Effect of the preparation method on the catalytic properties of copper-containing zeolite Y applied for NH 3 -SCR-DeNO x

• Published in: Catalysis science & technology 2023-07, Vol.13 (13), p.3804-3817
• Main Authors: Suharbiansah, Rujito S. R., Lukman, Muhammad Fernadi, Nannuzzi, Chiara, Wach, Anna, Góra-Marek, Kinga, Liebau, Michael, Palčić, Ana, Pöppl, Andreas, Berlier, Gloria, Bordiga, Silvia, Gläser, Roger, Jabłońska, Magdalena
• Format: Article
• Language: English
• ISSN: 2044-4753; 2044-4761
• DOI: 10.1039/D3CY00269A

Two series of zeolite Y were prepared with varying particle sizes (estimated to be 100 or 400 nm) by applying different synthesis gel composition ratios as well as different ageing and hydrothermal steps. Copper-containing zeolite Y samples were obtained through ion-exchange, thoroughly characterized and tested for the selective catalytic reduction with NH 3 (NH 3 -SCR-DeNO x ). The catalytic activity of the prepared materials varied significantly due to the different nature of copper species. Results show that catalysts CuY-0h-A and CuY-24h-A (approx. particle sizes 2676 and 475 nm, respectively) facilitate a higher NO conversion both in the presence and absence of water vapor, exhibiting however stronger N 2 O formation above 250 °C. On the other hand, nearly X-ray amorphous Y-0h-B and Y-24h-B after ion-exchange led to decreased activity of CuY-0h-B and CuY-24h-B (approx. particles sizes 345 and 128 nm, respectively). Additional insight into the activity of the catalysts was obtained through in situ DR UV-vis spectroscopy.