Effect of Preparation Method on NH3-SCR Activity of Cu-LTA Catalysts
SCIE
SCOPUS
- Title
- Effect of Preparation Method on NH3-SCR Activity of Cu-LTA Catalysts
- Authors
- Lin, Jinhan; Lee, Kyounghwan; Hong, Suk Bong
- Date Issued
- 2021-09
- Publisher
- Elsevier BV
- Abstract
- The preparation method effect on the catalytic properties and hydrothermal stability of copper-loaded LTA (Cu-LTA) zeolites for the selective catalytic reduction of NOx with NH3 (NH3-SCR) has been investigated. Copper nitrate and liquid-state ion exchange (IE) was found to be the best for maximizing the SCR performance of Cu-LTA among the Cu sources and loading methods studied here. When fresh, the low-temperature (≤ 400 °C) activity of Cu-LTA prepared in this way, denoted Cu-LTA(n)IE, is lower than that of the catalyst prepared using copper acetate via ion exchange. After hydrothermal aging at 900 °C for 24 h, however, Cu-LTA(n)IE shows a higher deNOx activity in the studied temperature range than any other catalysts. The overall characterization results show that the excellent hydrothermal durability of Cu-LTA(n)IE resulted from the stability of [2Z-Cu] species generated by locating Cu2+ ions onto Al pairs in the LTA framework.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/105212
- DOI
- 10.1016/j.cattod.2020.08.030
- ISSN
- 0920-5861
- Article Type
- Article
- Citation
- CATALYSIS TODAY, vol. 376, page. 41 - 46, 2021-09
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- There are no files associated with this item.
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