Use of V2O5/Ti-PILC catalyst for the reduction of NO by NH3
SCIE
SCOPUS
- Title
- Use of V2O5/Ti-PILC catalyst for the reduction of NO by NH3
- Authors
- Chae, KJ; Nam, IS; Yang, HS; Song, SL; Do Hur, I
- Date Issued
- 2001-02
- Publisher
- SOC CHEMICAL ENG JAPAN
- Abstract
- Titania-pillared interlayer clays (Ti-PILCs) exhibited peculiar physicochemical characteristics as catalyst supports compared to that of titania for the reduction of NO by NH3. Korean natural bentonite (KNB) was employed as a basic component of PILC due to its high pillaring capacity. For the freeze-dried Ti-PILC, the development of needle-like crystallites revealing the formation of a "house-of-cards" structure by delamination of long-ranged layered structure of Ti-PILC has been observed. Freeze-drying creates a unique pore structure of Ti-PILC catalyst such as multi-modal pore size distribution simultaneously containing micropores and meso- or macropores in the pore network. In particular, V2O5/Ti-PILC catalyst exhibits high performance of NO removal by NH3 mainly due to the strong catalyst surface acidity and redox properties examined by NH3 TPD and TPR-TPO studies, respectively. Without the addition of the catalyst promoter, WO3 and MoO3 to the catalyst, V2O5/Ti-PILC catalyst shows competitive NO removal activity to a commercial one.
- Keywords
- PILC; vanadia; selective catalytic reduction; freeze-drying; TEM; MORDENITE; DEACTIVATION; CLAY
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/19661
- DOI
- 10.1252/jcej.34.148
- ISSN
- 0021-9592
- Article Type
- Article
- Citation
- JOURNAL OF CHEMICAL ENGINEERING OF JAPAN, vol. 34, no. 2, page. 148 - 153, 2001-02
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