Manganese zirconium sulphate composite oxide catalyst as well as preparation method and application thereof

Abstract

The invention discloses a manganese zirconium sulphate composite oxide catalyst, which is characterized in that the composition of the manganese zirconium sulphate composite oxide catalyst is shown asMnxZr-SO42-(y), wherein x represents the mole ratio of Mn / (Mn+Zr); y represents the mole ratio of SO4<2-> / (Mn+Zr); x is greater than or equal to 0.25 and smaller than or equal to 0.75; y is greater than or equal to 0.2 and smaller than or equal to 0.6. The prepared catalyst can be used for removing oxynitrides. The catalyst is prepared by a citrate method; the preparation process is simple; the synergistic catalytic effect of SO4<2-> and manganese zirconium ingredients is achieved; good activity, nitrogen gas selectivity and sulfur poisoning resistant performance are realized; the active temperature window of the catalyst is expanded; the medium and low temperature denitration efficiency is high; the efficient catalytic removal of oxynitride and the nitrogen gas selectivity are realized in the wide temperature range; the selective catalytic reduction on oxynitrides has high efficiency.

Description

technical field [0001] The invention relates to a sulfated manganese-zirconium composite oxide catalyst and its preparation method and application, belonging to the technical field of nitrogen oxide catalytic reduction materials. Background technique [0002] Nitrogen oxide (NOx) is one of the main air pollutants, and it is also a major factor causing environmental problems such as acid rain, smog, and ozone destruction in various parts of my country. Its emission control has become a research hotspot in the field of environmental catalysis and atmospheric control. Ammonia selective catalytic reduction (Selective Catalytic Reduction, SCR) nitrogen oxides is currently the most widely used nitrogen oxide removal technology, and the key to SCR technology is an efficient and stable catalyst. [0003] At present, high-temperature SCR catalysts (300-400°C) are widely used in the thermal power industry. The flue gas temperature emitted by small and medium-sized coal-fired boilers,...

AI Technical Summary

Problems solved by technology

The flue gas temperature emitted by small and medium-sized coal-fired boilers, mainly glass furnaces, cement furnaces and metallurgical sintering furnaces, is generally at 120-300 °C, which is far lower than the active temperature of V / W / Ti catalysts with mature catalyst technology. As a result, non-electric industries do not have mature catalyst technology, and cannot carry out NOx emission reduction work in accordance with national emission standards

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