EXPERIMENTAL STUDY AND MODEL DEVELOPMENT ON THE MOISTURE EFFECT FOR NUCLEAR GRAPHITE OXIDATION
作者： Eung Soo Kim , Chang Ho Oh , Hee Cheon No
DOI: 10.13182/NT08-A4026
关键词: Moisture 、 Porous medium 、 Nuclear graphite 、 Chemistry 、 Nuclear chemistry 、 Analytical chemistry 、 Humidity 、 Combustion 、 Mass transfer 、 Relative humidity 、 Mole fraction
摘要: A number of experiments was carried out to investigate the effect moisture, always present in environmental air, on graphite oxidation rate. porous metal with 10 µ m pores used enhance humidification at outlet vertical column that is full water and designed increase moisture helium gas when it passed through media located bottom column. The relative humidity mixture controlled between 0 % 70 by a sensor. experiment performed temperatures ranging from 873K 1573 K, mole fractions oxygen 0.09 0.17, normal condition. Assuming only affects mass transfer, we derived theoretical model for transfer included fast homogeneous CO combustion reaction. showed rate humid air half dry air. predictions agree experimental data within 17%.
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ans.org 参考文章(8)
E Loren Fuller, Joseph M Okoh, Kinetics and mechanisms of the reaction of air with nuclear grade graphites: IG-110 Journal of Nuclear Materials. ,vol. 240, pp. 241- 250 ,(1997) , 10.1016/S0022-3115(96)00462-X
Eung Soo Kim, Hee Cheon NO, Experimental study on the oxidation of nuclear graphite and development of an oxidation model Journal of Nuclear Materials. ,vol. 349, pp. 182- 194 ,(2006) , 10.1016/J.JNUCMAT.2005.10.015
Minoru TAKAHASHI, Masahiro KOTAKA, Hiroshi SEKIMOTO, Burn-off and Production of CO and CO2 in the Oxidation of Nuclear Reactor-Grade Graphites in a Flow System Journal of Nuclear Science and Technology. ,vol. 31, pp. 1275- 1286 ,(1994) , 10.1080/18811248.1994.9735290
Eung Soo Kim, Hee Cheon No, Experimental study on the reaction between nuclear graphite IG-110 and carbon dioxide Journal of Nuclear Materials. ,vol. 350, pp. 96- 100 ,(2006) , 10.1016/J.JNUCMAT.2005.11.015
Eung Soo Kim, Kyung Won Lee, Hee Cheon No, Analysis of geometrical effects on graphite oxidation through measurement of internal surface area Journal of Nuclear Materials. ,vol. 348, pp. 174- 180 ,(2006) , 10.1016/J.JNUCMAT.2005.09.018
Haruo Kawakami, Air Oxidation Behavior of Carbon and Graphite Materials for HTGR Carbon. ,vol. 1986, pp. 26- 33 ,(1986) , 10.7209/TANSO.1986.26
J. H. Whitelaw, W. M. Kays, Convective heat and mass transfer ,(1966)
Masuro OGAWA, Mass Transfer with Graphite Oxidation in Gas Mixture Laminar Flow through Circular Tube. Journal of the Atomic Energy Society of Japan. ,vol. 35, pp. 245- 252 ,(1993) , 10.3327/JAESJ.35.245