| 학회 | 한국화학공학회 |
| 학술대회 | 2014년 가을 (10/22 ~ 10/24, 대전 DCC) |
| 권호 | 20권 2호, p.2131 |
| 발표분야 | 촉매 및 반응공학 |
| 제목 | Synthesis of CHA type zeolite with higher Si/Al2 ratio in the absence of organic structure-directing agent |
| 초록 | Chabazite (CHA) type zeolite has 3-dimensional channel system with relatively small pore (0.38 nm) and large cavity. Recently, copper-exchanged CHA-type zeolite catalyst is found to be promising catalysts for selective catalytic reduction by ammonia (NH3-SCR) reaction due to its exceptional hydrothermal stability. To have this property, high content of silica in zeolite is crucial. CHA-type aluminosilicate with high Si/Al2 ratio (~12) is typically synthesized by using organic structure-directing agent (OSDA). However, the use of OSDA is cost-ineffective and produce environmentally harmful chemicals during calcination. Chabazite synthesized by using inorganic structure-directing agent has low Si/Al2 ratio (~5) In this study, OSDA-free CHA-type zeolite with relatively high Si/Al2 ratio is synthesized in the presence of zeolite Y and fluoride ion. Effect of synthesis time, KF concentration and Si/Al2 ratio in the gel was discovered on the synthesis of chabazite. Physicochemical properties of the prepared zeolite were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and inductively coupled plasma atomic emission spectrometry (ICP-AES). |
| 저자 | 김종현, 김도희 |
| 소속 | 서울대 |
| 키워드 | Zeolite; Organic structure directing agent; Chabazite; Fluoride ion |
| 원문파일 | 초록 보기 |
