CO oxidation catalyst with high thermal stability as well as preparation method and application thereof
An oxidation catalyst, high thermal stability technology, applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., can solve unsuitable large-scale industrial production and preparation process Complicated problems, to achieve excellent thermal stability, simple preparation process, and good thermal stability
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Embodiment 1
[0031] Preparation of aluminum sol: Dissolve a certain amount of aluminum isopropoxide in deionized water at 80°C with magnetic stirring and reflux. The molar ratio of water to aluminum isopropoxide is 150:1. After heating and hydrolyzing for 2 hours, increase the hydrolysis temperature Raise to 90°C, stir in the open for 1 hour, add a certain amount of deionized water, add inorganic acid (nitric acid) to adjust the pH to between 3, condense and reflux at 95°C for 12 hours, and obtain a stable transparent aluminum sol;
[0032] γ-Al 2 o 3 Preparation: Dissolve an appropriate amount of surfactant (sodium oleate) in deionized water at 80°C with magnetic stirring, then add a certain amount of the aluminum sol prepared above and keep stirring for 8 h, wherein the surfactant, deionized The mass ratio of ionized water and aluminum sol was 1:12:15; the resulting mixed solution was transferred to a hydrothermal reaction kettle and kept at 180°C for 72 h; after natural cooling to room...
Embodiment 2
[0035] Preparation of aluminum sol: Dissolve a certain amount of aluminum isopropoxide in deionized water at 75°C with magnetic stirring and reflux. The molar ratio of water to aluminum isopropoxide is 150:1. After heating and hydrolyzing for 2 hours, increase the hydrolysis temperature Raise to 90°C, stir in the open for 1 hour, add a certain amount of deionized water, add inorganic acid (nitric acid) to adjust the pH to between 3, condense and reflux at 95°C for 12 hours, and obtain a stable transparent aluminum sol;
[0036] γ-Al 2 o 3Preparation: Dissolve an appropriate amount of surfactant (sodium oleate) in deionized water at 80°C with magnetic stirring, then add a certain amount of the aluminum sol prepared above and keep stirring for 8 h, wherein the surfactant, deionized The mass ratio of ionized water and aluminum sol was 1:11:14; the resulting mixed solution was transferred to a hydrothermal reaction kettle and kept at 180°C for 72 h; after natural cooling to room ...
Embodiment 3
[0039] Preparation of aluminum sol: Dissolve a certain amount of aluminum isopropoxide in deionized water at 70°C with magnetic stirring and reflux. The molar ratio of water to aluminum isopropoxide is 150:1. After heating and hydrolyzing for 2 hours, increase the hydrolysis temperature Raise to 90°C, stir in the open for 1 hour, add a certain amount of deionized water, add inorganic acid (nitric acid) to adjust the pH to between 3, condense and reflux at 95°C for 12 hours, and obtain a stable transparent aluminum sol;
[0040] γ-Al 2 o 3 Preparation: Dissolve an appropriate amount of surfactant (sodium oleate) in deionized water at 80°C with magnetic stirring, then add a certain amount of the aluminum sol prepared above and keep stirring for 8 h, wherein the surfactant, deionized The mass ratio of ionized water and aluminum sol was 1:12:16; the resulting mixed solution was transferred to a hydrothermal reactor and kept at 180°C for 72 h; after cooling to room temperature nat...
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Abstract
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