Flue gas denitration catalyst and preparation method thereof

A denitration catalyst and flue gas technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, chemical elements of heterogeneous catalysts, etc., can solve the problems of high production cost and low denitration efficiency, so as to reduce treatment costs and improve Denitrification efficiency, effect from a wide range of sources

Pending Publication Date: 2022-02-01
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the problems of generally low denitrification efficiency and high production cost in the prior art, the present invention provides a flue gas denitrification catalyst and its preparation method

Method used

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  • Flue gas denitration catalyst and preparation method thereof
  • Flue gas denitration catalyst and preparation method thereof
  • Flue gas denitration catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 30g of unground vanadium extraction tailings by adding 300ml of nitric acid solution with a mass fraction of 4%; magnetically stir in a water bath at 60°C for two hours, and let stand for 12h; then add 25% ammonia water until pH=8, Stop adding ammonia water, and stir and age in a water bath at 60°C for 1h. The obtained liquid was suction filtered, and the filter cake obtained by suction filtration was dried at 105°C, and then the obtained tailings were calcined at a heating rate of 10°C / min to 500°C in an air atmosphere for 2 hours, and the cooling condition was natural furnace cooling. 20 g of the tailings obtained after calcining were added to 4 ml of a binder with a mass fraction of 4%, that is, an aqueous solution of polyvinyl alcohol, and mixed to obtain a mixture. The resulting mixture was extruded by a powder tablet press, and the molding strength during the extrusion process was 6 MPa; the catalyst sample obtained by the tablet was dried at 105° C., and then...

Embodiment 2

[0039] Other conditions are the same as in Example 1, except that a sulfuric acid solution with a mass fraction of 4% is added to the acid digestion process. The testing conditions are the same as those in Example 1. The testing results show that the optimal denitration temperature of the denitration catalyst prepared in this example is 300-400° C., and the denitration efficiency is 80.6%.

Embodiment 3

[0041] Other conditions are the same as in Example 1, except that a hydrochloric acid solution with a mass fraction of 4% is added to the acid digestion process. The testing conditions are the same as those in Example 1. The testing results show that the optimal denitration temperature of the denitration catalyst prepared in this example is 300-400° C., and the denitration efficiency is 80%.

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Abstract

The invention relates to a flue gas denitration catalyst and a preparation method thereof. The preparation method comprises the following steps: carrying out acid digestion alkali precipitation treatment on vanadium extraction tailings, filtering, calcining, mixing the calcined tailings with a binder to obtain a mixture, carrying out extrusion molding on the mixture, and drying and crushing to obtain the catalyst. According to the preparation method of the flue gas denitration catalyst provided by the invention, vanadium extraction tailings are subjected to acid digestion alkali precipitation, so that the requirement of an industrial catalyst can be met with fewer treatment processes, the prepared denitration catalyst greatly improves the denitration efficiency, the flue gas denitration efficiency can reach 95%, the catalyst can replace a part of vanadium-titanium denitration catalysts, the flue gas treatment cost is reduced, accumulated industrial solid waste is treated, the treatment cost of industrial flue gas treatment can be reduced, and the production benefits of enterprises are greatly improved.

Description

technical field [0001] The invention relates to a flue gas denitrification catalyst and a preparation method thereof, belonging to the technical field of catalyst preparation. Background technique [0002] Vanadium extraction tailings are the residue obtained after calcification or sodium roasting, leaching and extraction of vanadium, which is black powder. On the one hand, the vanadium extraction process will cause non-water-soluble ions such as chromium ions and vanadium ions to remain in the tailings, leaving some hidden dangers to environmental safety; and the high content of alkali metals in the waste residues is not conducive to the comprehensive utilization of tailings . On the other hand, my country's iron and steel industry produces nearly 1 million vanadium-extracting tailings every year, resulting in a large amount of metal resources in the tailings not being utilized and being wasted, resulting in resource waste and environmental pollution to a large extent. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01D53/86B01D53/56
CPCB01J23/8892B01J23/002B01D53/8628B01J2523/00B01D2257/404B01D2258/0283B01J2523/23B01J2523/41B01J2523/47B01J2523/55B01J2523/67B01J2523/72B01J2523/842B01J2523/12
Inventor 姜涛邹志雪杨广东温婧李林陈泊键赵涛
Owner NORTHEASTERN UNIV
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