Tail gas treatment catalyst as well as preparation method and application thereof
A technology for exhaust gas treatment and catalyst, which is applied in catalyst activation/preparation, physical/chemical process catalyst, gas treatment, etc., and can solve problems such as ineffective purification
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Embodiment 1
[0098] Palladium nitrate and rhodium nitrate solutions were loaded onto oxygen storage material (OSM) and alumina (Al 2 o 3 ), dry at 80°C for 6h, and bake at 500°C for 2h, wherein the palladium material is marked as M1-1, and the rhodium material is marked as M1-2;
[0099] Platinum nitrate solution was loaded onto alumina (Al 2 o 3 ), dry at 80°C for 6h, and bake at 500°C for 2h, denoted as M2-1;
[0100] The copper nitrate solution was loaded on SSZ-13 molecular sieve by ion exchange method, dried at 80°C for 6h, and calcined at 500°C for 2h, which was designated as M2-2;
[0101] Mix M1-1 with aluminum sol, ball mill for 10 minutes, and the binder accounts for 3%, to obtain slurry N1-1 with a solid content of 45%;
[0102] Mix M1-2 with aluminum sol, ball mill for 10 minutes, the binder accounts for 3%, and obtain slurry N1-2 with a solid content of 45%;
[0103] Mix M2-1 with aluminum sol, ball mill for 10 minutes, the binder accounts for 3%, and obtain slurry N2-1 w...
Embodiment 2
[0111] Apply N1-1 in Example 1 to the front 2 / 3 of the cordierite carrier, the size of the cordierite carrier is Φ25.4*76.2 / 400cpsi-4mil, dry at 80°C for 6h, and calcinate at 500°C for 2h to obtain the catalyst C3- 1, coating amount 120g / L, precious metal content 145g / ft 3 ;
[0112] Apply N1-2 in Example 1 to the upper layer of C3-1, dry at 80°C for 6h, and calcine at 500°C for 2h to obtain catalyst C3-2, the coating amount of the upper layer is 60g / L, and the precious metal content of the upper layer is 5g / ft 3 , the total coating amount of the front-end catalyst is 180g / L, and the total precious metal content is 150g / ft 3 ;
[0113] Apply N2-1 in Example 1 to the last 1 / 3 of the cordierite carrier, dry at 80°C for 6h, and calcine at 500°C for 2h to obtain catalyst C3-3 with a coating weight of 60g / L and a precious metal content of 3g / ft 3 ;
[0114] Apply N2-2 in Example 1 to the upper layer of C3-3, dry at 80°C for 6h, and bake at 500°C for 2h to obtain catalyst C3-4, ...
Embodiment 3
[0117] Apply N1-1 in Example 1 to the front 2 / 3 of the cordierite carrier, the size of the cordierite carrier is Φ25.4*76.2 / 400cpsi-4mil, dry at 80°C for 6h, and bake at 500°C for 2h to obtain the catalyst C4- 1, coating amount 120g / L, precious metal content 145g / ft 3 ;
[0118] Apply N1-2 in Example 1 to the upper layer of C4-1, dry at 80°C for 6h, and calcine at 500°C for 2h to obtain catalyst C4-2. 3 , the total coating amount of the front-end catalyst is 180g / L, and the total precious metal content is 150g / ft 3 ;
[0119] Apply N2-1 in Example 1 to the last 1 / 3 of the cordierite carrier, dry at 80°C for 6h, and calcine at 500°C for 2h to obtain catalyst C4-3 with a coating weight of 60g / L and a precious metal content of 3g / ft 3 ;
[0120] Apply N2-2 in Example 1 to the upper layer of C4-3, dry at 80°C for 6h, and bake at 500°C for 2h to obtain catalyst C4-4, with a coating amount of 150g / L and a total coating amount of the latter stage of 210g / L .
[0121] The cataly...
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