DPB Progress Report: Hydrogen Uptake Capacity for a Particular Sample of DPB.

Dinh, L. N. ; Schildbach, M. A. ; Maxwell, R. S. ; Balazs, B. ; McLean, W.

Technical Information Center Oak Ridge Tennessee

关键词: Hydrogen;    Capacity;    Microbalances;    Pumping;    Quartz;   

RP-ID  :  DE200515011406

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

The authors have performed hydrogen uptake to measure the remaining capacity for two DPB pellet samples. The measurements were made with a Cahn microbalance operating at room temperature. The DPB samples were placed inside a quartz boat and the microbalance was then evacuated to a base pressure of 10(sup -4) Torr overnight. This overnight pumping removed volatile contaminants from the DPB pellets prior to the introduction of 600 Torr of N(sub 2) into the microbalance chamber. Next, a leak valve connecting the microbalance with a research grade source of H(sub 2) was opened to add 100 Torr of H(sub 2) on top of the 600 Torr of N(sub 2) already in the microbalance. When the total pressure in the microbalance reached 700 Torr, the H(sub 2) leak valve was not completely shut off but reduced to a very small positive rate.