A kind of porous ceramsite Fenton catalyst and preparation method thereof
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A technology of porous ceramics and catalysts, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxides/metal hydroxide catalysts, etc., can solve problems such as inconvenient use, and achieve cheap prices and raw materials Simple, mechanically strong effect
Active Publication Date: 2018-10-12
HUNAN YONKER ENVIRONMENTAL PROTECTION RES INST +1
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Chinese patent CN201310000494.9 discloses "a preparation method of iron-loaded attapulgite heterogeneous Fenton catalyst", and the attapulgite is ground-acid activation-grinding-loading iron ions to prepare the catalyst for wastewater treatment. The removal rate of phenol in the medium reaches more than 95%, but the catalyst particles are 40-200 mesh, which is not very convenient to use
The pore size of 3A molecular sieve is 0.1nm, which is a microporous structure, which is not suitable for the treatment of wastewater containing macromolecular organic matter
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Embodiment 1
[0026] Take 2.4kg of sludge, 0.6kg of clay, 0.4kg of kaolin, 0.4kg of fly ash, 0.2kg of fumed silica, 0.1kg of copper oxide, and 0.1kg of iron oxide, and mix them well to form The ceramsite short columnar billet is heated in a high-temperature furnace at a temperature of 10°C to 500°C, pre-fired at a constant temperature for 20 minutes, then heated to 1100°C at a rate of 5°C / min, sintered for 20 minutes, and cooled to 300°C at a rate of 10°C / min Next, take it out and cool it naturally, the appearance of the porous ceramsite carrier is light brick red short columnar solid particles.
Embodiment 2
[0028]Take 2.0kg of sludge, 0.6kg of clay, 0.6kg of kaolin, 0.6kg of fly ash, 0.2kg of water glass, 0.15kg of copper chloride, and 0.2kg of ferrous sulfate and mix them well to form The ceramsite short columnar billet is heated in a high-temperature furnace at a temperature of 10°C to 500°C, pre-fired at a constant temperature for 20 minutes, then heated to 1100°C at a rate of 5°C / min, sintered for 20 minutes, and cooled to 300°C at a rate of 10°C / min Next, take it out and cool it naturally, the appearance of the porous ceramsite carrier is light brick red short columnar solid particles.
Embodiment 3
[0030] Take 2.4kg of sludge, 0.6kg of clay, 0.6kg of kaolin, 0.6kg of fly ash, 0.2kg of fumed silica, 0.1kg of copper sulfide, and 0.2kg of ferrous sulfate and mix them well to form The ceramsite short blank is heated in a high-temperature furnace at a temperature of 10°C to 500°C, pre-fired at a constant temperature for 20 minutes, then heated to 1150°C at a rate of 5°C / min, sintered for 15 minutes, and cooled to below 300°C at a rate of 10°C / min , Take out and cool naturally, the appearance of the porous ceramsite carrier is light brick red short columnar solid particles.
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Abstract
The invention discloses a porous ceramsite Fenton catalyst and a preparation method thereof. The method includes steps: (1) taking, by weight, 20-60 parts of civil sludge, 10-20 parts of clay, 10-20 parts of kaolin, 10-20 parts of coal ash, 2-5 parts of a silicon source, 2-5 parts of a copper compound and 2-5 parts of an iron compound as raw materials, well mixing the raw materials, and extruding to obtain a ceramsite blank material, wherein the silicon source is selected from one or more of sodium silicate, fumed silica and silicon powder; (2) subjecting the ceramsite blank material to drying, sintering and cooling to obtain a porous ceramsite carrier, wherein sintering particularly includes: heating the ceramsite blank material to 300-600 DEG C, keeping the temperature for 10-40min, reheating to 950-1150 DEG C, and keeping the temperature for 10-40min. By adoption of sludge for preparation of the porous ceramsite Fenton catalyst, simplicity of the raw materials, low cost, sludge reclamation and economic superiority are realized. In addition, the porous ceramsite Fenton catalyst with the rough surface and a great quantity of penetrating pores is high in particle porosity and specific surface area, stable in chemical property and adaptable to wastewater treatment in acid environments.
Description
technical field [0001] The invention relates to a porous ceramsite Fenton catalyst and a preparation method thereof. Background technique [0002] Porous ceramsite is a ceramsite body containing a large number of open pores, with high porosity, large specific surface area, and good adsorption capacity and activity. When it is used as a catalyst carrier, it can disperse and support the catalyst, thereby increasing the effective surface area of the catalyst, improving the conversion efficiency and reaction rate. The preparation of porous ceramsite as a catalyst mainly adopts the process of adding porogens, and there are two types of porogens: inorganic and organic. Inorganic porogens include ammonium carbonate, calcium carbonate, ammonium chloride and other high-temperature decomposable salts and various carbon powders; organic porogens mainly include natural fibers, high molecular polymers and organic acids, such as sawdust, starch, formazan, etc. methyl acrylate, etc. M...
Claims
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