Membrane Journal (멤브레인)

The Membrane Society of Korea (한국막학회)
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Separation of $H_2$/$N_2$ Gas Mixture by SiO$_2$-B$_2$O$_3$ Membrane

SiO$_2$-B$_2$O$_3$ 막에 의한 수소/질소 혼합기체 분리

  • Published : 2004.12.01
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Abstract

The porous SiO$_2$-B$_2$O$_3$ membrane was prepared from Si(OC$_2$$H_5$)$_4$-($CH_3$O)$_3$B-C$_2$$H_5$OH-$H_2O$ system by sol-gel method. In order to investigate the characteristics of this membrane, we examined that using BET, IR spectrophotometer, X-ray diffractometer, SEM and TEM. At $700^{\circ}C$, the surface area of SiO$_2$-B$_2$O$_3$ membrane was 354.398 $m^2$/, the median pore diameter was 0.0048 ${\mu}{\textrm}{m}$, and the particle size of SiO$_2$-B$_2$O$_3$ membrane was 7 nm. The separation properties of the gas mixture ($H_2$/$N_2$) through the SiO$_2$-B$_2$O$_3$ membrane was studied as a function of pressure. The real separation factor($\alpha$) of SiO$_2$-B$_2$O$_3$ membrane for $H_2$/$N_2$ gas mixture was 4.68 at 155.15 cmHg and $25^{\circ}C$. The real separation factor($\alpha$), head separation factor($\beta$) and tail separation factor((equation omitted)) were increased as the pressure of permeation cell increased.

졸겔법에 의해 Si(OC$_2$$H_5$/)$_4$-($CH_3$O)$_3$B-C$_2$$H_5$OH-$H_2O$계로부터 다공성의 SiO$_2$-B$_2$O$_3$ 막을 제조하였다. SiO$_2$-B$_2$O$_3$막의 특성을 BET, IR spectrophotometer, X-ray diffractometer, SEM 과 TEM을 사용하여 조사하였다. $700^{\circ}C$에서 얻어진 SiO$_2$-B$_2$O$_3$ 막의 평균 기공직경은 0.0048 $\mu\textrm{m}$이고, 표면적은 354.398 $m^2$/g이었으며, 입자의 크기는 7 nm인 무정형의 다공체이었다. SiO$_2$-B$_2$O$_3$ 막의 수소/질소 혼합 기체 분리 특성은 기체분리 압력을 달리하여 조사하였다. $25^{\circ}C$, ΔP 155.15cmHg에서 수소/질소 혼합 기체를 분리하여 본 결과 SiO$_2$-B$_2$O$_3$ 막의 수소에 대한 real separation factor($\alpha$)는 4.68이었다. 그리고 투과셀의 압력차(ΔP)값이 증가할수록 real separation factor($\alpha$), head separation factor($\beta$), tail separation factor((equation omitted))값이 증가하였다.

Keywords

References

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