Hydrogen Production from the Solar Based LASL Cadmium Cycle

摘要

A thermochemical H sub 2 cycle is presented where the high temperature step can be powered by a solar heat source. The cycle consists of three reactions: the thermal decompositions of CdO and CdCO sub 3 and the oxidation of Cd using water and CO sub 2 to form CdCO sub 3 and H sub 2 . Experimental data is presented which indicates that CdO(g) is less stable than previously thought. Kinetic studies of the H sub 2 producing reaction show both Pd and NH sub 4 Cl to be good catalysts. NH sub 4 Cl, although introducing more possibilities for side reactions, appears to be the better catalyst. Drying studies on CdCO sub 3 show that water retention problems are minimal. (ERA citation 05:025451)