• Title/Summary/Keyword: 사염화타이타늄

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Synthesis of Titanium Hydride Powder Via Magnesiothermic Reduction of TiCl4 in H2 gas Atmosphere (수소분위기 내 사염화타이타늄의 마그네슘 열환원을 이용한 수소화타이타늄 분말 합성)

  • Sung-Hun Park;So-Yeong Lee;Ho-Seong Lee;Jungshin Kang;Ho-Sang Sohn
    • Resources Recycling
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    • v.32 no.2
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    • pp.19-32
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    • 2023
  • A novel method for the synthesis of titanium hydride powder from titanium tetrachloride via the magnesiothermic reduction in an hydrogen gas atmosphere was investigated. To examine the influence of temperature on the formation of titanium hydride, the reduction was conducted at 1023~1123 K under 1 atm of hydrogen gas atmosphere for approximately 30 min. Subsequently, the titanium hydride powder was sintered by maintaining the temperature for 0~120 min, and the decrease in the oxygen concentration of the powder was investigated. The experimental results showed that TiH1.924 was produced at 1023 K, whereas mixtures of TiH1.924 and TiH1.5 were produced at 1073 K and 1123 K. In addition, the hydrogen concentration in the powder decreased with increasing temperature. The concentration of oxygen in the powder decreased with increasing temperature and sintering time owing to the decrease in the specific surface area of the powder. The minimum concentration of oxygen was 0.246 mass% when the mixture of TiH1.924 and TiH1.5 was obtained at 1073 K and a sintering time of 120 min.

Chlorination Kinetics of Synthetic Rutile with Cl2+CO Gas (Cl2+CO 혼합가스에 의한 합성루타일 염화반응의 속도론적 연구)

  • Hong, Sung-Min;Lee, So-Yeong;Sohn, Ho-Sang
    • Resources Recycling
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    • v.29 no.3
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    • pp.3-10
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    • 2020
  • The chlorination kinetics of synthetic rutile prepared by selective chlorination of ilmenite with Cl2 and CO gas mixture were studied in a fluidized bed. Th e effects of reaction temperature, reaction time, and the ratio of Cl2 and CO partial pressure ($p_{Cl_2}/p_{CO}$) on the conversion rate of TiCl4 were investigated. The conversion rate of TiC4 was low under the high $p_{Cl_2}/p_{CO}$ conditions. Moreover, it was considered that the partial pressure of CO gas was more effective than that of Cl2 gas when comparing the stoichiometric conversion rate and experimental results of high CO partial pressure. Considering the porous structure of particles, the rate controlling step of the chlorination of synthetic rutile was determined to be chemical reaction and the activation energy was calculated as 53.77 kJ/mol.