Comparison of NBG-18, NBG-17, IG-110 and IG-11 oxidation kinetics in air

Lee, Jo Jo; Ghosh, Tushar K.; Loyalka, Sudarshan K.

doi:10.1016/j.jnucmat.2017.11.053

Comparison of NBG-18, NBG-17, IG-110 and IG-11 oxidation kinetics in air

Journal Article · Thu Dec 14 00:00:00 EST 2017 · Journal of Nuclear Materials

DOI:https://doi.org/10.1016/j.jnucmat.2017.11.053· OSTI ID:1423049

^[1]; Ghosh, Tushar K. ^[2]; Loyalka, Sudarshan K. ^[2]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Univ. of Missouri, Columbia, MO (United States)

In this paper, the oxidation rates of several nuclear-grade graphites, NBG-18, NBG-17, IG-110 and IG-11, were measured in air using thermogravimetry. Kinetic parameters and oxidation behavior for each grade were compared by coke type, filler grain size and microstructure. The thickness of the oxidized layer for each grade was determined by layer peeling and direct density measurements. The results for NBG-17 and IG-11 were compared with those available in the literature and our recently reported results for NBG-18 and IG-110 oxidation in air. The finer-grained graphites IG-110 and IG-11 were more oxidized than medium-grained NBG-18 and NBG-17 because of deeper oxidant penetration, higher porosity and higher probability of available active sites. Variation in experimental conditions also had a marked effect on the reported kinetic parameters by several studies. Finally, kinetic parameters such as activation energy and transition temperature were sensitive to air flow rates as well as sample size and geometry.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Missouri, Columbia, MO (United States)

Sponsoring Organization:: Dept. of Education (United States); USDOE; USDOE Office of Nuclear Energy (NE)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1423049

Alternate ID(s):: OSTI ID: 1548966

Journal Information:: Journal of Nuclear Materials, Journal Name: Journal of Nuclear Materials Vol. 500; ISSN 0022-3115

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

References (23)

Kinetics and mechanisms of the reaction of air with nuclear grade graphites: IG-110 Loren Fuller, E.; Okoh, Joseph M. Journal of Nuclear Materials, Vol. 240, Issue 3 https://doi.org/10.1016/S0022-3115(96)00462-X	journal	February 1997
The effect of microstructure on air oxidation resistance of nuclear graphite Contescu, Cristian I.; Guldan, Tyler; Wang, Peng Carbon, Vol. 50, Issue 9 https://doi.org/10.1016/j.carbon.2012.01.040	journal	August 2012
Analysis of geometrical effects on graphite oxidation through measurement of internal surface area Kim, Eung Soo; Lee, Kyung Won; No, Hee Cheon Journal of Nuclear Materials, Vol. 348, Issue 1-2 https://doi.org/10.1016/j.jnucmat.2005.09.018	journal	January 2006
Experimental study on the oxidation of nuclear graphite and development of an oxidation model Kim, Eung Soo; No, Hee Cheon Journal of Nuclear Materials, Vol. 349, Issue 1-2 https://doi.org/10.1016/j.jnucmat.2005.10.015	journal	February 2006
Change of properties after oxidation of IG-11 graphite by air and CO2 gas Lim, Yun-Soo; Chi, Se-Hwan; Cho, Kwang-Yun Journal of Nuclear Materials, Vol. 374, Issue 1-2 https://doi.org/10.1016/j.jnucmat.2007.07.015	journal	February 2008
Practical aspects for characterizing air oxidation of graphite Contescu, Cristian I.; Azad, Samina; Miller, Doug Journal of Nuclear Materials, Vol. 381, Issue 1-2 https://doi.org/10.1016/j.jnucmat.2008.07.020	journal	October 2008
Comparison of the oxidation rate and degree of graphitization of selected IG and NBG nuclear graphite grades Chi, Se-Hwan; Kim, Gen-Chan Journal of Nuclear Materials, Vol. 381, Issue 1-2 https://doi.org/10.1016/j.jnucmat.2008.07.027	journal	October 2008
Penetration depth and transient oxidation of graphite by oxygen and water vapor Wichner, Robert P.; Burchell, Timothy D.; Contescu, Cristian I. Journal of Nuclear Materials, Vol. 393, Issue 3 https://doi.org/10.1016/j.jnucmat.2009.06.032	journal	September 2009
Development and validation of a model for the chemical kinetics of graphite oxidation El-Genk, Mohamed S.; Tournier, Jean-Michel P. Journal of Nuclear Materials, Vol. 411, Issue 1-3 https://doi.org/10.1016/j.jnucmat.2011.01.129	journal	April 2011
Microstructural characterization and pore structure analysis of nuclear graphite Kane, J.; Karthik, C.; Butt, D. P. Journal of Nuclear Materials, Vol. 415, Issue 2 https://doi.org/10.1016/j.jnucmat.2011.05.053	journal	August 2011
Pore structure development in oxidized IG-110 nuclear graphite Wang, Peng; Contescu, Cristian I.; Yu, Suyuan Journal of Nuclear Materials, Vol. 430, Issue 1-3 https://doi.org/10.1016/j.jnucmat.2012.07.015	journal	November 2012
Oxidation rate of nuclear-grade graphite NBG-18 in the kinetic regime for VHTR air ingress accident scenarios Lee, Jo Jo; Ghosh, Tushar K.; Loyalka, Sudarshan K. Journal of Nuclear Materials, Vol. 438, Issue 1-3 https://doi.org/10.1016/j.jnucmat.2013.03.002	journal	July 2013
Oxidation rate of nuclear-grade graphite IG-110 in the kinetic regime for VHTR air ingress accident scenarios Lee, Jo Jo; Ghosh, Tushar K.; Loyalka, Sudarshan K. Journal of Nuclear Materials, Vol. 446, Issue 1-3 https://doi.org/10.1016/j.jnucmat.2013.11.032	journal	March 2014
The relationship between microstructure and oxidation effects of selected IG- and NBG-grade nuclear graphites Huang, Wei-Hao; Tsai, Shuo-Cheng; Yang, Chia-Wei Journal of Nuclear Materials, Vol. 454, Issue 1-3 https://doi.org/10.1016/j.jnucmat.2014.07.052	journal	November 2014
Effects of air flow rate on the oxidation of NBG-18 and NBG-25 nuclear graphite Chi, Se-Hwan; Chan Kim, Gen Journal of Nuclear Materials, Vol. 491 https://doi.org/10.1016/j.jnucmat.2017.04.032	journal	August 2017
Understanding the reaction of nuclear graphite with molecular oxygen: Kinetics, transport, and structural evolution Kane, Joshua J.; Contescu, Cristian I.; Smith, Rebecca E. Journal of Nuclear Materials, Vol. 493 https://doi.org/10.1016/j.jnucmat.2017.06.001	journal	September 2017
Effect of temperature on graphite oxidation behavior Xiaowei, Luo; Jean-Charles, Robin; Suyuan, Yu Nuclear Engineering and Design, Vol. 227, Issue 3 https://doi.org/10.1016/j.nucengdes.2003.11.004	journal	February 2004
Oxidation experiments and theoretical examinations on graphite materials relevant for the PBMR Hinssen, Hans-Klemens; Kühn, Kerstin; Moormann, Rainer Nuclear Engineering and Design, Vol. 238, Issue 11 https://doi.org/10.1016/j.nucengdes.2008.02.013	journal	November 2008
Oxidation behavior of IG and NBG nuclear graphites Choi, Woong-Ki; Kim, Byung-Joo; Kim, Eung-Seon Nuclear Engineering and Design, Vol. 241, Issue 1 https://doi.org/10.1016/j.nucengdes.2010.10.007	journal	January 2011
NBG-17 – An improved graphite grade for HTRs and VHTRs Béghein, Philippe; Berlioux, Gérard; Mesnildot, Bruno du Nuclear Engineering and Design, Vol. 251 https://doi.org/10.1016/j.nucengdes.2011.10.060	journal	October 2012
Why Are Some Reactions Slower at Higher Temperatures? Revell, Laura E.; Williamson, Bryce E. Journal of Chemical Education, Vol. 90, Issue 8 https://doi.org/10.1021/ed400086w	journal	May 2013
Effects of reaction temperature and inlet oxidizing gas flow rate on IG-110 graphite oxidation used in HTR-PM Sun, Ximing; Dong, Yujie; Zhou, Yangping Journal of Nuclear Science and Technology, Vol. 54, Issue 2 https://doi.org/10.1080/00223131.2016.1233080	journal	September 2016
Comparison of Oxidation Behaviors of Different Grades of Nuclear Graphite Luo, Xiaowei; Robin, Jean-Charles; Yu, Suyuan Nuclear Science and Engineering, Vol. 151, Issue 1 https://doi.org/10.13182/NSE05-A2534	journal	September 2005

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