Purification catalyst for exhaust gas, production method therefor, and purification catalyst device for exhaust gas
A technology for exhaust gas purification and manufacturing method, which is applied in exhaust devices, catalyst activation/preparation, chemical elements of heterogeneous catalysts, etc., and can solve problems such as reduction of active points and reduction of activity
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[0057] The present invention will be described in further detail below according to the examples.
[0058] 1. First Embodiment
manufacture example 1
[0060] 2.96 g (0.014 mol) of strontium nitrate, 1.86 g (0.007 mol) of palladium nitrate, and 3.75 g (0.028 mol) of malic acid were dissolved in 100 ml of ion-exchanged water to prepare a mixed metal nitrate aqueous solution. Then prepare the above-mentioned mixed metal nitrate aqueous solution, put it on the electric hot plate stirrer, stir it with a stirring bar, and evaporate and dry it at 250°C at the same time, then transfer it to an alumina crucible, and use a muffle furnace to heat the mixture at 2.5°C / min The speed is raised to 350°C, and heat treatment is performed at 350°C for 3 hours. Thus, a pseudo-calcined body from which nitrate groups were removed was produced.
[0061] The above-mentioned to-be-roasted body was pulverized and mixed for 15 minutes in a mortar, and then put into an alumina crucible, and the temperature was raised to 750°C with a muffle furnace at a rate of 5°C / min, and kept at 750°C for 10 hours to perform the main roasting. Next, the catalyst po...
manufacture example 2
[0063] Using barium nitrate instead of the strontium nitrate used in the above Production Example 1, Ba 2 PdO 3 exhaust gas purification catalyst. The other conditions were the same as in Production Example 1.
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