Composite denitrification catalyst loaded with amino compounds, preparation method and application thereof

Abstract

The present invention relates to a composite denitrification catalyst loaded with amine-based compounds and its preparation method and application. The denitrification agent is prepared from raw materials with the following components and weight percent content: 50-90% of carrier, 5-25% of metal oxide, amine-based Compound 5-25%, weigh the carrier and the metal inorganic salt precursor, use the equal volume impregnation method, impregnate the carrier in the aqueous solution of the metal inorganic salt, stir, dry, and pass through nitrogen for calcination, weigh the amino compound and Dissolving, immersing the calcined solid sample in the aqueous solution of the amino compound, standing still, and drying to obtain the composite denitration catalyst. The prepared composite catalyst is packed in a fixed-bed reactor, and the normal-pressure flue gas is passed through for denitrification. The present invention has the characteristics of economy, energy saving, environmental friendliness, high denitrification efficiency, recyclable loading of amino compounds, and reuse. It is suitable for the field of low-temperature denitrification of stationary sources.

Description

technical field [0001] The invention relates to a denitration catalyst and its preparation and application method, in particular to a composite denitration catalyst loaded with an amine compound and its preparation method and application. Background technique [0002] NO x As one of the main pollutants in the atmosphere, it can cause a series of environmental problems such as acid rain, photochemical smog, ozone layer destruction and greenhouse effect, and pose a huge threat to human health and the ecological environment. At present, the selective catalytic reduction reaction (SCR) method is widely used in the industry, and V 2 o 5 -WO 3 / TiO 2 as catalyst, with NH 3 As a reducing agent, it removes nitrogen oxides in flue gas at a temperature range of 300-400 °C. However, this technology has some obvious disadvantages, such as the strong corrosiveness of the reducing agent liquid ammonia or ammonia water, which requires high pipeline equipment; NH 3 It is difficult to...

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Problems solved by technology

[0006] Obviously, the low-temperature urea-SCR activity of the above-mentioned Ni and Ce metal oxides is still low; and the solubility of melamine in water is extremely low, resulting in its content in the catalyst being less than 1%, resulting in the frequent regeneration of the catalyst

However, composite catalysts with high-efficiency denitrification active metal oxide active components and reductant components with a wide reaction temperature range are among the supported denitration catalysts that use solid nitrogen-containing compounds as reductants Among the research results, there is no public report yet