FeMnO2 nanotube as well as preparation method and application thereof

Abstract

The invention provides a FeMnO2 nanotube as well as a preparation method and application thereof, and the preparation method comprises the following steps: step 1, adding KMnO4 and FeSO4 into water, conducting stirring, then adding HCl, conducting stirring to obtain a reaction solution, and then carrying out hydrothermal reaction on the reaction solution at 100-180 DEG C for 8-20 hours; and step 2, after the hydrothermal reaction is completed, filtering, washing and drying a product to obtain the FeMnO2 nanotube denitration catalyst. The catalyst has high sulfur resistance and high N2 selectivity, can be used for selective catalytic reduction of nitrogen oxide waste gas with high SO2 content in the steel industry, and is simple in preparation method.

Description

technical field [0001] The invention relates to the preparation of a denitration catalyst, specifically a FeMnO 2 Nanotubes and methods of preparation and applications thereof. Background technique [0002] Nitrogen oxides (NOx) in the atmosphere mainly come from the combustion process of fossil fuels, which exist in various forms, mainly nitrogen monoxide (NO) and nitrogen dioxide (NO 2 ). In the combustion process, no matter how the reaction conditions of the reactor are changed, the exhaust gas contains a certain amount of NOx. In recent years, NOx emission standards have become increasingly stringent. How to economically and effectively control NOx emissions has become an important issue that must be solved in the field of air pollution control. At present, the commonly used flue gas denitrification methods include dry denitrification and wet denitrification. Among them, dry denitrification is divided into selective catalytic reduction (Selective Catalytic Reduction,...

AI Technical Summary

Problems solved by technology

In addition, MnO 2 catalysts because they interact with SO 2 The reaction produces MnSO 4 Precipitation leads to inactivation of the active sites and thus poor sulfur resistance

Although many studies have been devoted to improving the N of Mn-based catalysts 2 Selectivity, but other preparation methods are more complicated and difficult to produce on a large scale commercially

[0008] Patent document CN201710268297 discloses a Fe-MnO 2 The preparation method of the catalyst, but the catalyst is aimed at the removal of VOCs; and, the preparation method needs to add Mn(II) salt first, and then add KMnO 4 , the process is cumbersome, the reaction time is long, and it uses 66% nitric acid, which has strong acidity, large usage, low safety, more waste water during post-treatment, and high post-treatment cost

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