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Polyacrylonitrile-derived activated carbon as a model of coal char has been heated in high-purity He at 10°C/min up to 1000°C with a flow-type fixed bed quartz reactor, and the catalysis of N 2 formation by precipitated iron has been investigated by use of XPS, TEM and XRD methods. Fine iron particles with the average size of 15nm increase remarkably the formation rate between 600 and 1000°C,...
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