Separation of $CO_2$ and $N_2$ with a NaY Zeolite Membrane under Various Permeation Test Conditions

Cho, Churl-Hee; Yeo, Jeong-Gu; Ahn, Young-Soo; Han, Moon-Hee; Hyun, Sang-Hoon

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자료유형: 학술저널

저자정보: Cho, Churl-Hee (Functional Materials Research Center, Korea Institute of Energy Research) Yeo, Jeong-Gu (Functional Materials Research Center, Korea Institute of Energy Research) Ahn, Young-Soo (Functional Materials Research Center, Korea Institute of Energy Research) Han, Moon-Hee (Functional Materials Research Center, Korea Institute of Energy Research) Hyun, Sang-Hoon (Department of Ceramic Engineering, Yonsei University)

저널정보: 한국막학회 Korean Membrane Journal Korean membrane journal 제8권 제1호

발행연도: 2006.1

수록면: 21 - 30 (10page)

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A faujasite NaY zeolite membrane was prepared on a tubular ${\alpha}-Al_2O_3$ support by the secondary growth process, and effects of permeation test conditions on the $CO_2/N_2$ separation were investigated. A NaY zeolite membrane with good $CO_2/N_2$ separation was successfully synthesized by using the hydrothermal solution ($Al_2O_3:SiO_2:Na_2O:H_2O$ = 1:6:14:840 in a molar base): at a permeation temperature of $30^{\circ}C$, its $CO_2$ permeance and $CO_2/N_2$ separation factor were $2.5{\times}10^{-7}mol/m^2secPa$ and 34, respectively. The $CO_2$ and $N_2$ permeations were highly dependent on permeation test conditions (feed composition, feeding rate, feed pressure, He sweeping rate and permeation temperature). The results indicated that (i) $CO_2$ and $N_2$ permeations through NaY zeolite membrane are governed by surface and micropore diffusions, respectively, (ii) the preparation of NaY zeolite membrane with a large permeating area is one of the most difficult hurdles for its real applications, and (iii) the retardation of $N_2$ permeation is an effective key to improve $CO_2/N_2$ separation factor in NaY zeolite membrane.

#NaY zeolite membrane #$CO_2/N_2$ separation #permeation test conditions #surface diffusion #micropore diffusion

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