CAJ | 학술논문

以焦炭作还原剂，利用天然金红石和氯气制备四氯化钛。在1173到1273 K的温度范围内，对肯尼亚天然金红石颗粒在间歇式流化床中的氯化反应热力学和动力学进行研究。体系的热力学分析显示：生成CO的反应在高温下占主导地位；若生成CO反应的比率η越大，且随着体系反应受温度的影响加剧，高温下反应的吉布斯自由能越负；同时，η增大，产物中TiCl4分压对反应的吉布斯自由能的影响趋于减小。应用气-固多相反应理论和流化床两相模型建立反应的数学模型，计算了气泡相和乳相中模型的各种参数，床层高度范围内氯气的平均浓度为0.3 mol/m3。结果表明：天然金红石氯化反应主要在乳相中进行，反应速率主要由界面反应控制。
이초탄작환원제，이용천연금홍석화록기제비사록화태。재1173도1273 K적온도범위내，대긍니아천연금홍석과립재간헐식류화상중적록화반응열역학화동역학진행연구。체계적열역학분석현시：생성CO적반응재고온하점주도지위；약생성CO반응적비솔η월대，차수착체계반응수온도적영향가극，고온하반응적길포사자유능월부；동시，η증대，산물중TiCl4분압대반응적길포사자유능적영향추우감소。응용기-고다상반응이론화류화상량상모형건립반응적수학모형，계산료기포상화유상중모형적각충삼수，상층고도범위내록기적평균농도위0.3 mol/m3。결과표명：천연금홍석록화반응주요재유상중진행，반응속솔주요유계면반응공제。
Natural rutile and gaseous chlorine with carbon as reductant were used to prepare titanium tetrachloride. Thermodynamics and kinetics of chlorination of Kenya natural rutile particles in a batch-type fluidized bed were studied at 1173-1273 K. Thermodynamic analysis of this system revealed that the equation of producing CO was dominant at high temperatures. Based on the gas-solid multi-phase reaction theory and a two-phase model for the fluidized bed, the mathematical description for the chlorination reaction of rutile was proposed. The reaction parameters and the average concentration of gaseous chlorine in the emulsion phase were estimated. The average concentration of emulsion phase in the range of fluidized bed was calculated as 0.3 mol/m3. The results showed that the chlorination of natural rutile proceeded principally in the emulsion phase, and the reaction rate was mainly controlled by the surface reaction.