Method for preparing formaldehyde by methane photocatalytic oxidation
A photocatalytic oxidation and photocatalytic reaction technology, applied in the chemical industry, can solve the problems of high reaction temperature and low conversion rate of formaldehyde
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Embodiment 1
[0021] Dissolve 0.1g~1g of zinc sulfate in 0~20ml of water, measure 5~20ml of aniline aqueous solution with a volume ratio of 0~10 and add it to the reaction kettle, and then add 0~5ml of molybdenum with a concentration of 0~1mol / L Add the ammonium acid solution into the reaction kettle, then add 0~10g molecular sieve into the reaction kettle, stir evenly, seal it, and react for 10h at 120°C. After the reaction is completed, take out the reactant and wash it several times with water and absolute ethanol respectively. , and then calcined at 450°C for 2h.
[0022] The experiment of preparing formaldehyde by photocatalytic oxidation of methane was carried out in a gas-phase photochemical reactor, with a high-pressure mercury lamp (500W) as the light source (linear light source), and the photocatalyst prepared above was evenly placed in the middle of the gas-phase photocatalytic reactor. , feed methane and air in a certain proportion, and raise the temperature to 100°C, and then c...
Embodiment 2
[0024] Dissolve 0.1g~1g of zinc sulfate in 1~20ml of water, measure 5~20ml of ethylenediamine aqueous solution with a volume ratio of 2~10 and add it to the reaction kettle, and then add 0~5ml of it to a concentration of 0~1mol / L Add the ammonium molybdate solution into the reaction kettle, then add 0~10g molecular sieve into the reaction kettle, stir evenly, seal it, and react for 10h at 120°C. After the reaction is completed, take out the reactants and wash them with water and absolute ethanol respectively. several times, and then calcined at 450°C for 2h.
[0025] The experiment of preparing formaldehyde by photocatalytic oxidation of methane was carried out in a gas-phase photochemical reactor, with a high-pressure mercury lamp (500W) as the light source (linear light source), and the photocatalyst prepared above was evenly placed in the middle of the gas-phase photocatalytic reactor. , feed methane and air in a certain proportion, and raise the temperature to 100°C, and t...
Embodiment 3
[0027] Dissolve 0.1g~1g of zinc sulfate in 1~20ml of water, measure 5~20ml of aniline aqueous solution with a volume ratio of 2~10 and add it to the reaction kettle, then add 0~5ml of molybdenum with a concentration of 0~1mol / L Add the ammonium acid solution into the reaction kettle, then add 0~10g molecular sieve into the reaction kettle, stir evenly, seal it, and react at 150°C for 10h. After the reaction is completed, take out the reactant and wash it several times with water and absolute ethanol respectively. , and then calcined at 550°C for 2h.
[0028] The experiment of preparing formaldehyde by photocatalytic oxidation of methane was carried out in a gas-phase photochemical reactor, with a high-pressure mercury lamp (500W) as the light source (linear light source), and the photocatalyst prepared above was evenly placed in the middle of the gas-phase photocatalytic reactor. , feed methane and air in a certain proportion, and raise the temperature to 80°C, and carry out i...
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