Gas Adsorption Characteristics of Cation-Exchanged Natural Zeolite
Natural zeolite which originated from Pohang, Korea, was tested to investigate its use as gas adsorbent. Natural zeolite was treated with 1 mol/l sodium, potassium, calcium, magnesium and ammonium chloride solution to exchange cations in the zeolite to the specific cation, respectively. Cation- exchanged zeolites were activated at 423K, 673K and 873K for 30 minutes under atmospheric pressure.
Specific surface, the amount of adsorbed CO2 and NH3 were evaluated for each cation- exchanged and heat-treated zeolite. The specific surface of zeolite activated at 873K increased 2 times for NH4-Type and decreased to 50% for other cation types. The amount of each adsorbed gas varied depending on cation types and activation temperature. NH4-type zeolite activated at 873K showed the highest amount of adsorption among the tested samples and showed the possibility to be used as gas adsorbent.
KeywordsAdsorption Isotherm Activation Temperature Heat Treatment Temperature Natural Zeolite Sample Zeolite
Unable to display preview. Download preview PDF.
- 2.Barrer, R.M., J. Soc. Chem. Ind., 44,130 (1945)Google Scholar
- 4.Moore, WJ., Physical chemistry(3rd) Prentice Hall(1962)Google Scholar
- 5.Jong-Taek Kim, Jong-Rak Sohn, Won-Hyung Choi and Hae-Won Kim, Hwahak gonghak, 17,5,331(1979)Google Scholar
- 6.T. Kishi, Nendokagaku, 12,23(1972)Google Scholar
- 7.Breck, D.W., Zeolite Molecular Sieve, John Wiley (1974)Google Scholar
- 8.Ki-Sung Ha,Hwahakgonghak, 25, 4,409 (1987)Google Scholar
- 9.Torii, K, M. Hotta and M. Asaka, Nendokagaku, 15,123 (1975)Google Scholar