Catalyst as well as preparation method and application thereof
The invention discloses a catalyst as well as a preparation method and an application thereof. The catalyst is prepared by taking active carbon (AC) as a carrier and magnesium (Mn) as an active component and adopting a liquid phase deposition method. The prepared catalyst is high in oxidative activity; when nitrogen oxide in smoke is removed by using the catalyst, the removal efficiency under the condition of low oxygen and low temperature is high; the oxidizability of NOX in the smoke after the oxidization operation is 45-65%; and a denitrated byproduct can be recovered for reutilization. 1. A preparation method for a catalyst, which is characterized in that according to the following steps: (1) carrier pre-treatment The carrier is activated carbon and pulverize to 40-60 mesh, the percentage concentration of quality is dipped sequentially 30-50% nitric acid, the percentage concentration of quality 10-30% ethanol, distilled water, at room temperature are respectively sequentially ultrasonic washing 20-40min, finally 100-120 the thermostatic drying [...] 1-3h; (2) the active constituent is supported The manganese salt is mixed with water to a concentration of 0.01-0.05mol/L solution , The mass percentage concentration is 10-40% hydrofluoric acid solution is added to the solution of the mixed solution prepared in I II, wherein F-: Mn2+ molar ratio of 3-5; the ammonia water is added to the mixed solution In I, by III, III and control the mixed solution to pH 8.4-10.1; The step (1) submerged in a mixed solution of the treated activated carbon In stirring at room temperature, wherein the Mn2+ the quality of the activated carbon a ratio of 0.1-0.9, then 40-60 the deposited [...] 1-4h, repeating the above-mentioned mixing process 1-3 times, filtering to collect the precipitate, 100-120 the dry the [...] 1-3h, under air atmosphere 250-450 the roasting [...] 2-4h, that is, to obtain the catalyst. 2. The preparation method of the catalyst according to Claim 1, characterized in that manganese salt is ethanoic acid manganese , manganese chloride, manganese nitrate, or manganese sulfate. 3. Claim 1 the catalyst prepared by the method of preparation of the catalyst. 4. Claim 3 the catalyst in removing the application of nitrogen oxides in the flue gas, which is characterized in that according to the following method: the catalyst is placed in the fixed tubular reactor, to 150-300ml/min flow, flue gas to be treated is injected, flue gas containing volume percentage of 0.3-0.8% NO and the volume percentage of 2-8% O2, to N2 for balancing the gas, the processing temperature is the 30-200 [...] , airspeed is 5000-25000h-1, by the oxidation treatment in the flue gas into the ammonia water, ammonium nitrate product prepared.