Chlorination Kinetics of Synthetic Rutile with Cl2+CO Gas

Sung-Min Hong; So-Yeong Lee; Ho-Sang Sohn

doi:10.7844/kirr.2020.29.3.3

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2020 Vol.29, Issue 3 Next Page

Research Paper

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

30 June 2020. pp. 3-10

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Abstract

The chlorination kinetics of synthetic rutile prepared by selective chlorination of ilmenite with Cl₂ and CO gas mixture were studied in a fluidized bed. The effects of reaction temperature, reaction time, and the ratio of Cl₂ and CO partial pressure (pCl2/pCO) on the conversion rate of TiCl₄ were investigated. The conversion rate of TiCl₄ was low under the high pCl2/pCO 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.

Keywords

합성루타일

다공성

염화반응

사염화타이타늄

화학반응율속

활성화에너지

일메나이트의 선택염화를 통해 제조한 합성루타일을 유동층에서 CO와 Cl₂ 혼합가스를 이용하여 염화시켜 TiO₂의 염화반응 속도에 미치는 반응 온도, 시간, CO가스와 Cl₂가스의 분압 비(pCl2/pCO)의 영향에 대하여 조사하였다. pCl2/pCO가 높을 때 TiCl₄의 전환율은 감소하였으며, 화학양론 계산결과와 실험결과를 비교하였을 때 Cl₂가스 보다 CO가스의 분압이 더 큰 영향을 미친 것으로 판단되었다. 따라서 실험 결과를 입자의 기공을 고려한 모델에 대입하였을 때 합성 루타일의 염화반응은 화학반응율속으로 결정되었고, 활성화에너지는 53.77 kJ/mol로 계산되었다.

키워드

synthetic rutile

porous

chlorination

titanium tetra chloride

chemical reaction

activation energy

References

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Information

Publisher :The Korean Institute of Resources Recycling
Publisher(Ko) :한국자원리싸이클링학회
Journal Title :Journal of the Korean Institute of Resources Recycling
Journal Title(Ko) :자원리싸이클링
Volume : 29
No :3
Pages :3-10
Received Date : 2020-03-25
Revised Date : 2020-05-25
Accepted Date : 2020-06-02
DOI :https://doi.org/10.7844/kirr.2020.29.3.3

Resources Recycling ISSN:2765-3439(Print) 2765-3447(Online) 자원리싸이클링

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