Modified honeycomb monolithic catalyst for synchronously removing organic waste gas and NOx in coal-fired flue gas as well as preparation method and application of modified honeycomb monolithic catalyst
An integrated catalyst, 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 low mechanical strength of catalyst, large amount of catalyst, cost High problems, to achieve the effect of simple and easy preparation method, wide temperature window and high activity
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Embodiment 1
[0031] MoOx-V 2 o 5 -WO 3 / TiO 2 - powder catalyst
[0032] Add 0.0458g of V precursor ammonium metavanadate and 0.1654g of W precursor ammonium tungstate into 30mL of deionized water and mix thoroughly, place in a heat-collecting constant temperature magnetic stirrer and stir for 45min to dissolve, and then Add 1.8 g of oxalic acid precursor under stirring state, and continue to stir vigorously at constant temperature after ultrasonication for 60 min to prepare a mixed precursor solution. Add 0.11 g of ammonium molybdenum molybdate in the stirring state, continue to stir vigorously at constant temperature for 30 minutes after ultrasonication, and prepare a mixed precursor solution; TiO as the catalyst carrier 2 Take out after drying in a vacuum oven, cool to room temperature for use; the TiO 2 The mass is 2g. Add the TiO of the above-mentioned oven-dried carrier under agitation 2 , continue to stir at a constant temperature for 90 minutes until evaporated to dryness, d...
Embodiment 2
[0034] Mo-cordierite monolithic catalyst - impregnated
[0035] Add 0.458g of V precursor ammonium metavanadate and 1.654g of W precursor ammonium tungstate into 60mL of deionized water and mix thoroughly, place in a collector type constant temperature magnetic stirrer at constant temperature and stir for 30min to dissolve, ultrasonic After 60 minutes, continue to stir vigorously at constant temperature to prepare a mixed precursor solution. Add 0.11 g of ammonium molybdate under stirring state, continue to stir vigorously at constant temperature for 30 min after ultrasonication, and prepare a mixed precursor solution; TiO as a catalyst carrier 2 Take out after drying in a vacuum oven, cool to room temperature for use; the TiO 2 The mass is 20g; the cordierite honeycomb ceramics is cut into a sample block with a diameter of 25mm and a height of 8mm. Before loading, all sample blocks were ultrasonically treated, then dried in a vacuum oven, and calcined to remove various adso...
Embodiment 3
[0038] Cu-cordierite monolithic catalyst-silica sol catalyst
[0039] Add 0.458g of V precursor ammonium metavanadate and 1.654g of W precursor ammonium tungstate into 60mL of deionized water and mix thoroughly, place in a heat-collecting constant-temperature magnetic stirrer and stir for 30 minutes to dissolve it. Add 0.8g of oxalic acid precursor under stirring, continue to stir vigorously at constant temperature after ultrasonication for 60min, and prepare a mixed precursor solution; add 5.4g of copper nitrate under stirring, continue vigorously stirring at constant temperature for 30min after ultrasonication, and prepare a mixed precursor solution; TiO will be used as catalyst support 2 Take out after drying in a vacuum oven, cool to room temperature for use; the TiO 2 The mass is 20g; the cordierite honeycomb ceramics is cut into a sample block with a diameter of 25mm and a height of 8mm. Before loading, all sample blocks were ultrasonically treated, then dried in a vac...
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