The synthesis of Cu/SAPO-34 catalysts and evaluation ability of NOx treatment by NH3-SCR with Cu/ZSM-5 catalyst using commercial ZSM-5 as support

Autor: Huyen Pham Thanh, Huyen Vuong Thanh, Tuan Doan Anh, Khanh Dinh Van, Le Nguyen Hong
Rok vydání: 2020
Předmět:
Zdroj: Vietnam Journal of Catalysis and Adsorption. 9:34-41
ISSN: 0866-7411
DOI: 10.51316/jca.2020.026
Popis: SAPO-34 molecular sieves were synthesized under hydrothermal conditions using different combinations of tetraethyl ammonium hydroxide (TEAOH), morpholine (Mor), and triethylamine (TEA) as organic structure-directing agents and economical silicon source by colloidal silica LUDOX AS-30. The products were characterized by X-ray diffraction, Field Emission Scanning Electron Microscopes, Energy-dispersive X-ray spectroscopy, NH3 temperature - programmed desorption, N2 adsorption-desorption. Electron paramagnetic resonance technique was applied to identify isolated Cu2+ ions in the framework. Although materials with the same chabazite framework structure are obtained, they possess different physicochemical properties, especially crystal size and acidity. Catalytic performances of Cu/SAPO-34 and Cu/ZSM-5 using commercial ZSM-5 as support with the loading of 3 wt% prepared by liquid ion-exchange method was performed for selective catalytic reduction (SCR) of NOx with NH3.
Databáze: OpenAIRE