A modified monolithic catalyst for synergistic removal of organic waste gas and NOx in coal-fired flue gas, its preparation method and application
A monolithic catalyst and organic waste gas technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of organic pollution without effective treatment and targeted control Technology and process, unable to directly apply adsorption and catalytic oxidation technology and materials, and complex environmental components, etc., to achieve the effects of easy large-scale preparation and commercialization, reduced preparation cost, and high activity
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Embodiment 1
[0042] Pt-monolithic catalyst preparation:
[0043] Chloroplatinic acid was added to deionized water, followed by continuous constant-temperature vigorous stirring after ultrasonication. The ultrasonic time was 90 min, the stirring time was 90 min, and the stirring temperature was 70 °C to prepare a precursor solution. The precursor solution was added to deionized water, and then titanium dioxide was added. Ultrasonic, heating and stirring, the ultrasonic time was 60min, the stirring time was 96in, and the stirring temperature was 65℃, in which the mass fraction of Pt accounted for 0.1% of the mass of titanium dioxide, and the mass fraction of titanium dioxide accounted for 10% of the vanadium-titanium material; remove the adsorbed impurities from the vanadium-titanium and blow it off with an air compressor; soak the vanadium-titanium material in the coating solution with ultrasonic stirring and coating. During the coating process, the ultrasonic time is 5min, and the stirring ...
Embodiment 2
[0046] Cu-monolithic catalyst preparation:
[0047] Add copper nitrate, ammonium metavanadate, ammonium tungstate, and oxalic acid into deionized water, and continue to stir at constant temperature after ultrasonication. The mass fraction of Cu accounts for 5% of the aqueous solution, the mass fraction of vanadium accounts for 3.5% of the aqueous solution, the mass fraction of tungsten accounts for 2.5% of the aqueous solution, and the mass fraction of oxalic acid accounts for 15% of the aqueous solution. Various impurities are blown off with an air compressor; the vanadium-titanium material is immersed in the immersion solution with ultrasonic stirring and immersion. During the immersion process, the ultrasonic time is 5min, the stirring time is 5min, and the stirring temperature is 65 ℃. Then the residual suspension was purged to form a uniform film on the surface of the substrate and dried; the above coating process was repeated 5 times; the sample was aged overnight and dr...
Embodiment 3
[0050] Mo-monolithic catalyst preparation:
[0051] Ammonium heptamolybdate, ammonium metavanadate, ammonium tungstate, and oxalic acid were added to deionized water, and after sonication, constant temperature and vigorous stirring was continued. The mass fraction of molybdenum accounts for 0.5% of the aqueous solution, the mass fraction of vanadium accounts for 3.5% of the aqueous solution, the mass fraction of tungsten accounts for 2.5% of the aqueous solution, and the mass fraction of oxalic acid accounts for 15% of the aqueous solution. Various impurities are blown off with an air compressor; the vanadium-titanium material is immersed in the immersion solution with ultrasonic stirring and immersion. During the immersion process, the ultrasonic time is 5min, the stirring time is 5min, and the stirring temperature is 65 ℃. Then the residual suspension was purged to form a uniform film on the surface of the substrate and dried; the above coating process was repeated 5 times; ...
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