论文信息 - Adsorption equilibria and kinetics of CO2, CH4 and N2 in natural zeolites

Adsorption equilibria and kinetics of CO2, CH4 and N2 in natural zeolites

Abstract The ability of natural zeolites (ZAPS, ZNT and ZN-19) to adsorb pure CO 2 , CH 4 and N 2 was studied experimentally. The volume of CO 2 adsorption in the monolayer (Langmuir) was found to be close to the micropore volume estimated by the Dubinin–Astakhov model (N 2 , 77 K) for all three zeolites. Considerable differences in the adsorption of CO 2 , CH 4 , and N 2 with these zeolites were observed, a factor that can be used for the separation of CO 2 –CH 4 and N 2 –CH 4 mixtures. The mechanism of activated diffusion was detected in the adsorption of CH 4 with ZN-19.

[1] A. C. Macleod,et al. Heats of sorption of gases in chabazite, energetic heterogeneity and the role of quadrupoles in sorption , 1959 .

[2] V. P. Shiralkar,et al. Sorption properties of cation-exchanged beta zeolites , 1992 .

[3] R. Sheppard,et al. CHEMICAL COMPOSITION AND PHYSI CAL PROPERTIES OF THE RELATED ZEOLITES OFFRE TITE AND ERIONITE1 , 1969 .

[4] V. P. Shiralkar,et al. Carbon dioxide sorption isotherms in LTL zeolites , 1993 .

[5] Donald W Breck,et al. Zeolite Molecular Sieves: Structure, Chemistry, and Use , 1974 .

[6] E. Teller,et al. On a Theory of the van der Waals Adsorption of Gases , 1940 .

[7] F. Rodríguez-Reinoso,et al. The combined use of different approaches in the characterization of microporous carbons , 1989 .

[8] W. Nokleberg,et al. Clinoptilolite and ferrierite from Agoura, California , 1969 .

[9] R. G. Donnelly,et al. Methane/Nitrogen Gas Separation over the Zeolite Clinoptilolite by the Selective Adsorption of Nitrogen , 1983 .

[10] W. K. Lewis,et al. Adsorption Equilibria Hydrocarbon Gas Mixtures. , 1950 .

[11] R. Sips,et al. On the Structure of a Catalyst Surface , 1948 .