A thermogravimetric analysis of the combustion kinetics of karanja (Pongamia pinnata) fruit hulls char. (January 2016)

• Record Type: Journal Article
• Authors: Islam, Md. Azharul; Auta, M.; Kabir, G.; Hameed, B.H.
• Is Part Of: Bioresource technology. Volume 200(2016)
• Page Start: 335
• Page End: 341
• Publication Date: 2016-01
• Subjects: Combustion -- Kinetics -- Char -- Non-isothermal -- Thermogravimetry; 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.2015.09.057
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: TGA thermographs traced the KFH-char combustion behaviours. Char weight loss shift to higher temperature zones with increasing heating rates. Isoconversional methods authenticated the KFH-char combustion kinetics. Reaction order and diffusion models dictated the multi-step char combustion. Abstract: The combustion characteristics of Karanj fruit hulls char (KFH-char) was investigated with thermogravimetry analysis (TGA). The TGA outlined the char combustion thermographs at a different heating rate and isoconversional methods expressed the combustion kinetics. The Kissinger–Akahira–Sunose (KAS) and Flynn–Wall–Ozawa (FWO) methods authenticated the char average activation energy at 62.13 and 68.53 kJ/mol respectively, enough to derive the char to burnout. However, the Coats–Redfern method verified the char combustion via complex multi-step mechanism; the second stage mechanism has 135 kJ/mol average activation energy. The TGA thermographs and kinetic parameters revealed the adequacy of the KFH-char as fuel substrate than its precursor, Karanj fruit hulls (KFH).