Browse > Article
http://dx.doi.org/10.9713/kcer.2015.53.3.339

A Study on Dealumination of NaY Zeolite and its VOCs Adsorption Properties  

Kang, Shinchoon (Department of Chem. Engineering, Hanyang University)
Lee, Hwayeol (Department of Chem. Engineering, Hanyang University)
Park, Yeungho (Department of Chem. Engineering, Hanyang University)
Publication Information
Korean Chemical Engineering Research / v.53, no.3, 2015 , pp. 339-349 More about this Journal
Abstract
In this work, DAY (Dealuminated Y-type) zeolites were prepared to be used as easily regenerable and thermally stable adsorbent substituting activated carbon. NaY zeolites were transformed into DAY zeolites through ion exchange, calcination, steaming, and acid leaching. Calcination temperature and time, and steaming time were changed to increase the Si/Al ratio and maintain crystallinity. Adsorption of VOCs were done for prepared DAY, commercial NaY and Hisiv 1000 in air with relative humidity of 50%. The DAY zeolite prepared by calcination at $520^{\circ}C$ for 4 hrs and steaming for 7 hrs had a same structure and a Si/Al ratio of 80.4. Its adsorption capacity for water vapor was 10% of NaY, indicating its hydrophobicity. Its adsorption capacity for MEK was 0.8 times of Hisiv 1000, that for toluene 1.6 times, and that for EA 1.3 times.
Keywords
Dealumination; NaY Zeolite; VOCs; Adsorption; Hydrophobicity;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 Kim, S. S., Lee C. H. and Park, S. W., "Adsorption Analysis of VOCs of Zeolite Synthesized by Coal Fly Ash in a Fixed-bed Adsorber," Korean Chem. Eng. Res., 48(6), 784-790(2010).
2 Kerr, G. T., "Hydrogen Zeolite Y, Ultrastable Zeolite Y, and Aluminum-Deficient Zeolites," Adv. Chem. Ser., 121, 219(1973).   DOI
3 Breck, D. W., "Zeolite Molecular Sieves," J. Wiley, New York(1974).
4 Kerr, G. T., "Chemistry of Crystalline Aluminosilicates. V. Preparation of Aluminum-deficient Faujasites," J. Phys. Chem., 72, 2594(1968).   DOI
5 McDaniel, C. V. and Maher, P. K., "Molecular Sieves," Soc. Chem. Ind., London, 186(1967).
6 Scherzer, J. and Bass, J. L., "Infrared Spectra of Ultrastable Zeolites Derived from Type Y Zeolites," J. Catal., 28, 101(1973).   DOI
7 Vedrine, J. C., Abou-Kais, A., Massardier, J. and Dalmai-Imelik, G., "ESR Study of Deep-bed Calcined NH4Y and Aluminum Deficient Zeolites," J. Catal., 29, 120(1973).   DOI
8 Scherzer, J., "Catalytic Materials: Relationship," ACS Symp. Ser. Am. Chem. Soc., 248(1984).
9 Lee, D. G., Han, Y. J. and Lee, C. H., "Steam Regeneration of Acetone and Toluene in Activated Carbon and Dealuminated Y-zeolite Beds," Korean J. Chem. Eng., 29(9), 1246-1252(2012).   DOI
10 Freude, D., Oehme, W., Schmiedel, H. and Staudte, B., "NMR Investigation of Proton Mobility in Zeolites," J. Catal., 32, 137(1974).   DOI
11 Kliknowski, J. et al., "Dealumination of Mordenite Using Silicon Tetrachloride Vapour," Zeolite, 3, 5(1983).   DOI
12 Fejes, P., Hannus, I. and Kirichi, I., "Dealumination of Zeolites with Phosgene," Zeolite, 4, 73(1984).   DOI
13 Seo, D. N., "Synthesis of NaY Zeolites and Dealumination,"Ms. Thesis, Hanseo Univ., (2001).
14 Sherzer, J., "Dealuminated Faujasite-type Structures with $SiO_{2}Al_{2}O_{3}$ Ratios," J. Catal., 54, 285(1978).   DOI
15 Meininghaus, C. K. W. and Prins, R., "Sorption of Volatile Organic Compounds on Hydrophobic Zeolites," Microporous Mesoporous Mater., 35-36, 349(2000).   DOI