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A kelp-shaped mn-fe double metal oxide loaded ceo 2 Catalyst and preparation method and application

A bimetallic oxide and catalyst technology, applied in the field of flue gas denitrification, can solve the problems of low selectivity of supported denitrification catalysts, difficult fixation of active components, narrow catalyst activity window, etc. The effect of wide active temperature range

Active Publication Date: 2020-09-18
CHANGZHOU UNIV
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Problems solved by technology

[0005] The present invention aims at the low selectivity, poor specificity, inhomogeneity, poor stability and low efficiency of the existing loaded denitration catalyst, the active components are not easy to be fixed on the catalyst carrier, and the catalyst activity window is narrow in the actual use of the flue gas pipeline. , low temperature activity and anti-SO 2 Poor performance and other shortcomings, a hydrothermal-calcination method is provided to prepare kelp-shaped Mn-Fe double metal oxide-supported CeO 2 Preparation method of low-temperature flue gas denitrification catalyst

Method used

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  • A kelp-shaped mn-fe double metal oxide loaded ceo <sub>2</sub> Catalyst and preparation method and application
  • A kelp-shaped mn-fe double metal oxide loaded ceo <sub>2</sub> Catalyst and preparation method and application
  • A kelp-shaped mn-fe double metal oxide loaded ceo <sub>2</sub> Catalyst and preparation method and application

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Embodiment 1

[0029] (1) 1.5g manganese acetate and 2.5g ferric sulfate were dissolved in deionized water respectively, and ultrasonically dispersed to obtain manganese acetate solution and ferric sulfate solution;

[0030] (2) Mix the manganese acetate solution obtained in step (1) with the ferric sulfate solution, and add 1.6 g of urea and magnetically stir for 0.5 h at room temperature to obtain a mixed solution;

[0031] (3) Add ammonia solution dropwise to the mixed solution prepared in step (2) while stirring, adjust to pH=10, and continue stirring for 3 h.

[0032] (4) The mixed solution obtained in step (3) was transferred to a polytetrafluoroethylene hydrothermal kettle with a volume capacity of 100 ml and reacted at 90° C. for 6 h. suction filtration, washing and drying to obtain the pleated kelp-shaped Mn-Fe composite oxide catalyst precursor.

[0033] (5) Take the catalyst in step (4), dissolve it in 200ml deionized water, add 1.9g of Ce(NO 3 ) 3 ·6H 2 O, also adjust the pH ...

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Abstract

The invention belongs to the field of flue gas denitrification, in particular to a kelp-shaped Mn-Fe double-metal oxide loaded CeO2 low-temperature flue gas denitrification catalyst, provides a preparation method of the kelp-shaped Mn-Fe double-metal oxide loaded CeO2 low-temperature flue gas denitrification catalyst, and aims to solve the problems that an existing loaded denitrification catalystis low in selectivity and efficiency, poor in specificity, nonuniform and bad in stability, active components are not easily fixed on catalyst carriers, active windows of the catalyst are narrow in actual use of flue gas pipelines and easily poisoned by SO2 and the like. A wrinkled kelp-shaped Mn-Fe double-metal oxide is prepared by a hot water-calcination method and serves as a carrier, the Mn-Fedouble-metal oxide can also serve as a low-temperature active component, CeO2 particles are loaded on the oxide to improve sulfur resistance, and the catalyst is an environmental-friendly NH3-SCR denitrification catalyst with a great application prospect.

Description

technical field [0001] The invention belongs to the field of flue gas denitration, in particular to a kelp-shaped Mn-Fe double metal oxide loaded CeO 2 Low temperature flue gas denitrification catalyst. Background technique [0002] With the rapid increase in the number of global vehicles and the burning of fossil fuels, NO x (NO / N 2 O / NO 2 ) emissions are increasing year by year. Cause acid rain, chemical smog and many other environmental problems, causing great pollution to people's living environment. Therefore, chemical methods are used to treat NO emitted in the environment x (NO / N 2 O / NO 2 ), making it a non-toxic N 2 Change is very important. Selective catalytic reduction (selective catalytic reduction, SCR) is the most widely used flue gas denitrification technology in the world today. The method uses NH 3 As a reducing agent, reducing NOx to N 2 . At present, the most widely used denitrification catalysts in power plants are V-W-Ti series catalysts, whi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/889B01D53/90B01D53/56
CPCB01D53/8628B01D53/90B01D2255/2065B01D2255/2073B01D2255/20738B01D2258/0283B01J23/8892
Inventor 罗士平黄晓艳谢爱娟唐毅然姚超李霞章
Owner CHANGZHOU UNIV
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