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

Abstract

The enhanced activity has been related to the remarkable higher surface area of the catalyst and to the catalyst composition which influences the acid characteristics as well as the reducibility and reoxidation of the catalysts. The importance of the oxygen dissociation on the catalyst surface and the diffusion of oxygen species through the catalyst are also discussed.

Catalytic oxidation of 1,2-dichloroethane over three-dimensional ordered meso-macroporous Co3O4/La0.7Sr0.3Fe0.5Co0.5O3: Destruction route and mechanism

“…Schematic illustration for the preparation of three-dimensional ordered meso-macroporous catalyst. materials for CVOCs removal [13][14][15][16]. However, the inferior low-temperature activity and chlorine resistant of conventional transitional metal oxides is an enormous obstacle for their practical applications.…”

The oxidation of trichloroethylene over different mixed oxides derived from hydrotalcites

“…As it can be seen, the catalyst was stable at this temperature and there was not a significant deactivation after 70 hours of reaction. These results indicate that Co-containing mixed oxides based on hydrotalcite-like compounds are highly active and stable catalysts for the TCE oxidation, being these results better than those obtained with an acid zeolite or with other type of catalysts based on bronzes or on Cu hydrotalcites [15,17].…”

“…Metal oxides [5][6][7][8] or supported noble metals [9,12] have been the most common catalysts used in this reaction, but they have some drawbacks as the poisoning by chlorine [4] and the formation of chlorinated by-products that can be very toxic [7,13]. Recently, other materials have been used for the catalytic oxidation of CVOCs as zeolites [12,14] and bronzes [15], but it is still necessary to find more active and stable…”

Gaseous cyclohexanone catalytic oxidation by a self-assembled Pt/γ-Al2O3catalyst: process optimization, mechanistic study, and kinetic analysis

“…Three types of catalysts are used widely for VOC oxidation, namely precious metals, transition metal oxides, and zeolites, and most studies have focused on the relationship between their structural characteristics and performances. [10][11][12][13] Process parameters, such as target concentration, space velocity, and temperature, are mostly considered for the evaluation of the prepared catalysts. According to the previous studies, more attention should be paid to aromatics, chlorinated VOCs, and alkanes because aromatics (like benzene and toluene) are emitted mostly by industry, and chlorinated VOCs are toxic to catalysts (mainly because of the formation of highly chlorinated by-products), which affects its usage time, while alkanes are not oxidized efficiently by other methods (such as bio-oxidation and photo-oxidation).…”