High activity wet oxidation catalyst with carbon material as carrier and its preparation method

Abstract

The invention provides a high-activity wet-oxidation catalyst using carbon as carrier as well as its preparing method. It contains one of the noble metals: Pt, Pd, Ru, Ir Rh and Au, uses carbon as carrier and has the weight percents of component: noble metal 0.25-0.5% and the rest carbon, where the carbon surface area is 80-1500 sq m / g. It can heighten dipersivity and utilization ratio of noble metal and at the same time has stronger ability to absorb organic matters and dissolved oxygen, very adaptive to catalysis and its content of noble metal is only 1 / 4-1 / 8 of Japanese similar catalysts and its catalyzing activity is 15-75% higher than the Japanese similar catalysts'. It can largely reduce processing cost and is an effective way to extend the application of wet catalytic oxidizing technique in processing waste water.

Description

Technical field [0001] The invention relates to a wet catalytic oxidation catalyst using precious metals as active components and a preparation method thereof. The catalyst is particularly suitable for treating high-concentration organic wastewater that is difficult to degrade. Background technique [0002] In the treatment of high-concentration refractory organic wastewater technology, the more advanced is the wet catalytic oxidation technology (CWOP). In this technology, in the presence of a catalyst, air or oxygen is introduced, and the organic wastewater is purified under certain temperature and pressure conditions, so that the C, H, O, and N in the wastewater are respectively CO 2 , H 2 O and N 2 There is no secondary pollution. The core part of this technology is the catalyst. But most of the current catalysts are TiO 2 , ZrO 2 Or their composite oxides or porous metal materials such as high-nickel alloys are used as carriers, and iron, cobalt, nickel, ruthenium, rhodium, p...

AI Technical Summary

Problems solved by technology

However, most of the current catalysts use TiO 2 , ZrO 2 or their composite oxides or high-nickel alloys and other porous metal materials as carriers, iron, cobalt, nickel, ruthenium, rhodium, palladium, iridium, platinum, copper, gold and tungsten and at least one insoluble or poorly soluble in water Metal compounds are deposited on the above-mentioned carrier, as disclosed in Chinese patent CN1121322A "Catalyst for wastewater treatment and its manufacturing method and method for treating wastewater using the catalyst" and CN1084496A disclosed "Containing high concentrations of organic matter and ammonia industrial sewage wet oxidation purification catalyst and preparation method”, they all use more noble metals as active components, not only is it difficult to reduce the cost of the catalyst, but also TiO 2 , ZrO 2 Such supports are matched with noble metals, and their catalytic activity is not ideal