Czuma Natalia, Casanova Ignasi, Baran Paweł, Szczurowski Jakub, Zarębska Katarzyna
AGH University of Science and Technology, Faculty of Energy and Fuels, al. A. Mickiewicza 30, 30-059, Kraków, Poland.
Universitat Politècnica de Catalunya, Institute of Energy Technologies, Campus Sud, ETSEIB, Av. Diagonal, 647, 08028, Barcelona, Spain.
Sci Rep. 2020 Feb 4;10(1):1825. doi: 10.1038/s41598-020-58591-6.
Production of fly ash zeolites may be an attractive method for the utilization of solid wastes from the energy sector. Different methods of synthesis often yield a variety of zeolite types, thereby affecting the properties of the resulting materials. The attention paid to carbon dioxide emission reduction technologies fully justifies the study of the sorption behaviours of fly ash zeolites synthesized by different methods. This work investigates the sorption properties of fly ash zeolites synthesized with different methods using CO. Sorption capacity and adsorption isotherms were determined following the volumetric method and textural parameters were resolved according to the Dubinin-Astakhov (DA) method. The CO sorption capacity was in the range 0.24-4.16 mmol/g. The relationships between structure and sorption behaviour were studied for each synthesis method. Some strong similarities between commercial zeolites and fly ash zeolites were found. The mechanism for sorption was proved to be physisorption which is fully reversible under selected conditions. The observed trends were used to identify the best sorbent.
生产粉煤灰沸石可能是一种利用能源行业固体废物的有吸引力的方法。不同的合成方法通常会产生多种沸石类型，从而影响所得材料的性能。对二氧化碳减排技术的关注充分证明了研究不同方法合成的粉煤灰沸石吸附行为的合理性。这项工作研究了用不同方法合成的粉煤灰沸石对一氧化碳的吸附性能。采用容量法测定吸附容量和吸附等温线，并根据杜比宁-阿斯塔霍夫（DA）法解析结构参数。一氧化碳吸附容量在0.24-4.16 mmol/g范围内。针对每种合成方法研究了结构与吸附行为之间的关系。发现商业沸石和粉煤灰沸石之间有一些很强的相似性。吸附机制被证明是物理吸附，在选定条件下是完全可逆的。利用观察到的趋势来确定最佳吸附剂。
