About this Research Topic
For most, if not all, applications of porous solids (e.g., gas separation and purification, water purification, energy storage, etc.), it is necessary to have a good idea about the adsorbent properties like porosity and adsorbent-adsorbate properties like equilibrium and kinetics. Adsorbent porosity characterization includes not only the total pore volume, but also the shape of the pores, the pore size distribution and the nature of the pore walls. Adsorbent-adsorbate equilibrium includes single and multi-component adsorption equilibria, and adsorbent-adsorbate kinetics or mass transfer includes single and multi-component diffusion in porous solids, both at different temperatures. These properties are required in the design, development and simulation of all separation and energy storage processes that utilize porous solids. Thus, the measurement and/or prediction of such properties by both conventional and unconventional techniques, with a preference on the latter, is imperative.
The purpose of this Research Topic is to get an overview of novel ways to not only characterize commercial and developmental porous adsorbents with regards to their porosity and the chemical and electrostatic nature of their pore walls, but also to extend this overview to the measurement and prediction of single gas and binary gas adsorption equilibria and kinetics in commercial and developmental porous adsorbents.
For characterization, this includes new adsorptives and new adsorption models. The adsorptives should either avoid the problems related to the current adsorptives (e.g. having a limited range of pore sizes, or having specific interactions with certain adsorbents) or present an added value (e.g. being able to determine both pore size distribution and nature of the pore walls). Recent examples are the use of Argon or water vapor. New models should be as generally applicable as possible and physico-chemically consistent. Recent examples are new forms of Density Functional Theory, based on physical and chemical heterogeneities in the pore walls.
For gas adsorbent-adsorbate equilibrium and kinetics, this includes new measurement techniques, new or important measurements of equilibrium or kinetics for adsorbent-adsorbate systems with current global interests, and new theoretical developments that predict either adsorption equilibrium or kinetics. Experimental and theoretical developments in gas adsorption equilibrium and kinetics for binary systems is of particular interest.
With respect to fundamental science, we welcome Original Research contributions in physisorption of gases for adsorbent characterization, adsorbent-adsorbate equilibrium and kinetics that can advance our basic understanding of gas adsorption phenomena. Topics of interest may include, but are not limited to:
• The use of new adsorptives and adsorption conditions for porous texture characterization.
• Interpretation of the adsorption of gas mixtures.
• New models and methods for the interpretation of adsorption isotherms and for the determination of pore size distributions.
• Application of gas adsorption for the characterization of new porous materials.
• New techniques in the measurement and/or prediction of single gas and binary adsorption equilibria and kinetics in commercial and developmental adsorbents.
• Measurement and prediction of single gas and binary adsorption equilibria in commercial and developmental adsorbents.
• Adsorption column dynamics in commercial and developmental adsorbents.
Keywords: adsorption, characterization, porous structure, kinetics of adsorption, dynamics of adsorption
Important Note: All contributions to this Research Topic must be within the scope of the section and journal to which they are submitted, as defined in their mission statements. Frontiers reserves the right to guide an out-of-scope manuscript to a more suitable section or journal at any stage of peer review.