One-pot synthesis of highly dispersed mesoporous Cu/ZrO2 catalysts for NH3-SCR
| Autor: | Rob Jeremiah G. Nuguid, Davide Ferri, Ole Håvik Bjørkedal, Magnus Rønning, Per Erik Vullum, Oliver Kröcher, Samuel K. Regli |
|---|---|
| Rok vydání: | 2022 |
| Předmět: |
acid sites
Copper oxide Materials science Diffuse reflectance infrared fourier transform cu-cha nitric-oxide chemistry.chemical_element reduction 02 engineering and technology 010402 general chemistry 01 natural sciences Catalysis no chemistry.chemical_compound Adsorption one-pot synthesis sol-gel mixed oxides high dispersion crystal-structure Selective catalytic reduction General Chemistry 021001 nanoscience & nanotechnology Copper 0104 chemical sciences nitrogen-oxides chemistry adsorption nh3 nh3-scr 0210 nano-technology Dispersion (chemistry) Mesoporous material cu/zro2 Nuclear chemistry |
| Zdroj: | Catalysis Today |
| ISSN: | 0920-5861 |
| Popis: | Catalysts consisting of highly dispersed copper on a mesoporous ZrO2 support were synthesised via a one-pot sol-gel synthesis and were tested for the selective catalytic reduction of NOx by NH3. The copper dispersion was investigated by XRD and TEM, which showed no discernible copper oxide particles up to 6 wt% Cu, while they were detected at 15 wt% Cu. NH3 adsorption and the SCR reaction were followed in situ by diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) on mesoporous ZrO2 and on one-pot synthesized 3 wt% Cu/ZrO2. Cu was found to improve the NH3 adsorption capacity of the catalyst by enhancing the Lewis functionality. The catalysts were efficient for SCR at low temperature, at 150 degrees C 75% of NO was converted over 6 wt% Cu/ ZrO2 at water-free conditions. Increasing the copper loading while maintaining the dispersion improved NOx conversion. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect