鋳物廃砂のギ酸吸着反応特性

抄録

The Adsorption and reaction of formic acid were studied on waste mold sand for its application to the removal of injurious acid gases. The mold sand containing sodium carbonate chemisorbed completely formic acid vapor (4.4 vol% in air) at 50°C. The sm aller the particle size of sand, the higher the rate of adsorption, the particle size of 30 μm being the best choice. The catalytic decomposition of formic acid was observed at temperatures higher than 100°C.
The sand accelerated preferentialy the dehydration reaction at temperatures lower than 275°C, but at higher temperatures both dehydration and dehydrogenation reactions were catalyzed.
The waste mold sand can be used as a catalyst material for the removal of formic acid vapor.