Dear Colleagues,

The Special Issue, “Conversion of Fly Ash into Zeolites and Their Application as Adsorbents of Carbon Dioxide”, will address novel approaches and the optimization of existing ones for the utilization of coal fly ash from the combustion of coals through its conversion into zeolite-like materials. Non-modified and modified coal fly ash zeolites reveal a high carbon capture potential and are considered to be efficient and low-cost CO₂ adsorbents. Coal fly ash zeolites are distinguished from zeolites synthesized from pure starting materials in a significant content of iron oxides and variety of metal traces transferred from the raw material, as well as with a particular micro-mesoporous structure that predetermines strong surface unsaturation and facilitated mass transfer processes. These features define coal ash zeolites as a new class of materials with very promising valuable applications, especially in carbon capture systems. The utilization of coal ash in low-carbon technologies is of great research and technological interest and will contribute to a number of environmental benefits: reduction of coal ash deposits, preservations of natural resources and raw materials, development of affordable technological solutions for wide implementation to capture carbon emissions from thermal and industrial plants. This Special Issue aims to collect original research papers and reviews on the conversion of coal fly ash into zeolites and their application for CO₂ adsorption. Both experimental and model studies are of particular interest. Articles and reviews dealing with CO₂ adsorption at low and high pressures and regeneration of coal fly ash zeolites, adsorption/desorption cycles, elucidation of adsorption mechanisms through thermodynamic studies, kinetic models, studies on the influence of various components included into the coal ash zeolite matrix onto carbon capture potential, and studies on selectivity and capacity of CO₂ adsorption in equilibrium and dynamic conditions are very welcome. Of great interest are publications on dual systems based on coal fly ash zeolites for CO₂ capture and its catalytic transformation to synthetic fuels or chemical products.

Dr. Sylvia Boycheva
Guest Editor

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• coal fly ash zeolites
• Surface studies
• CO₂ adsorption
• adsorption kinetics
• thermodynamics of CO₂ adsorption
• modified coal fly ash zeolites
• pressure-swing adsorption
• vacuum-swing adsorption
• catalytic CO₂ conversion
• CO₂ capture modeling