Load-type foamed aluminum catalyst for removing dimethyl formamide by use of supercritical water oxidization

Abstract

The invention discloses a load-type foamed aluminum catalyst for removing dimethyl formamide by use of supercritical water oxidization. The load-type foamed aluminum catalyst for removing dimethyl formamide by use of supercritical water oxidization is prepared by virtue of the following steps: washing foamed aluminum, and then modifying the washed foamed aluminum with AgNO3, thereby obtaining a substance M; modifying a mixed solution prepared from polyvinyl pyrrolidone, methanol, gold trichloride, concentrated hydrochloric acid and sodium borohydride by the substance M, thereby obtaining a substance N; modifying a mixed solution prepared from SrCl2, CoCl2, concentrated aqua fortis, urea and ammonium fluoride by the substance N, thereby obtaining a substance O; modifying a mixed solution prepared from tetra-n-butyl titanate, tetraethyl orthosilicate and acetylacetone by the substance O, thereby obtaining a substance P; modifying a mixed solution prepared from ZrCl4, MgCl2 and InCl3 by the substance P, thereby obtaining a substance Q; and modifying a mixed solution prepared from PbCl2, BiCl3, NaOH, Na2CO3 and CdCl2 by the substance Q, thereby obtaining a substance, namely the load-type foamed aluminum catalyst for removing the dimethyl formamide by use of supercritical water oxidization.

Description

technical field [0001] The invention belongs to the technical field of supercritical water oxidation for refractory organic wastewater treatment, and in particular relates to a supported foamed aluminum catalyst used for supercritical water oxidation to remove dimethylformamide. Background technique [0002] Supercritical water oxidation is a wastewater treatment technology developed in the 1980s. It mainly uses molecular oxygen or hydrogen peroxide as an oxidant and supercritical water as a solvent to oxidize and decompose organic pollutants. In the oxidation process, due to the good solubility of supercritical water to various organic substances and oxygen, organic substances, oxidants and supercritical water form a homogeneous phase, the reaction will not be hindered by the mass transfer between the phases, and the reaction rate can be greatly increased. The reaction temperature of supercritical water oxidation treatment technology is generally 400-600°C, and the pressure...

AI Technical Summary

Problems solved by technology

The catalyst commonly used in catalytic supercritical water oxidation technology is MnO 2 , CuO, TiO 2 , CeO 2 、Al 2 o 3 , Pt or a composite catalyst composed of several of them such as Cr 2 o 3 / Al 2 o 3 , CuO / A1 2 o 3 , MnO 2 / CeO 2 However, these catalysts have disadvantages such as poor stability and low catalytic activity, which limit the application and development of catalytic supercritical water oxidation technology in water treatment, so the research and preparation of new catalytic materials need to be further strengthened, especially However, there is still a lack of catalysts for supercritical water oxidation to remove dimethylformamide