Catalyst for selective catalytic reduction denitration of steam electric plant and preparation method thereof
A catalyst and selective technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of low catalyst use temperature, catalyst poisoning and deactivation, and catalyst coking Inactivation and other problems, to achieve high dispersion, slow down poisoning inactivation, reduce the effect of dosage
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Embodiment 1
[0031] This embodiment provides a catalyst for selective catalytic reduction and denitrification in thermal power plants, which is prepared according to the following specific steps:
[0032] (1) Dissolve 30g of urea in water to make a urea solution with a concentration of 1mol / L, and place it in an airtight corrosion-resistant container for use; 300g of corrugated γ-Al 2 o 3 The carrier was added to the urea solution, the temperature was raised to 80°C, and then stirred at a speed of 50r / min for 8 hours (in order to prevent the urea from decomposing and volatilizing during the stirring process, the container was sealed), then naturally cooled to room temperature, and the γ- al 2 o 3carrier, and the carrier was washed several times with desalted water to obtain surface-activated γ-Al 2 o 3 carrier;
[0033] (2) Dissolve 100g of ferric nitrate in 100mL of demineralized water to make a ferric nitrate solution, and the activated γ-Al 2 o 3 Put the carrier into the ferric n...
Embodiment 2
[0044] This embodiment provides a catalyst for selective catalytic reduction and denitrification in thermal power plants, which is prepared according to the following specific steps:
[0045] (1) Dissolve 20g of urea in water to make a urea solution with a concentration of 0.8mol / L, and place it in a sealable corrosion-resistant container for use; 2 o 3 Add the carrier into the urea solution, raise the temperature to 90°C, and stir at a speed of 100r / min for 6 hours (in order to prevent the urea from decomposing and volatilizing during the stirring process, the container is sealed), naturally cool to room temperature, and filter out the γ-Al 2 o 3 carrier, and the carrier was washed several times with desalted water to obtain surface-activated γ-Al 2 o 3 carrier.
[0046] (2) Dissolve 150g of ferric nitrate in 100mL of demineralized water to make a ferric nitrate solution, and the activated γ-Al 2 o 3 The carrier was added to the ferric nitrate solution, stirred at 70°C ...
Embodiment 3
[0057] This embodiment provides a catalyst for selective catalytic reduction and denitrification in thermal power plants, which is prepared according to the following specific steps:
[0058] (1) Dissolve 30g of urea in water to make a urea solution with a concentration of 1.5mol / L, and place it in an airtight corrosion-resistant container for use; 300g of corrugated γ-Al 2 o 3 The carrier was added to the urea solution, heated to 80°C, stirred at a speed of 70r / min for 8 hours, naturally cooled to room temperature, and γ-Al was filtered out 2 o 3 carrier, and the carrier was washed several times with desalted water to obtain surface-activated γ-Al 2 o 3 carrier.
[0059] (2) Dissolve 120g of ferric nitrate in 100mL of demineralized water to make a ferric nitrate solution, and the activated γ-Al 2 o 3 The carrier was put into the ferric nitrate solution, stirred at 70°C for 8 hours, then cooled and the prepared catalyst precursor was washed, then placed in a desiccator, ...
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