Abstract
Manganese (Mn) catalysts were generated using CeO2 and ZrO2 supports synthesized by the supercritical hydrothermal method and two different Mn precursors, aimed at an application for a low-temperature selective catalytic reduction process. Manganese acetate (MA) and manganese nitrate (MA) were used as Mn precursors. Effects of the kind and the concentration of the Mn precursor used for catalyst generation on the NOx removal efficiency were investigated. The characteristics of the generated catalysts were analyzed using N2 adsorption-desorption, thermo-gravimetric analysis, X-ray diffraction, and X-ray photoelectron spectroscopy. De-NOx experiments were carried out to measure NOx removal efficiencies of the catalysts. NOx removal efficiencies of the catalysts generated using MA were superior to those of the catalysts generated using MN at every temperature tested. Analyses of the catalyst characteristics indicated that the higher NOx removal efficiencies of the MA-derived catalysts stemmed from the higher oxygen mobility and the stronger interaction with support material of Mn2O3 produced from MA than those of MnO2 produced from MN.
| Original language | English |
|---|---|
| Pages (from-to) | 105-111 |
| Number of pages | 7 |
| Journal | Applied Chemistry for Engineering |
| Volume | 23 |
| Issue number | 1 |
| State | Published - 2012 |
Keywords
- Hydrothermal synthesis in supercritical water
- SCR