Citation: ZHOU Ya-Chong, ZHANG Sheng-Hui, OU Xue-Mei, ZHANG Xiao-Bin, ZHANG Xin. Thermal Decomposition Behavior and Deintercalation Kinetics of Kaolinite/ Benzamide Intercalation Complex[J]. Chinese Journal of Inorganic Chemistry, ;2013, 29(5): 985-990. doi: 10.3969/j.issn.1001-4861.2013.00.112 shu

Thermal Decomposition Behavior and Deintercalation Kinetics of Kaolinite/ Benzamide Intercalation Complex

1.
School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China

Corresponding author: OU Xue-Mei,
Received Date: 31 October 2012
Available Online: 29 November 2012
Fund Project: 中国矿业大学中央高校基本科研业务费专项资金(2012LWA02) 资助项目。 (2012LWA02)

The kaolinite/benzamide was prepared with a direct displacement intercalation method by using kaolinite/DMSO intercalation complex as an intermediate. The XRD and FTIR results show that benzamide has inserted into kaolinite and formed new hydrogen bonds with the inner surface of kaolinite. The thermal decomposition behavior of the complex was studied by TG and DSC. The TG and DSC results indicate that the decomposition process of the complex proceeds in two steps. The first step is deintercalation of the intercalated benzamide at 231 ℃ and the second step is dehydroxylation of kaolinite. For the first step, the kinetic triplet of the complex was calculated by the Modified Iterative Iso-conversional Procedure,Malek and Dollimore methods. The activation energy Ea is 75.4 kJ·mol^-1, the range of pre-exponential factor A is 4.9×10¹⁰～8.8×10¹⁰ s^-1. The optimized mechanism function is nth-order chemical reaction,the mechanism function is G(α)=[1-(1-α)^1-n]/(1-n), f(α)=(1-α)ⁿ.
- kaolinite;benzamide;intercalation;thermal decomposition;kinetic
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