Synthesis Process of Catalyst Activated Carbon Composites for Dioxin Decomposition

Abstract

The invention discloses a synthesis process of a catalytic activated carbon composite material for decomposing dioxins, comprising the following steps: A, pulverizing the activated carbon and sieving to obtain product A; B, putting product A into a container filled with concentrated sulfuric acid In the process, nitrogen gas is introduced into the bottom of the container, soaked, washed, and dried to obtain product B; C, take product B and metal salt, add alcohol and deionized water, and stir to obtain product C; D, add complexing agent to product C , ultrasonic infiltration, stirring, adjusting pH, and stirring until it is in a sol state, to obtain product D; E, drying product D into a gel to obtain product E; F, under the protection of hydrogen, sintering product E to obtain product F; G. Remove impurities from product F, wash and dry to obtain a finished product. In the present invention, the specific surface area of ​​the modified activated carbon increases, the catalyst is evenly distributed in the activated carbon, the finished product is not easy to form pores and cracks, the structure of the catalyst and the activated carbon is dense, the removal rate of the finished product to dioxin is high and stable, and the finished product Increased service life.

Description

technical field [0001] The invention relates to the technical field of catalyst composite materials for decomposing dioxins, in particular to a synthesis process of catalyst activated carbon composite materials for decomposing dioxins. Background technique [0002] On May 22, 2001, representatives from more than 90 countries and regions, including China, signed the "Stockholm Convention on Persistent Organic Pollutants" in Stockholm, the capital of Sweden. The Stockholm Convention aims to reduce and eliminate pollutants in the environment. To protect human health and the environment from the hazards of persistent organic pollutants, the first batch of 12 persistent organic pollutants represented by polyazine biphenyls and dioxins have become the key targets of global chemical pollution control . my country is the first batch of signatories to the Stockholm Convention, which came into effect on November 11, 2004. According to the requirements of the Convention, my country c...

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Problems solved by technology

In the preparation process of the existing catalyst-activated carbon composite material, the specific surface area of ​​the modified activated carbon is not large enough, and the catalyst is unevenly dispersed in the activated carbon during the sol-gel reaction, and it is easy to form agglomerates, and it is easy to crack when dried, so that the performance of the finished product is not good. Even, the removal rate of organic pollutants is not high enough and unstable, and the service life of the finished product is shortened; the connection between the catalyst and the activated carbon is not tight enough during the sol-gel reaction, and pores are easily formed in the finished product made by sintering, which shortens the service life of the finished product; When the glue is sintered, the temperature rise rate is not properly controlled, and the small pores in the sol cannot be eliminated well, so that the sintered product is not dense enough, easy to crack, and shortens the service life of the finished product

Therefore, the preparation of the existing catalyst-activated carbon composite material, the specific surface area of ​​the activated carbon after modification is not large enough, the catalyst is unevenly distributed in the activated carbon, the finished product is easy to form fine pores and cracks, and the structure of the catalyst and the activated carbon is not compact enough, so that the finished product is harmful to organic matter. The removal rate of pollutants is not high enough and unstable, and the service life of the finished product is short

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