Spherical cerium-manganese composite oxide low-temperature denitration catalyst and its preparation method and application
A composite oxide, low-temperature denitration technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc. Deactivation sintering and other problems, to achieve the effect of simple preparation method, good water resistance and sulfur resistance
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Embodiment 1
[0018] Example 1: Ce 0.1 mn 0.9 o 2 Preparation of composite oxide catalyst
[0019] a) Take 7.2ml of 0.50mol / L cerium nitrate solution and 16.2ml of 2.00mol / L manganese nitrate solution respectively, and stir in a water bath at 30°C for 30 minutes to obtain a mixed solution;
[0020] b) Add 28.8ml of 5.00mol / L ammonium carbonate solution to the mixed solution obtained in step a) under constant stirring, transfer the resulting mixed solution to a hydrothermal reaction kettle, and perform a hydrothermal reaction at 150°C for 12 hours, then drop to room temperature;
[0021] c) Suction filter the reaction solution obtained in step b), wash, dry at 120°C for 12 hours, and then bake in a muffle furnace at 500°C for 6 hours to prepare a spherical cerium-manganese composite oxide catalyst.
Embodiment 2
[0022] Example 2: Ce 0.2 mn 0.8 o 2 Preparation of composite oxide catalyst
[0023] a) Take 7.2ml of 1.00mol / L cerium nitrate solution and 14.4ml of 2.00mol / L manganese nitrate solution respectively, and stir in a water bath at 40°C for 60 minutes to obtain a mixed solution;
[0024] b) Add 30 ml of 6.00 mol / L ammonium carbonate solution to the mixed solution obtained in step a) under constant stirring, transfer the resulting mixed solution to a hydrothermal reaction kettle, perform a hydrothermal reaction at 150°C for 24 hours, and then lower to room temperature ;
[0025] c) suction filter the reaction liquid obtained in step b), wash, dry at 120°C for 24 hours, and then bake in a muffle furnace at 500°C for 4 hours to prepare a spherical cerium-manganese composite oxide catalyst.
Embodiment 3
[0026] Example 3: Ce 0.3 mn 0.7 o 2 Preparation of composite oxide catalyst
[0027] a) Take 10.8ml of 1.00mol / L cerium nitrate solution and 25.2ml of 1.00mol / L manganese nitrate solution respectively, and stir in a water bath at 40°C for 20 minutes to obtain a mixed solution;
[0028] b) Add 27 ml of 8.00 mol / L ammonium carbonate solution to the mixed solution obtained in step a) under constant stirring, transfer the resulting mixed solution to a hydrothermal reaction kettle, perform a hydrothermal reaction at 150°C for 36 hours, and then lower to room temperature ;
[0029] c) The reaction solution obtained in step b) was suction filtered, washed, dried at 120°C for 24 hours, and then calcined in a muffle furnace at 400°C for 4 hours to prepare a spherical cerium-manganese composite oxide catalyst.
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