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Non-isothermal kinetic analysis of thermal dehydration of La2(CO3)3·3.4H2O in air
| Content Provider | Semantic Scholar |
|---|---|
| Author | Zhang, Xiang-Hui He, Chuan Wang, Ling Liu, Jing Deng, M. T. Feng, Qian |
| Copyright Year | 2014 |
| Abstract | Abstract The single phase La 2 (CO 3 ) 3 ·3.4H 2 O was synthesized by hydrothermal method. The thermal decomposition and intermediates and final solid products of La 2 (CO 3 ) 3 ·3.4H 2 O from 30 to 1000 °C were characterized by XRD, FTIR and DTA–TG. The kinetics of dehydration of La 2 (CO 3 ) 3 ·3.4H 2 O in the temperature range of 30–366 °C was investigated under non-isothermal conditions. Flynn–Wall–Ozawa and Friedman isoconversion methods were used to calculate the activation energy and analyze the reaction steps; multivariate non-linear regression program was applied to determine the most probable mechanism and the kinetic parameters. The results show that the thermal dehydration of La 2 (CO 3 ) 3 ·3.4H 2 O is a kind of three-step competitive reaction, and controlled by an n -order initial reaction followed by n -order competitive reaction ( F n F n F n model). The activation energy matching with the most probable model is close to value obtained by Friedman method. The fitting curves match the original TG–DTG curves very well. |
| Starting Page | 3378 |
| Ending Page | 3385 |
| Page Count | 8 |
| File Format | PDF HTM / HTML |
| DOI | 10.1016/S1003-6326(14)63480-4 |
| Volume Number | 24 |
| Alternate Webpage(s) | http://www.ysxbcn.com/down/2014/10_en/40-p3378.pdf |
| Alternate Webpage(s) | https://doi.org/10.1016/S1003-6326%2814%2963480-4 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
