Bimetallic Cu/Mn catalysts for selective catalytic reduction
A catalyst, selected technology, applied in the direction of physical/chemical process catalysts, molecular sieve catalysts, non-metallic elements, etc., can solve problems such as undesired products
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Embodiment 1
[0163] Example 1 - Standard SCR
[0164] The molecular sieves are impregnated with metals using the required amount of manganese(II) acetate and / or copper(II) acetate dissolved in demineralized water. The metal-impregnated samples were dried overnight at 80°C and then calcined at 550°C for 4 hours in air. A catalyst with the following formulation was prepared:
[0165] • AEI zeolite with 1.5 wt% exchanged Cu and 1.5 wt% exchanged Mn (1.5Cu-1.5Mn.AEI)
[0166] • AEI zeolite with 2 wt% exchanged Cu and 2 wt% exchanged Mn (2Cu-2Mn.AEI)
[0167] · AEI zeolite with 3 wt% exchanged Cu (3Cu.AEI)
[0168] Granular samples of the powdered catalyst were then tested for NO under the following conditions x Conversion and N 2 O yield: 500ppmNH 3 , 500ppm NO, 0ppm NO 2 , 14%O 2 , 4.6%H 2 O, 5.0% CO 2 and a margin of N 2 , the airspeed is 90K h -1 . In the above gas mixture (NH 3 Except) the sample was heated from room temperature to 150°C. At 150°C, the NH 3 Add to the gas...
Embodiment 2
[0172] Example 2 - Fast SCR
[0173] The molecular sieves are impregnated with metals using the required amount of manganese(II) acetate and / or copper(II) acetate dissolved in demineralized water. The metal-impregnated samples were dried overnight at 80°C and then calcined at 550°C for 4 hours in air. A catalyst with the following formulation was prepared:
[0174] · AEI zeolite with 1.5 wt% exchanged Cu and 1.5 wt% exchanged Mn, 1.5Cu-1.5Mn.AEI
[0175] · AEI zeolite with 3 wt% exchanged Cu, 3Cu.AEI
[0176] Granular samples of the powdered catalyst were then tested for NO under the following conditions x Conversion and N 2 O yield: 500ppmNH 3 , 250ppm NO, 250ppm NO 2 , 14%O 2 , 4.6%H 2 O, 5.0% CO 2 and a margin of N 2 , the airspeed is 90K h -1 . In the above gas mixture (NH 3 Except) the sample was heated from room temperature to 150°C. At 150°C, the NH 3 Add to the gas mixture and keep the sample under these conditions for 30 min. Then at 5°C min -1 The ...
Embodiment 3
[0178] Example 3 - Slow SCR
[0179] The molecular sieves are impregnated with metals using the required amount of manganese(II) acetate and / or copper(II) acetate dissolved in demineralized water. The metal-impregnated samples were dried overnight at 80°C and then calcined at 550°C for 4 hours in air. A catalyst with the following formulation was prepared:
[0180] · AEI zeolite with 1.5 wt% exchanged Cu and 1.5 wt% exchanged Mn, 1.5Cu-1.5Mn.AEI
[0181] · AEI zeolite with 3 wt% exchanged Cu, 3Cu.AEI
[0182] Granular samples of the powdered catalyst were then tested for NO under the following conditions x Conversion and N 2 O yield: 500ppmNH 3 , 175ppm NO, 325ppm NO 2 , 14%O 2 , 4.6%H 2 O, 5.0% CO 2 and a margin of N 2 , the airspeed is 90K h -1 . In the above gas mixture (NH 3 Except) the sample was heated from room temperature to 150°C. At 150°C, the NH 3 Add to the gas mixture and keep the sample under these conditions for 30 min. Then at 5°C min -1The t...
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