Hfaiedh Yosra, Hachem Houda, Mihoubi Daoued
Energy Research and Technology Center (CRTEn), BP 95, Hammam-Lif 2050, Tunisia.
National Engineering School of Monastir, University of Monastir, Ibn El Jazzar, Monastir 5019, Tunisia.
ACS Omega. 2024 Oct 8;9(42):42957-42969. doi: 10.1021/acsomega.4c05892. eCollection 2024 Oct 22.
Modern materials science has made significant progress in creating new materials and processes for waste recovery. One such advancement involves the development of a new porous composite material made from clay and an environmentally sustainable eggshell powder. In this study, the dynamic behavior of water vapor during desorption and adsorption processes within this composite material was investigated. The moisture diffusivity coefficient was determined within the clay/eggshell powder composite material. The drying kinetic data were analyzed using various models such as Newton, Page, and Wan and Singh. The static gravimetric vapor adsorption/desorption experiments were conducted at different temperatures (30, 40, 50, 60, and 70 °C) to depict the material's capacity for absorbing and releasing moisture over time. The experimental isotherm data were fitted using different mathematical models (Guggenheim, Anderson, and De Boer, Peleg, Adam and Shove, Oswin, and Modified Henderson). The findings suggest that integrating eggshell powder with clay can significantly influence the behavior and characteristics of the resultant material. The combination of eggshell powder and clay reduces moisture sorption and accelerates the drying process. Consequently, this affects the porosity, permeability, and response to humidity changes.
现代材料科学在创造用于废物回收的新材料和新工艺方面取得了重大进展。其中一项进展涉及开发一种由粘土和环境可持续的蛋壳粉制成的新型多孔复合材料。在本研究中，研究了这种复合材料在解吸和吸附过程中水蒸气的动态行为。测定了粘土/蛋壳粉复合材料中的水分扩散系数。使用牛顿、佩奇、万和辛格等各种模型对干燥动力学数据进行了分析。在不同温度（30、40、50、60和70°C）下进行了静态重量法蒸汽吸附/解吸实验，以描述材料随时间吸收和释放水分的能力。使用不同的数学模型（古根海姆、安德森和德布尔、佩莱格、亚当和肖夫、奥斯温以及修正的亨德森）对实验等温线数据进行了拟合。研究结果表明，将蛋壳粉与粘土结合可以显著影响所得材料的行为和特性。蛋壳粉和粘土的组合降低了水分吸附并加速了干燥过程。因此，这会影响孔隙率、渗透率以及对湿度变化的响应。
