scholarly journals Mechanisms and Kinetics of Reduction of Solid NiO in CO/CO2 and CO/Ar Gas Mixtures

2019 ◽  
Vol 50 (6) ◽  
pp. 2623-2635
Author(s):  
Jiang Chen ◽  
Peter C. Hayes
Keyword(s):  
Gas Mixtures ◽  
Ar Gas ◽  
Kinetics Of ◽  
Kinetics Of Reduction

scholarly journals Reduction Extraction Kinetics of Titania and Iron from an Ilmenite by H2–Ar Gas Mixtures

2009 ◽  
Vol 49 (2) ◽  
pp. 164-170 ◽  
Author(s):  
Yuming Wang ◽  
Zhangfu Yuan ◽  
Hiroyuki Matsuura ◽  
Fumitaka Tsukihashi
Keyword(s):  
Gas Mixtures ◽  
Extraction Kinetics ◽  
Ar Gas ◽  
Kinetics Of

Kinetics of deposition of zirconia-based ceramics from ZrCl4H2CO2Ar gas mixtures

1992 ◽  
Vol 186 (1) ◽  
pp. 65-75 ◽  
Author(s):  
Etienne Sipp ◽  
Francis Langlais ◽  
Roger Naslain
Keyword(s):  
Gas Mixtures ◽  
Ar Gas ◽  
Kinetics Of

ChemInform Abstract: Kinetics of Deposition of Zirconia-Based Ceramics from ZrCl4-H2-CO2-Ar Gas Mixtures.

ChemInform ◽  
2010 ◽  
Vol 23 (40) ◽  
pp. no-no
Author(s):  
E. SIPP ◽  
F. LANGLAIS ◽  
R. NASLAIN
Keyword(s):  
Gas Mixtures ◽  
Ar Gas ◽  
Kinetics Of

Kinetics of Reduction of Titano-magnetite Powder by H2

2013 ◽  
Vol 32 (3) ◽  
pp. 229-236 ◽  
Author(s):  
Jie Dang ◽  
Xiaojun Hu ◽  
Guohua Zhang ◽  
Xinmei Hou ◽  
Xiaobo Yang ◽  
...  
Keyword(s):  
Product Layer ◽  
X Ray Diffraction ◽  
Gaseous Species ◽  
Thermo Gravimetric Analyzer ◽  
Interfacial Chemical Reaction ◽  
Apparent Activation Energies ◽  
Ar Gas ◽  
Kinetics Of ◽  
Rate Controlling Step ◽  
Kinetics Of Reduction

AbstractReduction of titano-magnetite powder containing 56.9 mass% of iron and 9.01 mass% of TiO2 with H2-Ar gas mixtures was investigated in isothermal experiments using thermo-gravimetric analyzer (TGA), X-ray diffraction (XRD) and scanning electron microscopy (SEM). The reduction of titano-magnetite was proved to proceed via a dual reactions mechanism. The first reaction is reduction of titano-magnetite to wüstite and ilmenite and the second one is reduction of wüstite and ilmenite to iron and titanium-containing phase. It was found that the dual reactions occurred simultaneously during the reduction. The reduction kinetics of titano-magnetite was analyzed according to a dual reactions kinetic model and the results indicated that the gaseous species diffusion in product layer was the rate controlling step for the first reaction, and interfacial chemical reaction was that for the second reaction. The apparent activation energies were extracted to be 98 kJ/mol and 115 kJ/mol for the first and second reaction, respectively.

Sign in / Sign up

Export Citation Format

Share Document