کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1569956 1514272 2006 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Analysis of geometrical effects on graphite oxidation through measurement of internal surface area
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی هسته ای و مهندسی
پیش نمایش صفحه اول مقاله
Analysis of geometrical effects on graphite oxidation through measurement of internal surface area
چکیده انگلیسی

To investigate the geometrical effects on nuclear graphite oxidation in the regime where the chemical effect is the rate-controlling process, we introduce the concept of internal surface density into the Arrhenius-type reaction model and suggest how to determine it experimentally. Using the 16 different samples of IG-110 graphite, which have different ratios of external surface to volume, we obtained the value of internal surface density as 17 260 m−1. We found out that the external surface reaction is very small compared to the total reaction for the IG-110 graphite: the ratio of the external surface reaction to the total reaction was within 5%. Finally, we propose the following reaction equation for this material:r‴(kg/m3s)≈2552000·exp-218000R·T·PO20.75.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Nuclear Materials - Volume 348, Issues 1–2, 1 January 2006, Pages 174–180
نویسندگان
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