ENVR 51 |
| We have started a series of deuterium (and hydrogen) gas charging experiments with Pd nano-powders to study possible heat evolution and D (or H)-loading characteristics by using a revised Arata-type twin system. The twin system is made of identically designed A1 and A2 systems, in each of which an inner gas-charging cell with flow calorimeter and an outer vacuum chamber are set up. The A1 system is used for D-gas foreground run, and the A2 system is for the H-gas blank run. Our first data with two commercially available Pd powders (0.1 micron Pd particles and Pd-black) are already meaningful. Experiments with Pd-black sample gave 2.6 kJ/g-Pd excess heat for the second phase of 1,300 minutes operation and D/Pd=0.85 for the first phase (about 100 min interval from start) with zero D-gas pressure. No excess heat with H-gas charging was seen with H/Pd=0.78. Experiments with 0.1 micron Pd powders gave D/Pd =0.45 for the first phase and much less excess heat for the second phase. We are extending experiments for nano-fabricated Pd samples to be reported at the meeting. In situ radiation monitors are for neutron and gamma-ray. Elemental analysis of "before/after" samples is done by PIXE. 4He detection will be also tried. |
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New Energy Technology
1:30 PM-4:50 PM, Monday, March 23, 2009 Hilton -- Alpine Ballroom West, Oral
Division of Environmental Chemistry |