WATER VAPOR ADSORBENT HAVING HYGROSCOPIC SALT CARRIED ON GRANULATED BODY OF AMORPHOUS ALUMINUM SILICATE

PROBLEM TO BE SOLVED: To provide a water vapor adsorbent having not only high adsorptivity in a medium humidity range but also having excellent adsorptivity which can be regenerated at a low temperature of 40-60°C as a dehumidifying agent for heat accumulation or for batch type desiccant air-conditioning.SOLUTION: A water vapor adsorbent, which has a hygroscopic salt carried on a granulated body, having macro pores, of amorphous aluminum silicate, has excellent water vapor adsorptivity of around 30 wt.% by regeneration at 40°C and at relative humidity of 60%, around 40 wt.% by regeneration at 60°C and at relative humidity of 60%, and around 50 wt.% by regeneration at 100°C and at relative humidity of 60%, and can be used as an adsorbent for heat accumulation or for batch type desiccant air-conditioning.SELECTED DRAWING: Figure 1 【課題】 蓄熱用、バッチ式デシカント空調用除湿剤として、中湿度領域において高性能な吸着性能を有するのみならず、４０〜６０℃の低温にて再生が可能な優れた吸着性能を有する水蒸気吸着材を提供する。【解決手段】 非晶質アルミニウムケイ酸塩のマクロな細孔を有する造粒体に、吸湿性の塩を担持させてなる水蒸気吸着材は、４０℃の再生で相対湿度６０％において３０ｗｔ％程度、６０℃の再生で相対湿度６０％において４０ｗｔ％程度、１００℃の再生で相対湿度６０％において５０ｗｔ％程度の優れた水蒸気吸着性能を有し、蓄熱用、バッチ式デシカント空調用吸着材として用いることができる。【選択図】 図１