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Issue
Korean Chemical Engineering Research,
Vol.43, No.1, 66-70, 2005
폴리이미드의 탄화 처리에 의한 SiC 분리막의 가스투과 특성
Gas Permeation Characteristics of the Prepared SiC Membrane through Polyimide Carbonization Treatmemt
최호상, 황갑진, 강안수
IS 프로세스의 HI 분해 반응에서의 적용을 위해 고분자재료(폴리이미드)를 이용하여 탄화 막을 제작하고, 이 탄화막에 SiO를 처리함으로써 SiC 막을 제작하였다. 폴리이미드의 탄화에 의한 중량 감소는 약 50% 정도이고, 탄화 온도가 증가할수록 중량감소도 증가하였다. 탄화막은 탄화온도가 상승하면 가스 투과속도가 감소하고 막의 치밀화가 진행되었다. SiC 막은 SiO의 처리 농도가 증가하면 가스 투과 속도는 증가하고, 기체 투과 메커니즘은 활성화에너지 흐름에서 Knudsen 흐름으로 변화한다는 것을 알 수 있었다.
For the application in HI decomposition reaction of thermochemical water-splitting IS process, the carbonized membranes using the polymer material (polyimide) were prepared, and SiC membrane was also prepared by SiO treatment on those carbonized membranes. The weight change by the carbonation of polyimide was about 50%, and the weight decreased with an increase of carbonation temperature. The gas permeance (H2 or N2) of carbonized membrane decreased with an increase of carbonation temperature led to the pore closing. The gas permeance (H2 or N2) of SiC membrane increased with an increase of SiO treatment concentration, and the gas permeation mechanism was changed from the activiation energy flow to Knudsen flow.
Keywords: Thermochemical Water-Splitting; IS Process; SiC Membrane; Carbonized Membrane; Hydrogen Permselective Membrane
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