Catalyst for eliminating chlorine-containing volatile organic compounds by low-temperature catalytic combustion

Abstract

The invention discloses a catalyst for eliminating chlorine-containing volatile organic compounds by low-temperature catalytic combustion. The catalyst mainly comprises a transition metal oxide-cerium oxide composite oxide carrier and ruthenium oxide loaded by the carrier, wherein a transition metal element is of Ti, Mn, Co, Fe, Cu and Ni. Air which is taken as an oxidant is brought into a reactor so as to transform the chlorine-containing volatile organic compounds to carbon dioxide, hydrogen chloride and chlorine, and full combustion tail gas can be absorbed by a dilute alkaline solution (hydrogen chloride / chlorine and other acidic gas) and then exhausted. The catalyst has the advantages of high catalytic activity, strong anti-chlorine poisoning capability and long service life of the catalyst, and is particularly suitable for eliminating the chlorine-containing organic compounds by low-temperature catalytic combustion.

Description

technical field [0001] The invention belongs to the technical field of environmental protection by catalytic combustion of volatile organic compounds, and in particular relates to a ruthenium oxide / transition metal oxide-cerium oxide catalyst for low-temperature catalytic combustion elimination of chlorine-containing volatile organic compounds and a preparation method thereof, and Provided is a method for completely catalytic combustion to eliminate chlorine-containing volatile organic pollutants in the environment. Background technique [0002] Chlorine-containing volatile organic compounds can not only cause serious harm to human health, but also cause lasting and cumulative effects on biological systems, and can destroy the atmospheric ozone layer. The 12 top persistent organic pollutants listed in the United Nations Environment Program International Treaty are all chlorine-containing organic compounds. Chlorine-containing volatile hydrocarbons are divided into chlorinat...

AI Technical Summary

Problems solved by technology

[0005] Generally speaking, in the catalytic combustion of chlorine-containing organic compounds, noble metal catalysts are relatively expensive, have high chlorination reaction activity (prone to produce more toxic polychlorinated by-products), are easy to generate oxychlorine compounds and are poisoned, and are often used in high-temperature areas. It is easy to cause problems such as deactivation due to the loss of noble metals, which limits the application of noble metal catalysts

In recent years, catalysts for the catalytic combustion of chlorine-containing organic compounds have mainly focused on transition metal oxides and solid acid catalysts, but these catalysts have the disadvantage of low activity.

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