서지주요정보
다단계 기공구조개선에 의한 알루미나막 제조 및 수소분리특성 = Preparation of alumina membrane via multistep pore modification and hydrogen separation characteristics
서명 / 저자 다단계 기공구조개선에 의한 알루미나막 제조 및 수소분리특성 = Preparation of alumina membrane via multistep pore modification and hydrogen separation characteristics / 윤건영.
저자명 윤건영 ; Yoon, Keon-Yeong
발행사항 [대전 : 한국과학기술원, 1996].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8006573

소장위치/청구기호

학술문화관(문화관) 보존서고

MCHE 96018

SMS전송

도서상태

이용가능

대출가능

반납예정일

초록정보

In this study, inorganic membrane that can be used under high temperature, high pressure difference for hydrogen separation was prepared by three consecutive steps ; namely, sol-gel technique, in-situ hydrolysis of TEOS, and soaking and vapor deposition(SVD). First, we apply sol-gel technique onto the $α-Al_2O_3$ support that has an asymmetric structure and pore size of 80 nm. In this step, $\gamma-Al_2O_3$ sol mixed with Pd precursor is coated onto the support by dip-coating method followed by calcination at 500℃. After repeating the sol-gel precedure several times, support pores were further modified by in-situ hydrolysis of TEOS and $H_2O$ in the cylindrical pores of the membrane. In this step, TEOS vapor flows into the outside of the membrane and water vapor flows into the inside of the membrane. The two vapors react in the middle of the support and forms a layer of $SiO_2$. This method is very effective in narrowing the pores of the membrane and the membrane prepared by this method is very effective especially when the transmembrane pressure is relatively high. To enhance the hydrogen selectivity of the membrane, the membrane was further modified by Soaking and Vapor Deposition (SVD) method onto the membrane. In the SVD step, the metal source, palladium(Ⅱ) acetate, was decomposed in pores in nitrogen atmosphere. During SVD, temperature is gradually increased from room temperature to 180℃ under reduced pressure. We formed an intermediate layer of palladium in the vicinity of the interface between the two layers of the support. The membrane prepared by this multistep method shows a good hydrogen selectivity at high temperature and at high transmembrane pressure(?P). The separation factor of hydrogen and nitrogen is above the Knudsen limit(3.74) up to $\Delta$P = 35psi.

서지기타정보

서지기타정보
청구기호 {MCHE 96018
형태사항 vi, 56 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Keon-Yeong Yoon
지도교수의 한글표기 : 양승만
지도교수의 영문표기 : Seung-Man Yang
학위논문 학위논문(석사) - 한국과학기술원 : 화학공학과,
서지주기 참고문헌 : p. 54-56
주제 무기막
가수분해
졸젤법
기체분리
Inorganic Membrane
SVD
Hydrolysis
Sol-Gel method
Gas separation
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