Characterization and kinetics analysis of the thermal decomposition of the humic substance from hazelnut husk

Authors : Fatma KARA, Duygu ADİGUZEL, Ufuk ATMACA, Murat CELİK, Jale NAKTİYOK

Pages : 1483-1494

View : 14 | Download : 4

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :A humic substance was obtained from hazelnut husk using an alkali extraction. The chemical and morphological structure of the humic matter was characterized via elemental analysis, Fourier transform infrared spectrometry insert ignore into journalissuearticles values(FTIR);, nuclear magnetic resonance, Brunatier-Emmet-Teller insert ignore into journalissuearticles values(BET); analysis, scanning electron microscopy insert ignore into journalissuearticles values(SEM);, and thermogravimetric-FTIR insert ignore into journalissuearticles values(TG-FTIR);. In addition, thermal analysis measurements TG analysis-differential thermogravimetry/differential scanning calorimetry insert ignore into journalissuearticles values(TGA-DTG/ DSC); were performed under dynamic air conditions to better determine the origin, physical and chemical structure, and decomposition process of the humic matter. The Kissinger-Akahira-Sunose insert ignore into journalissuearticles values(KAS); and Flynn-Wall-Ozawa insert ignore into journalissuearticles values(FWO); methods were used to calculate the kinetic parameters of the high-temperature decomposition process. It was observed that the activation energy values were almost constant at certain conversion and temperature intervals. In addition, the structure of the humic substance at different temperatures was also investigated via FTIR analysis. It was found that the obtained humic substance had a very stable structure and decomposed at a high temperature. The stability of the humic matter can be a useful tool in the environmental quality research of soil.
Keywords : Hazelnut husk, humic substance, thermal decomposition, TG DTG DSC analysis, kinetic analysis