Effect of Er(NO3)3 content on the thermal decomposition kinetics of kaolinite
作者： Weiquan Yuan , Jingzhong Kuang , Pengfei Liu
DOI: 10.1016/J.CLAY.2019.105271
关键词:
摘要: Abstract This study investigated the thermal decomposition process of kaolinite mixed with different Er(NO3)3 contents by means a comprehensive analysis (TG-DTG). HTXRD, SEM-EDS, TEM, AFM and 27Al MAS NMR analyses were used; activation energy, controlling mechanism function pre-exponential factor kinetics for obtained through Coats-Redfern integral Achar differential methods; Ozawa method was used to verify energy. The results showed that as content increased, transformed from chemical reaction model F3 F2, whereas energy factors decreased rapidly before stabilizing. corresponding temperature at maximum rate significantly increased higher heating rates (≥25 °C·min−1), promoting kaolinite. spectra indicated increasing accelerated transformation A1VI AlV part in sample first converted ErONO3 then dispersed evenly Er2O3 nanoparticles.
sci-hub.se 参考文章(42)
H. Rahier, B. Wullaert, B. Van Mele, Influence of the degree of dehydroxylation of kaolinite on the properties of aluminosilicate glasses Journal of Thermal Analysis and Calorimetry. ,vol. 62, pp. 417- 427 ,(2000) , 10.1023/A:1010138130395
Shenghui Zhang, Xuemei Ou, Yinghuai Qiang, Jinan Niu, Sridhar Komarneni, Thermal decomposition behavior and de-intercalation mechanism of acetamide intercalated into kaolinite by thermoanalytical techniques Applied Clay Science. ,vol. 114, pp. 309- 314 ,(2015) , 10.1016/J.CLAY.2015.06.002
李琳, 匡敬忠, 原伟泉, 黄震, 徐力勇, La(NO3)3和Pr(NO3)3对高岭石脱羟基动力学的影响 Chemical Journal of Chinese Universities-chinese. ,vol. 36, pp. 1395- 1402 ,(2015) , 10.7503/CJCU20141004
Petr Ptáček, František Šoukal, Tomáš Opravil, Jaromír Havlica, Jiří Brandštetr, The kinetic analysis of the thermal decomposition of kaolinite by DTG technique Powder Technology. ,vol. 208, pp. 20- 25 ,(2011) , 10.1016/J.POWTEC.2010.11.035
Petr Ptáček, Tomáš Opravil, František Šoukal, Jaromír Wasserbauer, Jiří Másilko, Jan Baráček, The influence of structure order on the kinetics of dehydroxylation of kaolinite Journal of The European Ceramic Society. ,vol. 33, pp. 2793- 2799 ,(2013) , 10.1016/J.JEURCERAMSOC.2013.04.033
Petr Ptáček, Dana Kubátová, Jaromír Havlica, Jiří Brandštetr, František Šoukal, Tomáš Opravil, Isothermal kinetic analysis of the thermal decomposition of kaolinite: The thermogravimetric study Thermochimica Acta. ,vol. 501, pp. 24- 29 ,(2010) , 10.1016/J.TCA.2009.12.018
Takeo Ozawa, A New Method of Analyzing Thermogravimetric Data Bulletin of the Chemical Society of Japan. ,vol. 38, pp. 1881- 1886 ,(1965) , 10.1246/BCSJ.38.1881
Ray L. Frost, Erzsébet Horváth, Éva Makó, János Kristóf, Ákos Rédey, Slow transformation of mechanically dehydroxylated kaolinite to kaolinite—an aged mechanochemically activated formamide-intercalated kaolinite study Thermochimica Acta. ,vol. 408, pp. 103- 113 ,(2003) , 10.1016/S0040-6031(03)00316-2
John S. Killingley, Stuart J. Day, Dehydroxylation kinetics of kaolinite and montmorillonite from Queensland Tertiary oil shale deposits Fuel. ,vol. 69, pp. 1145- 1149 ,(1990) , 10.1016/0016-2361(90)90072-X
O. Castelein, B. Soulestin, J.P. Bonnet, P. Blanchart, The influence of heating rate on the thermal behaviour and mullite formation from a kaolin raw material Ceramics International. ,vol. 27, pp. 517- 522 ,(2001) , 10.1016/S0272-8842(00)00110-3