A new model for water adsorption in porous ceramics

作者：Dinh Hieu Vu^*; Wang Kuen Sheng; Chen Jung Hsing; Bui Xuan Nam; Bui Hoang Bac; Do Van Binh

来源：Journal of Porous Materials, 2013, 20(1): 129-136.

DOI：10.1007/s10934-012-9581-2

• Model
• Water adsorption
• Mesoporous ceramic
• Cluster
• Capillary condensation

This research proposes a new isotherm model that is derived for adsorption of clustering and condensable vapors on mesoporous ceramics. The adsorption characteristics of water vapor on both experimental data and isotherm model were investigated over the relative pressure ranging from 0 to 0.95. The applicability of the model was evaluated by significance of fitting parameters. For each adsorption isotherm there are five parameters (m, q (f) , K (f) , q (m) and K (m) ). The comparison of modeling fit with experimental data was used as the methodology for selecting the most informative and the best-fitting model. The experimental testing results showed that this model is able to describe all possible behaviors of the water adsorption isotherm displaying type IV classification. The model is based on the forming and growth of the water molecule clusters and capillary condensation mechanism in mesopore. The findings suggest a significant tool for understanding the behavior of water adsorption in humidity-control porous ceramics.

• 出版日期2013-2
• 单位中央民族大学