Novel CeZrTiAl catalyst for NH3-SCR of NOx based on Ti-bearing BFS. Issue 3 (June 2021)

• Record Type: Journal Article
• Authors: Gong, Pijun; Xie, Junlin; Wu, Haitao; Zhang, Yuping; Cheng, Xiangkui
• Is Part Of: Journal of environmental chemical engineering. Volume 9:Issue 3(2021)
• Publication Date: 2021-06
• Subjects: Ti-bearing BFS -- Nanosheet γ-Al2O3 -- NH3-SCR -- CeZrTiAl; Chemical engineering -- Environmental aspects -- Periodicals; Environmental engineering -- Periodicals; Chemical engineering -- Environmental aspects; Environmental engineering; Periodicals; 660.0286
• DOI: 10.1016/j.jece.2021.105233
• Languages: English
• ISSNs: 2213-2929

Abstract

Abstract: In this paper, an excellent NH3 -SCR activity CeZrTiAl catalyst with γ-Al2 O3 nanosheets structure was prepared based on Ti-bearing BFS, which presented more than 90% NOx conversion between 260 and 440 °C. The good denitrification activity result from the γ-Al2 O3 nanosheets acted as a framework, which makes active components disperse in an amorphous form and also induces a larger surface area. Meanwhile, the interaction between γ-Al2 O3 nanosheets and CeO2 can lead to good reduction abilities and more acidic sites by increasing the content of Ce 3+ and oxygen vacancies. The key to obtaining a highly active CeZrTiAl catalyst with nanosheets γ-Al2 O3 is to convert Al into sulfate and then control the pH to form an important γ-AlOOH precursor. This established approach can be expanded to the controlled synthesis and stabilization of other Ti-bearing BFS catalysts with wide applications. Graphical Abstract: ga1 An excellent activity CeZrTiAl catalyst was prepared based on Ti-bearing BFS, which presented more than 90% NOx conversion between 260 and 440 °C. The formed of γ-AlOOH under hydrothermal condition is an important precursor to prepare Ti-bearing BFS catalyst with nanosheets γ-Al2 O3 . Highlights: CeZrTiAl catalyst with nanosheets γ-Al2 O3 based on Ti-bearing BFS presents an excellent catalytic activity (above 90%) at 260–440 °C. γ-Al2 O3 nanosheet affect the specific surface area, reduction abilities and surface acidic sites of CeZrTiAl by forming a framework.