Catalytic Wet Oxidation of Pharmaceutical Sludge by Molecular Sieve Loaded with Cu/Ce

Abstract

Abstract:In the present study, the catalytic wet oxidation of pharmaceutical sludge by molecular sieve loaded with Cu/Ce as catalyst was investigated. Experiments were performed in an experimental batch reactor. Reaction parameters including catalyst dose, temperature, time, and oxygen pressure were discussed. The results showed that the catalysts prepared by co-precipitating method have good catalytic performance. Under optimum conditions, the highest volatile suspended solids (VSS) removal rate approximately 92% and chemical oxygen demand (COD) removal rate of 75% were obtained at 260 • C for 60 min with initial oxygen pressure 1.0 MPa and the catalyst 10 g/L. These results implied that the catalytic wet oxidation of pharmaceutical sludge by molecular sieve loaded with Cu/Ce is a promising method for the highly efficient degradation of the sludge.

Wet oxidation and catalytic wet oxidation of pharmaceutical sludge

“…In our previous study, we also investigated several catalysts for the wet oxidation of pharmaceutical sludge and wastewater. We found that the prepared Cu–Ce/γ-Al 2 O 3 catalyst has good performance 28 – 30 . The catalyst was synthesized by a typical wet impregnation procedure.…”

Recent advances in techniques for fabrication and characterization of nanogap biosensors: A review

“…However, the wet oxidation method cannot produce uniform structures and thus not suitable for the fabrication of good quality nanogap structures. A typical example of a schematic diagram of the wet oxidation process is shown in Figure 10 124 …”

“…The wet oxidation process is a process where a thin oxidation layer can be introduced to semiconductor surfaces such as silicon and normally water vapor is introduced into the heated oxidation tube. 124 In most semiconductor industries, this process grows the oxide layer where the growth rate of oxide is 1000-1200 Ǻ/h. It is simple and easy to do especially when dealing with silicon and siliconrelated materials.…”

Effect of Mg2+ additives on Nieuwland catalyst: The role of the second metal ionic radius

“…Previously, we have reported the addition of second metal would significantly increase the selectivity of the catalyst toward the target product but the low C 2 H 2 conversion, such as SrCl 2 and ZnCl 2 [22,23] ; however, the reaction mechanism and deactivation principle have not been mentioned. Combined with other related reports, [24][25][26] we start with magnesium metal additives to reveal the role of the second metal in the dimerization of acetylene and the possible reaction mechanism. In the Nieuwland catalytic system, the addition of magnesium as a second metal will significantly increase the acetylene conversion rate and the selectivity toward vinyl acetylene.…”