Volatile organic compounds (VOCs) are considered as one of the main air pollutants, and legislation has already been introduced in many countries to reduce their emissions. In addition to the main emission sources, such as petroleum industries, there are also many local sources, such as painting, printing and laundering etc., which emit low concentrations of VOC. A modified adsorption system (MAS) has been suggested for the control low concentrations and high flow rate streams of VOC. The MAS was based on adsorption, followed by the treatment of concentrated VOC, such as incineration (catalytic or thermal) or recovery. In this paper, the results of the adsorption/desorption of toluene (target VOC) over several adsorbents (activated carbon, hydrophobic zeolites and mesoporous materials) were reviewed for the selection of a good VOC adsorbent for the MAS. From the results, zeolite HY, with a FAU structure, was selected as the most potential adsorbent for the MAS.

리트벨트 분석법과 저온에서 측정한 방사광 가속기 분말회절 자료를 이용하여 CFC-13 (CF3Cl; chlorotrifluoromethane) 분자체가 흡착된 제올라이트 Na,K-LSX (low-silica X or synthetic faujasite)의 구조분석을 수행하였으며, supercage 내의 6-ring주변에 CFC-13 분자체의 불소 원자와 LSX 제올라이트의 나트륨 양이온 간의 결합이 일어남을 확인하였다.