Multi metal reforming catalyst containing platinum, tin and its preparation and application
A technology for reforming catalysts and catalysts, applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., which can solve the problems of catalyst selectivity reduction and catalytic activity reduction
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[0033] The preparation method of the catalyst of the present invention includes introducing Group IVA metals, Eu and Ce into inorganic oxide carriers respectively, and then introducing Group VIII metals, preferably platinum, and drying and calcining are required for each introduced metal component.
[0034] The elements that should be introduced first in the catalyst preparation should be Group IVA metals, Eu and Ce. The order of their introduction can be arbitrary, the IVA group metal can be introduced into the carrier first, and then Eu and Ce can be introduced, or vice versa. Eu and Ce can be introduced simultaneously or step by step. However, after each operation of introducing metal components, it is best to perform roasting to ensure that the introduced components are firmly combined with the carrier.
[0035]The Group IVA metal component can be introduced into the catalyst in any manner to achieve a uniform distribution of the component. It can be introduced by co-pre...
Embodiment 1
[0052] Preparation of spherical catalysts of the present invention.
[0053] (1) Preparation of Sn-containing Al 2 o 3 carrier.
[0054] According to the method of CN1150169A embodiment 1, 100 grams of SB aluminum hydroxide powder (Germany, produced by Condea company) and an appropriate amount of deionized water make the liquid / solid weight ratio 2.0, stirring and slurrying. Add 7.5 milliliters of dilute nitric acid with a volume ratio of 1: 1, 30 grams of urea and a predetermined amount of tin protochloride hydrochloric acid solution, so that the Sn content in the solution is 0.30 mass % relative to dry base alumina, stir for 1 hour, add 30 grams of kerosene and 3 grams of fatty alcohol polyoxyethylene ether were stirred for 1 hour, and dropped into balls in the oil ammonia column. The wet bulb was solidified in ammonia water for 1 hour, then filtered, rinsed with deionized water for 2 to 3 times, dried at 60°C for 6 hours, dried at 120°C for 10 hours, and calcined at 600°...
Embodiment 2
[0062] Catalyst G is prepared by the method of embodiment 1, and difference is (3) the concentration of the cerium nitrate solution that cerium is added is 1.42 mass %, (2), (3) the solid 650 after two steps of leaching europium and cerium ℃ in air for 6 hours, and the composition of catalyst G obtained after hydrogen reduction is shown in Table 1.
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