A kind of low-temperature denitrification synergistic desulfurization activated carbon catalyst and preparation method thereof

Abstract

The invention discloses a low-temperature denitration and synergetic desulfurization active carbon catalyst and a preparation method thereof. The catalyst takes SnCl4 and V2O5 as active components, active carbon as a carrier and FeO3 and CeO2 as assistants. The preparation method comprises the following steps: weighing a certain mass of active carbon, soaking with deionized water and washing to remove surface impurities; dissolving ammonium metavanadate, ferric nitrate and cerium nitrate in room temperature to obtain a transparent solution; putting washed active carbon into the prepared solution, soaking, and carrying out water bath heating and rotating evaporation until water is completely evaporated; drying and roasting the active carbon to obtain the catalyst. The mass ratio of components of the catalyst is as follows: SnCl4:V2O5:Fe2O3:CeO2:active carbon is equal to (0.1-1.0):(0.08-1.25):(1.02-7.92):(0.8-7.92):100. According to the catalyst, in the temperature scope of 70-200 DEG C, the purification efficiency of nitrogen oxide can be more than 85%; the sulfur capacity is 36mg / g; meanwhile, the catalyst has good water vapor resistance and sulfur poisoning resistance and can adapt to a strict environment protection regulation requirement; compared with the prior art, the low-temperature denitration and synergetic desulfurization active carbon catalyst has the advantages that the synergetic denitration and desulfurization effects are greatly improved and the operation cost can be remarkably lowered.

Description

Technical field [0001] The invention belongs to the technical field of exhaust gas treatment, and relates to NO in exhaust gas x , SO 2 The treatment specifically relates to a low-temperature denitration synergistic desulfurization activated carbon catalyst and a preparation method thereof. Background technique [0002] At present, my country’s energy structure is dominated by fossil fuels such as coal and petroleum. The flue gas emitted by their combustion contains sulfur oxides, SO. x (Including SO 2 , SO 3 ) And NO x (Including NO, NO 2 Etc.), where SO 2 , NO and NO 2 It is the main component of air pollution and the main substance that forms acid rain. In recent years, with economic development and the improvement of living standards, people have paid more and more attention to environmental pollution. The country has also formulated relevant policies and regulations requiring coal-fired boilers and coal-fired power plants to simultaneously control SO 2 And nitrogen oxide emi...

AI Technical Summary

Problems solved by technology

Researchers at home and abroad have reported that V 2 o 5 Modified activated carbon has high denitrification efficiency, but its applicable temperature is generally above 180 °C, and the denitrification efficiency of modified activated carbon is easily affected by SO 2 effect, at lower temperatures SO 2 The denitrification efficiency drops significantly in the presence of

At present, there is no report on the modified activated carbon that can adapt to the temperature of 180°C or even lower and has high simultaneous denitrification and desulfurization efficiency.

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