无机材料学报2023，Vol.38Issue(10)：1237-1244,8.DOI:10.15541/jim20230095
NaY沸石分子吸附涂层对典型空间污染物的吸附机制研究
Adsorption Mechanism of NaY Zeolite Molecular Adsorber Coating on Typical Space Contaminations
摘要
Abstract
In a high vacuum environment,some organic molecular pollutants such as hydrocarbon and siloxane are released by spacecraft materials and deposited on the surface of the sensitive parts of spacecraft devices,which has become an important adverse factor restricting the development of long-life and high-performance spacecraft.Zeolite molecular adsorber coating can effectively collect spatial contaminations in real time,but the adsorption mechanism is not clear.To deeply analyze the adsorption mechanism of zeolite on the spatial contaminations,the adsorption behaviors of NaY zeolite including adsorption isotherms,adsorption heat curves and density distributions on three typical contaminations,toluene(C7H8),dimethyl phthalate(C10H10O4),octamethyl cyclotetrasiloxane(C8H24O4Si4),were calculated by the Grand Canonical Monte Carlo method in this work.The NaY zeolites and pollutant models were successfully constructed,and the rationality of the models was verified by comparing simulated data with experimental ones.These results indicated that all three classic molecules can be adsorbed by NaY zeolite in the ultra-high vacuum condition.The saturated adsorption capacity decreases in the order of C7H8>C10H10O4>C8H24O4Si4,which is significantly related to the molecule sizes and structures of contaminations.The saturated adsorption amount of C8H24O4Si4 is relatively low(8 per cell)when that of C7H8 is 36 per cell.In addition,the density distributions indicates that different contaminations are preferentially adsorbed inside the super-cage of NaY zeolite.Overall,this work analyzes the adsorption mechanism of NaY zeolite on typical contaminations,and can provide basic insights for the development of zeolite molecular adsorber coating with high adsorption capacity.关键词
蒙特卡洛模拟/NaY沸石/吸附机理/空间污染物Key words
Monte Carlo simulation/NaY zeolites/adsorption mechanism/space contaminants分类
化学化工引用本文复制引用
戴洁燕,冯爱虎,米乐,于洋,崔苑苑,于云..NaY沸石分子吸附涂层对典型空间污染物的吸附机制研究[J].无机材料学报,2023,38(10):1237-1244,8.基金项目
National Natural Science Foundation of China(52202076) （52202076）
Youth Innovation Promotion Association CAS(2023261) （2023261）
Shanghai"Super Postdoctoral Fellow"Incentive Program(2020474) （2020474）
