Abstract

Zeolite 4A-impregnated complex molecular sieve was prepared by hydrothermal reaction after aluminosilicate gel was penetrated into the pore of activated carbon granule. The crystals of zeolite 4A mainly were formed in the macropore of activated carbon, and their average diameter is $0.8{\mu}m$. The pore volume of activated carbon granule is $0.67m{\ell}/g$, and the pore volume of the sample including 21.6wt% of zeolite 4A crystal is $0.41m{\ell}/g$ decreasing the pore volume by 40% due to the crystallization of zeolite 4A crystals on the internal surface of activated carbon. The calcium ion exchange capacity of zeolite 4A-impregnated sample is 320mg $CaCO_3/g$ zeolite, and this value is almost the same as that of zeolite 4A powder. The crystal of zeolite 4A was not separated from the support of activated carbon granule in the course of ultrasonic dispersion. The adsorption isotherm of water on zeolite 4A-impregnated sample shows the intermediate shape between types, I and III. In addition, zeolite 4A-impregnated sample shows the hydrophilic and hydrophobic properties simultaneously.

Keywords

File

Download PDF

References

1. Zeolite Molecular Sieves D. W. Breck
2. Molecukar Sieve Catalysts P. Michiels;O. C. E. De Herdt
3. Angew. Chem. Int. Ed. Engl. v.28 G. A. Ozin;A. Kuperman;A. Stein
4. Journal of Membrane Science v.82 M. D. Jia;K. V. Peinemann;R. D. Behling
5. J. Chem. Soc. Faraday Trans. v.88 E. R. Geus;M. J. den Exter;H. van Bekkum
6. Bull. Chem. Soc. Jpn. v.65 T. Sano;F. Mizukami;H. Takaya;T. Mouri;M. Watanabe
7. Journal of Membrane Science v.57 M. D. Jia;K. V. Peineman;R. D. Behling
8. Zeolites v.15 V. Valtchev;S. Mintova
9. Physical Metallurgy, Metallurgy R. Cahn;P. Haasen
10. Chem. Mater. v.2 S. Davis;E. Borgstedt;L. Suib
11. ASTM, D511-88 ASTM
12. J. Am. Chem. Soc. v.62 S. Brunauer
13. J. of Chem. Eng. of Jpn. v.16 G. Horvath;K. Kawazoe