材料科学
湿度
毛细管冷凝
吸附
解吸
水分
相对湿度
多孔性
催化作用
砖
含水量
化学工程
烧结
比表面积
介孔材料
废物管理
复合材料
化学
有机化学
物理
工程类
岩土工程
热力学
作者
Ya‐Wen Lin,Bo-Xuan Zhang,Chun-Ping Lin,Yihong Chen,Kae‐Long Lin
标识
DOI:10.1016/j.jobe.2024.109362
摘要
This study uses waste bricks and waste catalyst as raw materials in the synthesis of humidity control building materials with high structural strength. This paper explores the feasibility of producing porous humidity control materials (PHCM) through the billet sintering of waste brick with various quantities of waste catalyst (0% to 40%) for indoor construction. N2 adsorption and desorption isotherms revealed that PHCM exhibits Type-IV adsorption with H3 hysteresis loops, indicating a network of interconnected mesopores with diameters ranging from 3 to 17 nm. Humidity control analysis revealed that increasing the waste catalyst content significantly enhanced the equilibrium moisture content and moisture adsorption and desorption capacity. This study determined that the adsorption of moisture within the PHCM relies on capillary condensation within the mesopores. Under 95% relative humidity (RH), the highest equilibrium moisture content (2.97 kg/kg) and 12-h moisture adsorption capacity (72.41 g/m2) were obtained in specimens prepared at a sintering temperature of 1000°C with a 40% spent catalyst. This excellent adsorption capacity can be attributed to the high surface area of the waste catalyst, which increased the surface area of PHCM from 0.013 to 8.529 m2/g. This study demonstrates the benefits of synthesizing PHCM using waste bricks and catalysts in terms of porous properties, mechanical properties, and humidity control performance.
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