Loaded type foam aluminum catalyst for removing acrylonitrile through supercritical water oxidation

Abstract

The invention discloses a loaded type foam aluminum catalyst for removing acrylonitrile through supercritical water oxidation. Foam aluminum is cleaned, is then prepared into a substance M through AgNO3 modification; the substance M is prepared into a substance N through the modification on a mixed solution prepared from polyvinylpyrrolidone, methyl alcohol, gold chloride, concentrated hydrochloric acid and sodium borohydride; the substance N is prepared into a substance O through the modification on a mixed solution prepared from CoCl2, CuCl2, concentrated nitric acid, urea and ammonium fluoride; the substance O is prepared into a substance P through the modification on a mixed solution prepared from tetra-n-butyl titanate, tetraethoxysilane and acetylacetone; the substance P is prepared into a subsequent Q through the modification on a mixed solution prepared from SnCl4, PbCl2 and CeCl3; the subsequent Q is prepared into a substance through the modification on a mixed solution prepared from SrCl2, InCl3, NaOH, Na2CO3 and NiCl2, and the substance is the loaded type foam aluminum catalyst for removing acrylonitrile through supercritical water oxidation.

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 acrylonitrile. 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 is ...

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 acrylonitrile