실리카 증착 HY 제올라이트의 특성 조사 = Properties of Silica-deposited HY Zeolites

다국어 초록 (Multilingual Abstract)

The modification of HY zeolite (SiO₂/Al₂O₃=5.6 or 40.4) was carried out by a method of chemical vapor deposition of silicon alkoxide, e.g., Si(OCH₃)₄or Si(OCH₃)₂(CH₃)₂. The parent and silica-deposited HY zeolites were characterized by N₂or 1,3,5-triisopropylbenzene adsorption measurement. The control of pore-opening size is affected by the Al concentration of HY zeolite. The pore-opening of HY zeolite (SiO₂/Al₂O₃=5.6) was completely closed by the deposition of large amount of silica. On the other hand, the pore-opening size of HY zeolite (SiO₂/Al₂O₃=40.4) can be narrowed by the deposition of silica. We thus obtained the HY (SiO₂/Al₂O₃=40.4) zeolites with the different pore-opening sizes.