Manganese oxide catalyst as well as preparation method and application of manganese oxide catalyst

Abstract

The invention relates to a manganese oxide catalyst as well as a preparation method and application of the manganese oxide catalyst. The preparation method comprises the steps: dissolving a manganesesource or a mixture of the manganese source and a composite metal source, adding urea, stirring, heating and precipitating the solution, and then, carrying out solid-liquid separation; and washing theobtained solid phase, drying the solid phase, and then, roasting the solid phase to obtain the manganese oxide catalyst. The manganese oxide catalyst is prepared by taking urea as a precipitant and using a uniform coprecipitation method; the obtained catalyst has the advantages such as high selectivity, high activity, high stability, low ignition temperature and long service life when being usedfor catalytic combustion of ethyl acetate; and compared with an existing noble metal catalyst, the manganese oxide catalyst is higher in catalytic activity, lower in catalysis temperature range, widein material source, simple in preparation process, high in economic benefit and wide in application prospect.

Description

Technical field [0001] The invention relates to the technical field of catalyst preparation and air pollution purification, in particular to a manganese oxide catalyst and a preparation method and application thereof. Background technique [0002] At present, with the increase in the intensity of human industrial activities, a large amount of volatile organic compounds (Volatile Organic Compound, VOCs) are discharged into the atmosphere, causing environmental pollution through a series of chemical reactions. For example, some highly active VOCs can react photochemically with another atmospheric pollutant, nitrogen oxides (NOx), causing the surface ozone concentration to rise, forming photochemical smog pollution; some VOCs with low vapor pressure can also nucleate and grow through a complex process Form secondary organic aerosol, and secondary organic aerosol is an important part of fine particulate matter PM2.5. It can be seen that VOCs are important precursors for the formatio...

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Problems solved by technology

[0007] The above-mentioned supported noble metal catalysts are expensive, and without large-scale promotion, the catalytic efficiency is not ideal when catalyzing the decomposition of ethyl acetate, and it needs to be carried out effectively at a higher temperature (>300°C), so it needs to be developed at a low cost and stable A new catalyst for the efficient catalytic combustion of ethyl acetate

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