Hydrogen Permeability

Experimental Notes

At points during the study, the membrane was also shutdown under different conditions. This entailed cooling to room temperature while flushing the system with gas. Normally, the system was flushed with nitrogen, but other conditions were also studied.


• At 11, 23, 54, 73, 110, and, 176 days, the system was flushed with hydrogen while cooling to room temperature. This was done to test for hydrogen embrittlement.
  
  
• At 15, 76, and 135 days, the system was flushed with nitrogen at 300 C. The system was then exposed to air at 300 C for eight hours. This was done to test for membrane oxidation in the presence of air.
  
  
• The end of experiment at 220 days was caused by a technician's error. During membrane inspection, the technician accidently damaged the membrane. Otherwise, the experiment would probably still be running.