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Study on the Thermochemical and Kinetic Characteristics of Alkali Treated Rice Husk
Author(s) -
Markovska I. G.,
Bogdanov B.,
Nedelchev N. M.,
Gurova K. M.,
Zagorcheva M. H.,
Lyubchev L. A.
Publication year - 2010
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.201000061
Subject(s) - husk , chemistry , scanning electron microscope , raw material , thermal analysis , isothermal process , alkali metal , nitrogen , kinetic energy , kinetics , thermal , extraction (chemistry) , chemical engineering , degradation (telecommunications) , thermodynamics , organic chemistry , composite material , materials science , engineering , biology , telecommunications , computer science , botany , physics , quantum mechanics
The effective utilization of waste rice husk requires detailed studies on the kinetics and mechanism of their thermal and chemical treatment. The present work is a comparative study on the thermo‐chemical and kinetic characteristics of thermal degradation of raw and treated with NaOH rice husk. The optimal conditions for extraction of SiO 2 from rice husk in the form of Na 2 SiO 3 were determined using thermal analysis (TA), scanning electron microscope (SEM) and elemental analysis. The experiments were carried out under conditions of non‐isothermal heating in air and nitrogen atmosphere. Using different kinetic models, the values of the effective kinetic parameters, characterizing the destruction process were determined.