In this work, uniform and nanosize(75nm) silicalite-1 crystals was hydrothermally synthesized by using 9TPAOH:0.16NaOH:25Si:495H2O solution at 80 ℃. They were applied as seed in the secondary growth process for preparing silicalite-1 membrane by template-free method. And silicalite-1 membrane, which was coated by nano-size seed, showed a high EtOH/H2O separation factor of 128. The high separation factor could be explained by the role of nanosize seed. The application of nanosize seed successfully retarded the formation of interfacial voids between silicalite-1 grains. Therefore, it could be concluded that template-free hydrothermal process can produce silicalite-1 membrane with well performance.

• 후시구이(충남대학교 에너지과학기술대학원 에너지과학기술학과) | Sigui Hu
• 한문희(충남대학교 에너지과학기술대학원 에너지과학기술학과) | Moon-Hee Han
• 조철희(충남대학교 에너지과학기술대학원 에너지과학기술학과) | Churl-Hee Cho