Hydrogenation of Co and C during Mechanical Treatment of Zr and Ni Containing Systems

Processes of CH4 and C2H6 formation during mechanical treatment of NiZrHx, ZrHx, NiZr, Zr, Ni, and Zr+Ni in the presence of CO + H-2 or CO atmosphere as well as the mechanochemical reaction of hydrides with carbon (graphite) have been investigated using X-ray, chemisorption, thermodesorption, mass-spectroscopy and chromatography. It was found that 1) the rate of methane formation decreases when Ni is included into the systems, 2) 100% hydrogen of hydrides may be converted into methane in mixtures of the hydrides with carbon, 3) in the presence of CO the major part of hydrides hydrogen is evolved in a molecular form while only <15% of H-2 is expended for the methane formation. The results are discussed in terms of mechanochemical reactions of Zr with gases.