Investigation of adsorption of water vapor on porous aluminium oxide material

16th International Conference of Students and Young Scientists "Prospects of Fundamental Sciences Development"

自然科学（总论）

Reshetnikov, S.^1 ; I., Kurzina

Boreskov Institute of Catalysis SB RAS, 5 Lavrentieva Avenue, Novosibirsk

630090, Russia^1

Tomsk State University, 36 Lenina Avenue, Tomsk

634050, Russia^2

关键词: Adsorption of water vapors;    Diffusion limitations;    Effective diffusion coefficients;    Experimental verification;    Laboratory equipments;    Quasi-homogeneous models;    Theoretical investigations;    X-ray phase analysis;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/597/1/012011/pdf
DOI  :  10.1088/1757-899X/597/1/012011

学科分类：自然科学（综合）

来源: IOP

【 摘 要 】

This paper deals with theoretical investigation and experimental verification of adsorption dynamics (kinetics) of water vapor on aluminium oxide material. Influence of vapor flow rate and grain size of the adsorbent on adsorption dynamics was carried out on a laboratory equipment using McBain-Bakr quartz balance. The flow rate at which there is no influence of external diffusion limitations was determined. The material was characterized by the BET method and X-ray phase analysis (XRD). The theoretical effective diffusion coefficient was predicted from the known structure of the adsorbent. Mathematical modeling of the mass transfer rates are based on a quasi-homogeneous model was performed. A comparison between theory and experiments for the various grain size adsorbent samples allows to determinate of the effective diffusion coefficient Deff.