Preparation method of three-dimensional ordered macroporous ferric oxide desulfurizer

Abstract

The invention relates to a preparation method of a three-dimensional ordered macroporous ferric oxide desulfurizer, which comprises the following steps: in view of the influence of the pore distribution of the desulfurizer on the desulfurization effect, preparing polystyrene microspheres by using ferric nitrate as the raw material, assembling an adhesive crystal template, and preparing the three-dimensional ordered macroporous ferric oxide desulfurizer. The preparation method has the advantages of short technological process, less equipment, full and accurate technological parameter data and high product purity (up to 96.9%). The pore size of the three-dimensional ordered macroporous ferric oxide desulfurizer is 90nm, the pores are orderly arranged, and the three-dimensional ordered macroporous ferric oxide desulfurizer has the advantages of favorable desulfurization effect and high desulfurization precision. The desulfurization effect of the three-dimensional ordered macroporous ferric oxide desulfurizer is enhanced by 91% as compared with the existing desulfurizer, thus, the preparation method is a very ideal method for preparing a ferric oxide desulfurizer.

Description

technical field [0001] The invention relates to a preparation method of a three-dimensional ordered macroporous iron oxide desulfurizer, belonging to the technical field of preparation and application of a three-dimensional ordered macroporous iron oxide desulfurizer. Background technique [0002] Coal gasification will generate coal gas, which inherits the composition of coal and also contains harmful substances such as hydrogen sulfide and carbonyl sulfide. How to remove sulfur-containing gases from coal gas is an important research topic. [0003] As the use of gas is becoming more and more extensive, the requirements for gas composition are getting higher and higher, and the requirements for sulfur index are getting higher and higher. For example, cycle power generation requires the sulfur concentration in gas to be below 100ppm. The concentration is below 1ppm, and the sulfur concentration of synthetic methanol is below 0.2ppm, which requires the removal of sulfide in t...

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Problems solved by technology

[0004] There are also many forms of gas removal methods, such as the use of metal oxides or their composites, such as zinc oxide, calcium oxide, iron oxide, ZnFe 2 o 4 , Zn 2 TiO 4 Among them, iron oxide desulfurizers are the first choice for gas desulfurizers due to their rich resources, relatively high sulfur capacity, and wide operating temperature range. However, traditional iron oxide desulfurizers usually have low activity and low desulfurization efficiency. The speed is small, and the utilization rate of desulfurizer is very low. It is mostly used for primary coarse desulfurization and needs to be used in conjunction with other desulfurizers.

[0005] Through in-depth research on the desulfurizer, it is found that the physical and structural parameters of the desulfurizer, especially the pore size range, seriously affect the mass transfer behavior of the gas in the particle, and then affect its sulfur capacity. In the case of desulfurizer active components Under the present circumstances, the structural parameters pore size and distribution determine the desulfurization performance of the desulfurizer, and the research on this aspect is still in the initial stage.

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