No.33 ペロブスカイト担持炭酸カリウムの炭素燃焼における触媒活性 : 細孔径の効果と反応メカニズム(ガス化・燃焼・液化(3))

抄録

We studied catalytic activity of alkali metal carbonate (K_2CO_3) supported perovskite type oxide for carbonaceous materials having distinguished pore size. Alkali metal salts are believed to be active through the reduction to the metallic state, staying on the carbon surface or migration from one carbon particle to another. In case of catalyst supported perovskite type oxide, three catalytic reaction steps appeared for microporous carbon combustion around 473-723K, at much lower than melting temperature of K_2CO_3. Results were discussed from the view point of the reductive activation of the alkali metal carbonate, sublimation, trapping and escape of the active species on the support in the catalytic combustion.