燃料化学学报（中英文）2026，Vol.54Issue(9)：97-108,12.DOI:10.1016/S1872-5813(26)60687-1
小孔菱沸石选择性吸附CO2的性能研究
Selective adsorption behaviors of CO2 in small-pore chabazite zeolites
摘要
Abstract
Chabazite-type(CHA)zeolite is considered to be a highly promising CO2 adsorption material due to is unique pore structure.However,the underlying adsorption kinetics of CHA zeolite still need to be studied to facilitate development of efficient adsorbents.In this study,the preparation method,CO2 adsorption kinetics,and thermodynamic properties of CHA zeolite are investigated.CHA zeolite is synthesized from hydrogen type faujasite-type(H-FAU)zeolite using a transformation method.By modulating the ratios of n(KOH)/n(SiO2),n(H2O)/n(SiO2),crystallization temperature,and crystallization time during the synthesis process,the optimal synthesis conditions for CHA zeolite are explored based on X-Ray Diffraction(XRD)and scanning electron microscopy(SEM)of the as-synthesized materials.The CO2 adsorption performance of the prepared CHA zeolite is tested and evaluated using both dynamic and static measurements.Different kinetic models are applied to analyze the kinetic behavior of the adsorption process.Among them,the Avrami equation yields a good fit to illustrate the adsorption process of studied zeolites(R2＞0.99).With increasing temperature,the adsorption process reach equilibrium more quickly due to the enhanced adsorption rate.The selectivity also increases with increasing temperature,indicating that the adsorption process of CO2 on CHA zeolite is mainly controlled by diffusion.Breakthrough data and thermodynamic analysis show that the material's interaction with CO2 is stronger than that with N2,yet the CO2 adsorption is still dominated by physical interactions.The weak adsorption strength between CO2 and CHA zeolite is conducive to gas desorption.These findings provide a theoretical support for optimizing industrial adsorption operating conditions.关键词
菱沸石/CO2吸附/沸石转晶/吸附动力学/Avrami模型Key words
chabazite/CO2 adsorption/zeolite crystallization/adsorption kinetics/Avrami model分类
化学化工引用本文复制引用
彭福斌,崔粲,申宝剑,徐春明,任申勇,王久江,刘尚书,陶欣,赵红娟,刘宏海,谷敏,朱晓丹..小孔菱沸石选择性吸附CO2的性能研究[J].燃料化学学报（中英文）,2026,54(9):97-108,12.基金项目
Supported by Innovative Research Groups of the National Natural Science Foundation of China(22021004). （22021004）
