Low-temperature sulphur-resisting denitration catalyst and preparation method thereof

Abstract

The invention discloses a low-temperature sulphur-resisting denitration catalyst and preparation method thereof. The catalyst is formed by mixing the following components in weight percent: 1-15% of active site and 85-99% of a carbon-base carrier, wherein the active site is formed by mixing one or several of Ag2O, K2O, BaO, SnO2, Bi2O3 or PbO improved vanadium-base alloy oxides. The preparation method comprises the steps of mixing the active site and the carbon-base carrier to prepare the low-temperature sulphur-resisting denitration catalyst. Since the surface hydrophobic treatment is performed on the catalyst prepared by the invention, the situation that water molecules in the flue gas adhere to an open-framework structure of the catalyst to form capillary condensation or form sulfuric acid or ammonium sulfite with adsorbed NH3 and SO2 or SO3 to inactivate the catalyst is avoided.

Description

【Technical field】

[0001] The invention relates to the field of treatment of fossil fuel combustion tail gas, in particular to a low-temperature sulfur-resistant denitrification catalyst and a preparation method thereof. 【Background technique】

[0002] It is well known that nitrogen oxides (NO x ) is a harmful gas, the main air pollutant, not only can cause acid rain, photochemical smog, greenhouse effect and the destruction of the ozone layer; it can also cause serious water quality and soil quality deterioration, urban haze weather (PM2.5) and other environmental pollution problem, which poses a great threat to human health. 90% SO in air pollutants 2 and 70% NO x From the combustion of coal, the energy structure dominated by coal has led to a high total amount of air pollutant emissions. Potential environmental problems continue to emerge. Air pollution in the Yangtze River Delta, Pearl River Delta, and Beijing-Tianjin-Hebei region and other urban agglomerations has gra...

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