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Carbon nanotubes as base materials for water treatment processes

Catalysts based in cerium oxide for wet oxidation of acrylic acid in the preven...

Acrylic acid is a refractory compound for the non-catalytic wet oxidation (WO) process and can seriously damage the environment when released in industrial effluents. Oxidation of acrylic acid by catalytic wet oxidation (CWO) was studied in slurry conditions in a high-pressure batch reactor at 200 °C and 15 bar of oxygen partial pressure. Several solid cerium-based catalysts prepared in our laboratory were used...

Catalytic studies in wet oxidation of effluents from formaldehyde industry

Development and design of active catalysts for the oxidation of formaldehyde present in wastewaters is of great importance. In this context, catalytic performance studies for oxidation of high formaldehyde containing solutions (1500 ppm) were carried out in a semibatch high-pressure reactor at 190-220°C and 15-35 bar of oxygen partial pressure. The removal efficiency of total organic carbon (TOC) was evaluated ...

Catalytic and Noncatalytic Wet Oxidation of Formaldehyde. A Novel Kinetic Model

Formaldehyde is a carcinogen compound and one of the most important pollutants contained in wastewaters. Three different treatments were evaluated in a high-pressure batch reactor for the total organic carbon (TOC) degradation of formaldehyde solutions: thermolysis, noncatalytic wet oxidation, and catalytic wet oxidation over a CuO−ZnO/Al2O3 catalyst. The absence of the catalyst leads to a predominant inductio...