Metal-monolithic catalyst for selective co methanation

Recently, it was reported that 1 wt%Ru/Ni-Al mixed oxides showed excellent catalytic activity for selective CO methanation in the fundamental experiment by our group. In this work, the realistic catalytic performance of this catalyst for a fuel processor of residential polymer electrolyte fuel cells was investigated. The catalyst was coated into metallic monoliths with external diameter of 100 mm. High CO removal activity and selectivity was obtained by realistic test containing 0.2-0.8% CO in the feed gas, the same feed gas composition used for the basic experiments. The catalyst was placed at the last stage in 1 kW fuel processor, which achieved 8 ppm-levels CO (99.9% CO removal) with long-time stability from 0.8% CO (GHSV=2400 h'1) level, flowed out from water-gas-shift reactor.