TY - JOUR
T1 - Steam chemical reactivity of Be pebbles and Be powder
AU - Anderl, R. A.
AU - Pawelko, R. J.
AU - Smolik, G. R.
AU - Scaffidi-Argentina, F.
AU - Davydov, D.
N1 - Funding Information:
This work is supported by the US Department of Energy, Office of Fusion Energy Sciences, Idaho Operations Office, under Contract DE-AC07-94ID13223.
Funding Information:
Work supported by the US Department of Energy, Office of Science, under DOE Idaho Operations Contract DE-AC07-99 ID13727.
PY - 2000
Y1 - 2000
N2 - This paper reports the results of chemical reactivity experiments for Be pebbles (2-mm and 0.2-mm diameter) and Be powder (14-31 μm diameter) exposed to steam at elevated temperatures, 350 to 900 °C for pebbles and 400 to 500 °C for powders. We measured BET specific surface areas of 0.12 m2/g for 2-mm pebbles, 0.24 m2/g for 0.2-mm pebbles and 0.66 to 1.21 m2/g for Be powder samples. These experiments showed a complex reactivity behavior for the material, dependent primarily on the test temperature. Average H2 generation rates for powder samples, based on measured BET surface areas, were in good agreement with previous measurements for fully-dense CPM-Be. Rates for the Be pebbles, based on measured BET surface areas, were systematically lower than the CPM-Be rates, possibly because of different surface and bulk features for the pebbles, especially surface-layer impurities, that contribute to the measured BET surface area and influence the oxidation process at the material surface.
AB - This paper reports the results of chemical reactivity experiments for Be pebbles (2-mm and 0.2-mm diameter) and Be powder (14-31 μm diameter) exposed to steam at elevated temperatures, 350 to 900 °C for pebbles and 400 to 500 °C for powders. We measured BET specific surface areas of 0.12 m2/g for 2-mm pebbles, 0.24 m2/g for 0.2-mm pebbles and 0.66 to 1.21 m2/g for Be powder samples. These experiments showed a complex reactivity behavior for the material, dependent primarily on the test temperature. Average H2 generation rates for powder samples, based on measured BET surface areas, were in good agreement with previous measurements for fully-dense CPM-Be. Rates for the Be pebbles, based on measured BET surface areas, were systematically lower than the CPM-Be rates, possibly because of different surface and bulk features for the pebbles, especially surface-layer impurities, that contribute to the measured BET surface area and influence the oxidation process at the material surface.
UR - https://www.scopus.com/pages/publications/0034320838
U2 - 10.13182/FST00-A36141
DO - 10.13182/FST00-A36141
M3 - Article
AN - SCOPUS:0034320838
SN - 0748-1896
VL - 38
SP - 283
EP - 289
JO - Fusion Technology
JF - Fusion Technology
IS - 3
ER -