抄録
Fluidized bed system of photocatalyst is investigated for the preservation of atmospheric environment. A circulating fluidized bed (CFB) is adopted to develop the treatment system of large amount of exhaust gas. The composite particles of titania-silica are prepared by sol-gel method. The photocactalytic oxidation of nitrogen oxides (NOx) is studied. It is found that the gas-solid contacting in the riser part of CFB is important for the NOx treatment. The amount of TiO_2 content of the composite particles affects the cumulative amount of NOx treatment. The regeneration of photocatalytic activity can be achieved by heating. These findings can provide a basis for a proper reactor design toward successive treatment of large amount of gas such as tunnel exhaust gas using fluidized bed system.
