Core-shell type microwave catalyst as well as preparation method and application thereof

Abstract

The invention provides a core-shell type microwave catalyst which comprises a MoCx core structure and a ZrO2 shell structure coated outside the MoCx core structure, and the catalyst is a MoC-Mo2C-coated ZrO2 catalyst. The invention also correspondingly provides a preparation method of the catalyst, which comprises the following steps: firstly preparing carbon-containing molybdenum dioxide, then carrying out hydrolysis and condensation polymerization reaction on the carbon-containing molybdenum dioxide, water and zirconium n-butoxide, and drying and roasting the solid obtained by the reaction to obtain the catalyst. The invention provides the catalyst with a brand new structure, and the catalyst is low in cost and good in wave absorbing performance; the preparation conditions are mild, the preparation period is short, the operation steps are short and safe, and high-efficiency direct decomposition of hydrogen sulfide can be realized at a relatively low reaction temperature.

Description

technical field [0001] The invention belongs to the field of catalysts, and in particular relates to a core-shell type microwave catalyst, a preparation method and application thereof. Background technique [0002] hydrogen sulfide (H 2 S) is a polluting gas that is harmful to human health and the environment, except for a relatively small amount of natural sources, mainly from the chemical industry (>4×10 7 t every year). In the future, with the increase of heavy oil refining, H 2 Production of S is expected to increase further and must be removed or reduced to acceptable levels. On the other hand, from the perspective of sustainable energy production, H 2 S is considered a good resource due to its special elemental composition. Therefore, seeking to effectively deal with H 2 The way to s and convert it into a high-value product is critical. [0003] At present, the Claus method is often used in industry to treat H 2 S waste gas, but the process will inevitably h...

AI Technical Summary

Problems solved by technology

[0007] For CoS-MoS 2 / γ-Al 2 o 3 For microwave catalysts, although H 2 The conversion rate of S has been significantly improved, but the catalytic activity is still not high at low temperature

For the Mo2C@BN core-shell microwave catalyst, the microwave catalysis at low temperature directly decomposes H 2 The catalytic activity of S is already very good, but the preparation conditions of the catalyst are relatively high, which also limits the large-scale application of the catalyst

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