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Denitration catalyst and its preparation method

A denitrification catalyst and binder technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., to achieve the effect of wide source of raw materials, low manufacturing cost, and efficient comprehensive utilization

Active Publication Date: 2018-12-18
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is no report on the technology of using vanadium removal tailings to prepare denitrification catalyst

Method used

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  • Denitration catalyst and its preparation method
  • Denitration catalyst and its preparation method
  • Denitration catalyst and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0040] 98 parts by weight of vanadium extraction tailings with a particle size of 0.1-0.2 mm, 2 parts by weight of aluminum dihydrogen phosphate and water are mixed for 2 hours to obtain a mixture; the mass content of water in the mixture is 3%;

[0041] Extruding the mixture using an extrusion molding machine, and the molding strength during the extrusion molding process is 5 MPa to obtain a green body;

[0042] The green body is dried at 110° C. and then sintered at 500° C. to form a denitration catalyst.

[0043] According to GB T 5072-2208 "Test Method for Compressive Strength of Refractories at Normal Temperature", the denitration catalyst prepared in Example 1 of the present invention was tested for compressive strength. The test result is that the denitration catalyst prepared in Example 1 of the present invention has a pressure resistance The strength is 8.2MPa.

[0044] The denitration efficiency of the denitration catalyst prepared in Example 1 of the present invention was t...

Embodiment 2

[0051] 95 parts by weight of vanadium extraction tailings with a particle size of 0.1-0.2 mm, 5 parts by weight of aluminum dihydrogen phosphate and water are mixed for 5 hours to obtain a mixture; the mass content of water in the mixture is 5%;

[0052] Extruding the mixture using an extrusion molding machine, and the molding strength during the extrusion molding process is 5 MPa to obtain a green body;

[0053] The green body is dried at 110° C. and then sintered at 500° C. to form a denitration catalyst.

[0054] According to the method described in Example 1, the compressive strength of the denitration catalyst prepared in Example 2 of the present invention was tested to be 8.2MPa, the optimal denitration temperature was 300-400°C, and the denitration efficiency was 48.5%.

Embodiment 3

[0056] 98 parts by weight of vanadium extraction tailings with a particle size of 0.1-0.2 mm, 2 parts by weight of aluminum dihydrogen phosphate and water are mixed for 3 hours to obtain a mixture; the mass content of water in the mixture is 3%;

[0057] Extruding the mixture using an extrusion molding machine, and the molding strength during the extrusion molding process is 3 MPa to obtain a green body;

[0058] The green body is dried at 110° C. and then sintered at 200° C. to form a denitration catalyst.

[0059] According to the method described in Example 1, the compressive strength of the denitration catalyst prepared in Example 3 of the present invention was tested to be 4.5 MPa, the optimal denitration temperature was 300-400° C., and the denitration efficiency was 55.5%.

[0060] It can be seen from the above examples that the present invention provides a method for preparing a denitration catalyst, including: mixing vanadium extraction tailings, a binder, and water to obtain ...

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Abstract

The invention provides a preparation method of a denitration catalyst. The method comprises the following steps: mixing vanadium extraction tailings, a binder and water to obtain a mixture; carrying out extrusion molding on the mixture to obtain a green body; and drying the green body, and sintering the dried green body to obtain the denitration catalyst. Compared with the conventional V-Ti-basedcatalysts, the denitration catalyst provided by the invention has the advantages of wide sources of raw materials, low manufacturing cost, and realization of efficient and comprehensive utilization ofwaste residue resources. The denitration catalyst has a denitration efficiency reaching 50%, can be applied to a flue gas denitration project of original flue gas with low nitrogen oxides under current increasingly-strict environmental protection standards, and meets current standard requirements. The invention also provides the denitration catalyst prepared by the method.

Description

Technical field [0001] The invention relates to the technical field of catalysts, in particular to a denitration catalyst and a preparation method thereof. Background technique [0002] Panzhihua Iron and Steel produces 350,000 tons of vanadium extraction tailings every year, which is difficult to use as resources. Fe is contained in vanadium extraction tailings 2 O 3 , TiO 2 , V 2 O 5 , MnO 2 And other active components. The researchers of Chongqing University used vanadium extraction tailings as raw materials and adjusted the components to make flue gas denitration catalyst materials; Northeastern University researchers used vanadium extraction tailings as the main raw materials to develop titanium-based photocatalytic materials and achieved certain results. Some existing scientific research units use vanadium extraction tailings as the main raw material to develop catalyst materials for wastewater treatment, and have achieved good results in the field of wastewater treatment....

Claims

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Application Information

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IPC IPC(8): B01J23/889B01J37/08B01D53/86B01D53/56
CPCB01D53/8628B01D2258/0283B01J23/8892B01J37/0018
Inventor 郝建璋黎建明曾冠武
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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