Mechanisms and kinetics for preparation of anhydrous magnesium chloride by complex thermal decomposition method

作者：Wu Yu Long; Huang Xiao Fang; Yang Ming De^*; Hu Hu Sheng; Zhang Jian An

来源：Chinese Journal of Inorganic Chemistry, 2007, 23(1): 149-154.

• anilinechloride
• bischofite thermal decomposition mechanism
• kinetics
• anhydrous magnesium chloride

The complex compound (MgCl2 center dot C6H5NH2 center dot HCl center dot 6H(2)O) was prepared by reaction of C6H5NH2 center dot HCl with MgCl2 center dot 6H(2)O. Reaction mechanism and kinetics of the compounds decomposition were studied by means of the TG-DTA-MS coupling technique and the TG-DTA technique. The results show that there are four steps in the complex's thermal decomposition, the first two steps correspond to the loss of six crystal waters and the last two steps loss one Aniline hydrochloride. The first three steps belong to the R2 mechanism with 2-dimentional phase boundary reaction as the control step, and the last step belongs to the D3 with 3-dimensional diffusion (sphere Jander equ.) as; the control step. The apparent active energy of four steps are, 127.4 kJ center dot mol(-1), 124.8 kJ center dot mol(-1), 142.3 kJ center dot mol(-1) and 329.0 kJ center dot mol(-1), respectively and the frequency factor are 1.28 x 10(18) s(-1), 7.94 x 10(15) s(-1), 5.98 x 10(16) s(-1) and 4.39 x 10(34) s(-1), respectively.

• 出版日期2007-1
• 单位清华大学