Spinel oxide catalyst for combustion flue gas purification and preparation method thereof
A spinel oxide and combustion flue gas technology, applied in metal/metal oxide/metal hydroxide catalysts, combustion methods, physical/chemical process catalysts, etc. , wide range of changes, etc., to achieve significant oxidation-reduction performance and thermal stability, and to improve the service life
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Embodiment 1
[0028] Preparation of SiO by hydrothermal method 2 The protective layer is prepared to have a high specific surface area and expose a highly active crystal plane. 0.15 mol tetrabutyl titanate was dissolved in 0.4 L hydroxypropyl cellulose ethanol solution to obtain a carrier precursor solution. 0.3 mol of zinc nitrate, 0.6 mol of cobalt nitrate and 0.9 mol of citric acid were dissolved in 1L of deionized water at room temperature to obtain a precursor solution for the active core layer. In this embodiment, zinc nitrate and cobalt nitrate, which are relatively cheap and easy to decompose, are used as raw materials for making the active core layer, so that the production cost of the catalyst is relatively low.
[0029] Dissolve 0.1mol of protective layer powder into the precursor solution of the active core layer, add 0.01mol of ethylenediaminetetraacetic acid and 0.01mol of dibutyltin dilaurate, transfer the solution to a hydrothermal kettle, heat to 80°C, and react for 2h to ...
Embodiment 2
[0034] Preparation of SiO by hydrothermal method 2 The protective layer. 0.4 mol tetrabutyl titanate was dissolved in 0.5 L hydroxypropyl cellulose ethanol solution to obtain a carrier precursor solution. 1 mol of nickel sulfate, 3 mol of cobalt sulfate and 5 mol of citric acid were dissolved in 3L of deionized water at room temperature to obtain a precursor solution for the active core layer.
[0035] Dissolve 0.2 mol of protective layer powder into the precursor solution of the active core layer, add 0.01 mol of ethylene dimercaptopropanol and 0.02 mol of dicumyl peroxide, transfer the solution to a hydrothermal kettle, heat to 60°C, and react for 8 hours to obtain First composite colloid.
[0036] The first composite colloid was dissolved in the precursor solution of the carrier, the solution was transferred to a hydrothermal kettle, heated to 90° C., and reacted for 1 hour to obtain the second composite colloid.
[0037] Coating a layer of nano-SiO on the surface of the...
Embodiment 3
[0040] Preparation of SiO by hydrothermal method 2 The protective layer. 0.6 mol of tetrabutyl titanate was dissolved in 1 L of hydroxypropyl cellulose ethanol solution to obtain a carrier precursor solution. 0.9 mol copper chloride, 2.25 mol cobalt chloride and 3.15 mol citric acid were dissolved in 2.5 L deionized water at room temperature to obtain a precursor solution for the active inner core layer.
[0041] Dissolve 0.3mol of protective layer powder into the precursor solution of the active core layer, add 0.03mol of sodium dimercaptopropanesulfonate and 0.05mol of di-tert-butyl peroxide, transfer the solution to a hydrothermal kettle, heat to 95°C, and react 4h, the first composite colloid was obtained.
[0042] The first composite colloid was dissolved in the precursor solution of the carrier, the solution was transferred to a hydrothermal kettle, heated to 65° C., and reacted for 8 hours to obtain the second composite colloid.
[0043] Coating a layer of nano-SiO o...
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Abstract
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