<sup>18</sup>O Exchange between Solid Iron Oxide and CO<sub>2</sub>-CO Gas Using Mass Spectrometry

YAN Hong-yan; HU Xiao-jun; ZHOU Guo-zhi

doi:10.7538/zpxb.youxian.2014.0064

Journal of Chinese Mass Spectrometry Society > 2015 > 36(1): 85-90. > DOI: 10.7538/zpxb.youxian.2014.0064 CSTR: 32365.14.zpxb.youxian.2014.0064

YAN Hong-yan, HU Xiao-jun, ZHOU Guo-zhi. ¹⁸O Exchange between Solid Iron Oxide and CO₂-CO Gas Using Mass Spectrometry[J]. Journal of Chinese Mass Spectrometry Society, 2015, 36(1): 85-90. DOI: 10.7538/zpxb.youxian.2014.0064

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¹⁸O Exchange between Solid Iron Oxide and CO₂-CO Gas Using Mass Spectrometry

State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China

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In order to cliarify the kinetics of oxygen transfer in metallurgical gas-solid reactions, the oxygen isotope exchange technique was used to study the oxygen exchange reaction between CO₂-CO gas containing ¹⁸O and iron oxide at 1373 K. The influence of oxygen partial pressure on oxygen exchange reaction was investigated. The results show that the rates sharply decrease approximately 100 s, and then gradually decrease with the reaction time proceeded. The rate-limiting step changes from interfacial chemical reaction in the initial stage to mass transfer in the following stage. Higher oxygen potential in mixture gas accelerates the oxygen exchange reaction.
- oxygen isotope exchange method,
- iron oxide,
- CO₂ dissociation,
- oxygen exchange rate

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18O Exchange between Solid Iron Oxide and CO2-CO Gas Using Mass Spectrometry

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¹⁸O Exchange between Solid Iron Oxide and CO₂-CO Gas Using Mass Spectrometry