication Date: 2015-10
• Subjects: Hydrothermal carbonisation -- Hydrochar -- Thermogravimetric analysis -- Karanj fruit hulls -- Isoconversional kinetics; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2015.06.094
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Karanj fruit hulls (KFH) hydrochar combustion profiles were developed. Two isoconversional methods were applied for kinetic data evaluation. The KFH hydrochar combustion follows multi-steps kinetics. Diffusion mechanisms controlled the combustion reactions. Abstract: This study examined the combustion profile and kinetics of hydrochar produced from hydrothermal carbonisation (HTC) of Karanj fruit hulls (KFH). The HTC-KFH hydrochar combustion kinetics was investigated at 5, 10, and 20 °C/min by thermogravimetric analysis. The kinetics model, Kissinger–Akahira–Sunose revealed the combustion kinetics parameters for the extent of conversion from 0.1 to 0.8; the activation energy varies from 114 to 67 kJ/mol respectively. The hydrochar combustion followed multi-steps kinetics; the Coats–Redfern models predicted the activation energies and pre-exponential constants for the hydrochar combustion zones. The diffusion models are the effective mechanism in the second and third zone.