DEHUMIDIFICATION BEHAVIOR OF METAL(TI, AL, MG) SILICATES IMPREGNATED CERAMIC FIBER SHEETS

摘要

Ceramic sheets with magnesium silicate, aluminum silicate, titanium silicate adsorbents were prepared by sol-gel based incorporation process of Mg, Al and Ti ions into silica-impregnated ceramic sheets. In all the adsorbent-impregnated ceramic sheets, there were two kinds of pores: one was the micropore with diameter less than 3nm and the other was the diffuse mesopore with diameter of 3 to 10nm. In cases of the pure silica and magnesium silicate-impregnated ceramic sheets, the average diameter of the mesopores was 4nm. On the other hand, the aluminum and titanium silicate-impregnated ceramic sheets have the mesopores with average diameter of 5nm and with more wide size distribution. In the aluminum and titanium silicate-impregnated ceramic sheets, the micropores were well developed, compared with the pure silica and magnesium silicate-impregnated ceramic sheets. The aluminum and titanium silicate-impregnated ceramic sheets showed better dehumidification behavior than the silica and magnesium silicate-impregnated ceramic sheets. The superior dehumidification efficiency originates from the well developed micropores.