Method for producing a catalyst and the catalyst made therefrom
View Patent ↗Disclosed herein are methods for manufacturing a catalyst composition. In one embodiment, a method for manufacturing a catalyst can comprise: forming a catalyst composition from a catalyst precursor and a volatile compound, disposing the catalyst composition on a substrate to form a supported composition, treating the supported composition with electromagnetic radiation, and removing at least a portion of the volatile compound to form the catalyst. In another embodiment, the method for manufacturing a catalyst can comprise: forming a catalyst composition comprising a volatile compound and a catalyst precursor, disposing the catalyst composition onto a substrate, and drying the catalyst composition at a temperature greater than or equal to a dew point of the volatile compound and less than or equal to a decomposition temperature of the catalyst precursor.
1. A method for manufacturing a catalyst for use in an exhaust emission control device, comprising:
forming a catalyst composition from a catalyst precursor and a volatile compound;
disposing the catalyst composition on a substrate to form a supported composition;
treating the supported composition with electromagnetic radiation; and
removing at least a portion of the volatile compound to form an uncalcined catalyst layer,
wherein the substrate is selected from the group consisting of foils, preforms, mats, fibrous materials and monoliths, and wherein the catalyst is not calcined prior to contact with a stream to be treated.
2. The method of claim 1 , wherein the electromagnetic radiation comprises a frequency selected from the group consisting of radio frequency, microwave frequency, and a combination comprising at least one of the foregoing frequencies.
3. The method of claim 2 , wherein the radio frequency radiation and microwave frequency radiation are sequentially utilized.
4. The method of claim 1 , wherein greater than or equal to about 90 wt % of the volatile compound is removed.
5. The method of claim 1 , wherein greater than or equal to about 98 wt % of the volatile compound is removed.
6. The method of claim 1 , wherein the removal of at least a portion of the volatile compound further comprises agitating.
7. The method of claim 1 , wherein the electromagnetic radiation treats the supported composition without calcining.
8. The method of claim 1 , wherein the uncalcined catalyst layer comprises a concentration gradient of less than or equal to about 20%.
9. The method of claim 8 , wherein the concentration gradient is less than or equal to about 15%.
10. The method of claim 1 , further comprising calcining the uncalcined catalyst layer.
11. The method of claim 1 , further comprising providing a calcined catalyst layer.
12. A method for manufacturing a catalyst for use in an exhaust emission control device, comprising:
forming a catalyst composition from a catalyst precursor and a volatile compound;
disposing the catalyst composition on a substrate to form a supported composition;
treating the supported composition with electromagnetic radiation;
removing at least a portion of the volatile compound to form an uncalcined catalyst layer, wherein the substrate is selected from the group consisting of foils, preforms, mats, fibrous materials and monoliths; and
installing the catalyst in the exhaust emission control device and then calcining the catalyst.
13. The method of claim 12 , wherein the electromagnetic radiation comprises a frequency selected from the group consisting of radio frequency, microwave frequency, and a combination comprising at least one of the foregoing frequencies.
14. The method of claim 13 , wherein the radio frequency radiation and microwave frequency radiation are sequentially utilized.
15. The method of claim 13 , wherein the catalyst is not calcined prior to contact with a stream to be treated.
16. The method of claim 12 , wherein greater than or equal to about 90 wt % of the volatile compound is removed.
17. The method of claim 12 , wherein greater than or equal to about 98 wt % of the volatile compound is removed.
18. The method of claim 12 , wherein the removal of at least a portion of the volatile compound further comprises agitating.
19. The method of claim 12 , wherein the electromagnetic radiation treats the supported composition without calcining
20. The method of claim 19 , wherein the catalyst is not calcined prior to contact with a stream to be treated.
21. The method of claim 12 , wherein the uncalcined catalyst layer comprises a concentration gradient of less than or equal to about 20%.
22. The method of claim 21 , wherein the concentration gradient is less than or equal to about 15%.
23. The method of claim 12 , further comprising calcining the uncalcined catalyst layer.
24. The method of claim 12 , further comprising providing a calcined catalyst layer.