A cerium-tantalum composite oxide denitration catalyst and its preparation and application
A composite oxide and denitration catalyst technology, applied in the purification of nitrogen oxides, cerium-tantalum composite oxide denitration catalyst and its preparation and application, can solve the problem of low SCR activity and achieve improved catalytic activity and hydrothermal stability High stability, high hydrothermal stability, and high activity
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Embodiment 1
[0025] Ce 3 Ta 1 o 8.5 sample preparation
[0026] (1) 8g of cerium nitrate and 2.20g of tantalum pentachloride are added respectively in two parts of anhydrous methanol with a volume of 50mL;
[0027] (2) Mix the alcohol solutions prepared in (1) with each other, and stir at room temperature for 30 minutes;
[0028] (3) Add the mixed solution obtained in (2) into 50mL of ammonia solution to ensure that the pH value is between 9 and 10, and then stir and age at room temperature for 1 hour;
[0029] (4) Suction filter the material obtained in (3), and then dry it in an oven at 110° C. for 12 hours to obtain a semi-finished product;
[0030] (5) Put the semi-finished product obtained in (4) into a muffle furnace, and roast at 500° C. for 5 hours to prepare a novel cerium-tantalum composite oxide denitration catalyst.
[0031] The catalyst is at 500ppm NO, 500ppm NH 3 , 5%O 2 , 5.5% (when needed), the remaining gas is N 2 Under the reaction conditions, the consumption of ...
Embodiment 2
[0033] Ce 1 Ta 1 o 4.5 sample preparation
[0034] (1) adding 6g of cerium nitrate and 4.95g of tantalum pentachloride into two parts of anhydrous methanol with a volume of 50mL;
[0035] (2) Mix the alcohol solutions prepared in (1) with each other, and stir at room temperature for 30 minutes;
[0036] (3) Add the mixed solution obtained in (2) into 50 mL of ammonium solution to ensure that the pH value is between 9 and 10, and then stir and age at room temperature for 1 hour;
[0037] (4) Suction filter the material obtained in (3), and then dry it in an oven at 120° C. for 10 hours to obtain a semi-finished product;
[0038] (5) Put the semi-finished product obtained in (4) into a muffle furnace, and bake it at 450° C. for 6 hours to prepare a novel cerium-tantalum composite oxide denitration catalyst.
[0039] The catalyst is at 500ppm NO, 500ppm NH 3 , 5%O 2 , 5.5% (when needed), the remaining gas is N 2 Under the reaction conditions, the consumption of catalyst i...
Embodiment 3
[0041] Ce 1 Ta 3 o 9.5 sample preparation
[0042] (1) adding 3g of cerium nitrate and 7.42g of tantalum pentachloride respectively into two parts of anhydrous methanol with a volume of 100mL;
[0043] (2) Mix the alcohol solutions prepared in (1) with each other, and stir at room temperature for 60 min;
[0044] (3) Add the mixed solution obtained in (2) into 50mL of ammonium solution to ensure that the pH value is between 9 and 10, and then stir and age at room temperature for 2 hours;
[0045] (4) Suction filter the material obtained in (3), and then dry it in an oven at 100° C. for 14 hours to obtain a semi-finished product;
[0046] (5) Put the semi-finished product obtained in (4) into a muffle furnace, and roast at 500° C. for 5 hours to prepare a novel cerium-tantalum composite oxide denitration catalyst.
[0047] The catalyst is at 500ppm NO, 500ppm NH 3 , 5%O 2 , 5.5% (when needed), the remaining gas is N 2 Under the reaction conditions, the consumption of ca...
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