Effect of the Formation of CNTs on the Reduction of Ilmenite

The reduction process of ilmenite by hydrogen and methane under MPCVD was analyzed by XRD result. The reduction degree of ilmenite increased with adding methane, the case similar to reduction rate. The mechanism of reduction process changed with the increasement of methane flow because of the format...

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Published inJournal of Wuhan University of Technology. Materials science edition Vol. 27; no. 5; pp. 948 - 951
Main Authors Wang, Shenggao, Zhang, Wenbo, Xu, Kaiwei, Wang, Mingyang, Wang, Jianhua, Han, Jianjun, Zhao, Xiujian, Xu, Weiguo
Format Journal Article
LanguageEnglish
Published Heidelberg Wuhan University of Technology 01.10.2012
Springer Nature B.V
Subjects
Carbon nanotubes
Chemistry and Materials Science
Diffusion
Diffusion rate
Fracture mechanics
Ilmenite
Materials Science
Methane
Reduction
SEM观察
X射线衍射
微波等离子体化学气相沉积
碳纳米管
管形
还原过程
速率控制
钛铁矿
ilmenite
carbon nanotube
microwave plasma
reduction
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Summary:The reduction process of ilmenite by hydrogen and methane under MPCVD was analyzed by XRD result. The reduction degree of ilmenite increased with adding methane, the case similar to reduction rate. The mechanism of reduction process changed with the increasement of methane flow because of the formation of carbon nanotubes （CNTs）. The morphology of reduced samples was observed by SEM, and it was found that CNTs played an important role in the fracture of ilmenite particles. The reduction kinetics showed that the reduction was rate-controlling for hydrogen, and diffusion-controlling when hydrogen mixed with high flow methane.
Bibliography:42-1680/TB
ilmenite microwave plasma carbon nanotube reduction
The reduction process of ilmenite by hydrogen and methane under MPCVD was analyzed by XRD result. The reduction degree of ilmenite increased with adding methane, the case similar to reduction rate. The mechanism of reduction process changed with the increasement of methane flow because of the formation of carbon nanotubes （CNTs）. The morphology of reduced samples was observed by SEM, and it was found that CNTs played an important role in the fracture of ilmenite particles. The reduction kinetics showed that the reduction was rate-controlling for hydrogen, and diffusion-controlling when hydrogen mixed with high flow methane.
WANG Shenggao1, ZHANG Wenbo1, XU Kaiwei1, WANG Mingyang1, WANG Jianhua1, HAN Jianjun2, ZHAO Xiujian2, XU Weiguo3＊ （1. Provincial Key Laboratory of Plasma Chemistry and Advanced Materials, Wuhan Institute of Technology, Wuhan 430073, China; 2. State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China; 3. Department of Orthopaedics, Tongji Hospital Affiliated to Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China）
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1000-2413
1993-0437
DOI:10.1007/s11595-012-0579-z