The non-isothermal kinetics analysis of the thermal decomposition of kaolinite by Effluent Gas Analysis technique

✍ Scribed by Petr Ptáček; František Šoukal; Tomáš Opravil; Magdaléna Nosková; Jaromír Havlica; Jiří Brandštetr

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 565 KB
• Volume: 203
• Category: Article
• ISSN: 0032-5910
• DOI: 10.1016/j.powtec.2010.05.018

✦ Synopsis

The thermal decomposition of kaolin with high-content of the medium ordered kaolinite was studied by Effluent Gas Analysis (EGA) under non-isothermal conditions. This technique enables to distinguish two overlaying processes during the thermal decomposition of kaolin: oxidation of organic compounds and dehydroxylation. The kinetic of non-isothermal dehydroxylation of kaolinite is controlled by the rate of the third-order reaction. For the given reaction mechanism, the overall activation energy (E A ) and preexponential (frequency) factor (A) values are 242 kJ mol -1 and 2.21 × 10 8 s -1 , respectively.