<p>The reaction process in the titanium dichloride and magnesium system was systematically investigated by dynamic differential scanning calorimetry. The actual temperature conditions and reaction stages were determined. The reaction proceeds through multiple stages and is governed by both chemical and diffusion control. In the early stage, chemical reaction kinetics dominate; as the reaction proceeds, the formation of the Ti product can act as an autocatalyst, and the interaction between magnesium chloride and titanium chlorides accelerates the reaction. In the later stage, the thickening of the product layer hinders contact between the reactants, causing the diffusion control effect to gradually strengthen and become the key factor influencing the reaction rate. The Málek method was employed for kinetic model selection, and the results show that the Sestak-Berggren model provides a good fit to the experimental data. From this, the corresponding kinetic parameters were obtained, and the kinetic equation <InlineEquation ID="IEq1"> <EquationSource Format="TEX">$\frac{{{\text{d}}\alpha }}{{{\text{d}}t}} = 7.344 \times 1019{\text{e}}^{{ - 40426/T}} \alpha ^{{0.322}} (1 - \alpha )^{{0.922}}$</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mfrac> <mrow> <mtext>d</mtext> <mi>α</mi> </mrow> <mrow> <mtext>d</mtext> <mi>t</mi> </mrow> </mfrac> <mo>=</mo> <mn>7.344</mn> <mo>×</mo> <mn>1019</mn> <msup> <mrow> <mtext>e</mtext> </mrow> <mrow> <mo>-</mo> <mn>40426</mn> <mo stretchy="false">/</mo> <mi>T</mi> </mrow> </msup> <msup> <mi>α</mi> <mrow> <mn>0.322</mn> </mrow> </msup> <msup> <mrow> <mo stretchy="false">(</mo> <mn>1</mn> <mo>-</mo> <mi>α</mi> <mo stretchy="false">)</mo> </mrow> <mrow> <mn>0.922</mn> </mrow> </msup> </mrow> </math></EquationSource> </InlineEquation> was established.</p>

Kinetics of the reaction between titanium dichloride and magnesium

期刊论文
发表日期：

2026年6月23日

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Shiqing Tian,
Jun Li,
Kaihua Li,
Xin Tian,
Jiangqi Zhao,
Jinsong Liu,
Jiazhen Qiu,
Xin Yang,
Ying Liu

摘要

The reaction process in the titanium dichloride and magnesium system was systematically investigated by dynamic differential scanning calorimetry. The actual temperature conditions and reaction stages were determined. The reaction proceeds through multiple stages and is governed by both chemical and diffusion control. In the early stage, chemical reaction kinetics dominate; as the reaction proceeds, the formation of the Ti product can act as an autocatalyst, and the interaction between magnesium chloride and titanium chlorides accelerates the reaction. In the later stage, the thickening of the product layer hinders contact between the reactants, causing the diffusion control effect to gradually strengthen and become the key factor influencing the reaction rate. The Málek method was employed for kinetic model selection, and the results show that the Sestak-Berggren model provides a good fit to the experimental data. From this, the corresponding kinetic parameters were obtained, and the kinetic equation $\frac{{{\text{d}}\alpha }}{{{\text{d}}t}} = 7.344 \times 1019{\text{e}}^{{ - 40426/T}} \alpha ^{{0.322}} (1 - \alpha )^{{0.922}}$ $\frac{d α}{d t} = 7.344 \times 1019 e^{- 40426 / T} α^{0.322} {(1 - α)}^{0.922}$ was established.