A catalyst for resource utilization of sulfur and nitrogen in the absorption liquid of simultaneous desulfurization and denitrification process by magnesium method and its preparation and application
A technology for desulfurization, denitrification, and liquid absorption, which is applied in the field of catalysts and preparations for efficient and collaborative resource utilization of sulfur and nitrogen elements, which can solve problems such as secondary pollution of catalysts, and achieve the effects of easy recycling, avoiding secondary pollution, and high catalytic efficiency
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Embodiment 1
[0035] Embodiment 1: the catalytic effect of different catalyst consumption
[0036] Weigh Mn(NO 3 ) 2 ·6H 2 O 2.3933g, Co(NO 3 ) 2 ·6H 2 O 0.6067g, Ce(NO 3 ) 3 ·6H 2 O0.1554g, Ca(NO 3 ) 2 4H 2 O 0.0846g was mixed into a uniform aqueous solution, 60.000g of SBA-15 molecular sieve was mixed with the prepared nitrate solution, stirred continuously at room temperature for 8 hours, dried at 100°C for 12 hours, and calcined at 550°C for 4 hours to obtain a solid phase catalyst.
[0037] The prepared catalyst was added to five parallel experimental groups, and the catalyst concentration was maintained at 20g / L, 40g / L, 60g / L, 80g / L, and 100g / L, respectively, and the oxidation efficiency was measured under the same reaction conditions.
[0038] Experimental results such as figure 1 It was shown that the catalyst can effectively increase the oxidation rate of magnesium sulfite and magnesium nitrite, and the oxidation rate increases with the increase of catalyst dosage. Wh...
Embodiment 2
[0039] Example 2: Influence of the ratio of main active components on the catalytic effect under the condition that the total catalyst loading is constant
[0040] case2:
[0041] Weigh Mn(NO 3 ) 2 ·6H 2 O 1.9907g, Co(NO 3 ) 2 ·6H 2 O 1.0093g, Ce(NO 3 ) 3 ·6H 2 O0.1554g, Ca(NO 3 ) 2 4H 2 O 0.0846g was mixed into a uniform aqueous solution, 60.000g of SBA-15 molecular sieve was mixed with the prepared nitrate solution, stirred continuously at room temperature for 8 hours, dried at 100°C for 12 hours, and calcined at 550°C for 4 hours to obtain the main activity Component Mn 2+ with Co 2+ The molar ratio is 2:1 (promoter Ce 3+ with Ca 2+ The molar ratio is 1:1) solid phase catalyst. Add 8.000 g of the prepared catalyst into the simultaneous desulfurization and denitrification absorption liquid by the magnesium method, and maintain the catalyst concentration at 40 g / L. At this time, the oxidation rates of magnesium sulfite and magnesium nitrite in 90 minutes are 7...
Embodiment 3
[0051] Example 3: Influence of different loadings of main active components on catalytic effect under the condition of constant co-catalyst loading
[0052] case7:
[0053] Weigh Mn(NO 3 ) 2 ·6H 2 O 0.2393g, Co(NO 3 ) 2 ·6H 2 O 0.0607g, Ce(NO 3 ) 3 ·6H 2 O0.1554g, Ca(NO 3 ) 2 4H 2 O 0.0846g was mixed into a homogeneous aqueous solution, 60.000g of SBA-15 molecular sieve was mixed with the prepared nitrate solution, stirred continuously at room temperature for 8 hours, dried at 100°C for 12 hours, and calcined at 550°C for 4 hours to obtain the main activity Solid phase catalyst with a component loading of 0.5% (0.4% co-catalyst loading). Add 8.000 g of the prepared catalyst into the simultaneous desulfurization and denitrification absorption liquid by the magnesium method, and maintain the catalyst concentration at 40 g / L. At this time, the oxidation rates of magnesium sulfite and magnesium nitrite in 90 minutes are 75.7%, 21.2%, respectively, which are relatively ...
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