Structure of Mn–Zr mixed oxides catalysts and their catalytic performance in the gas-phase oxidation of chlorocarbons

Catalytic abatement of trichloroethylene over Mo and/or W-based bronzes

“…In this way, Zhou et al [30] studied the activity of Ce 2 O/USY catalyst for 1,2-dichloroethane (DCE) oxidation and found that the synergy between acidity and redox sites results in a higher activity. Similar results were found by Gutiérrez-Ortiz et al [50] who showed that Mn-Zr mixed oxides with surface acidity combined with readily accessible active oxygen species offered higher activity for the oxidation of DCE and TCE. Previously a similar effect was found by same authors [51] for the Ce-Zr mixed oxides.…”

EFFECT OF COOPER ON THE CATALYTIC ACTIVITY FOR ACETYLACETATE COMBUSTION OF Ca1-x Cu xZrO3 AND Sr1-xCu xZrO3 PEROVSKITE-TYPE OXIDES

“…The single and well-defined reduction peak at 230°C is attributed to the reduction of well dispersed CuO phase and the wider second reduction peak to a more crystalline CuO phase [26,27]. The TPR of the Sr series show almost no reducibility at lower copper content (xCu≤0.1).…”

Catalysis in VOC Abatement

“…On the other hand, selectivity values to CO 2 were close to 100%. Similarly to Ce-Zr mixed oxides, according to Gutiérrez-Ortiz et al [102], acid sites play a key role in controlling the decomposition of chlorinated compounds over acidic catalysts since they act as effective chemisorption sites for such compounds. Accordingly, it was suggested that the first stage of the oxidation process is the adsorption of the chlorinated molecule on an acid site, which subsequently can be attacked by mobile oxygen species from the Mn-Zr mixed oxides through the Marsvan Krevelen mechanism.…”

“…Gutiérrez-Ortiz et al [102] reported that the incorporation of small amounts of zirconium in a MnO x catalyst can improve its catalytic performance in oxidation of CVOCs. They investigated DCE and TCE oxidation over a set of several Mn-Zr mixed oxides, ZrO 2 and Mn 2 O 3 .…”

“…In general, independently on the catalyst used, the catalytic destruction of chloroalkenes is more difficult than that of chloroalkanes due to higher bond energy of C-Cl in chloroalkenes [57,[99][100][101][102][103].…”