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A honeycomb waste gas denitrification catalyst

A denitrification catalyst and catalyst technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of green body cracking, excessive addition, and reduced yield, so as to reduce cracking and reduce Dosage, the effect of increasing the firing rate

Active Publication Date: 2016-04-13
ZHONGAN QINGHUA HEBEI ENERGY SAVING ENVIRONMENTAL ENG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Many honeycomb denitrification patents in the prior art mention methyl cellulose or hydroxypropyl methyl cellulose as binders and water retaining agents, but the above two celluloses need to be added in large amounts, but the amount added is too much , during the drying and firing process, it will cause the body to crack and reduce the yield

Method used

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  • A honeycomb waste gas denitrification catalyst
  • A honeycomb waste gas denitrification catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh various components according to the following proportions:

[0031] Titanium dioxide powder: 83 parts;

[0032] Tungsten trioxide: 8 parts;

[0033] Vanadium pentoxide: 1.5 parts;

[0034] Silicon dioxide: 1.5 parts;

[0035] Fiberglass: 6 parts;

[0036] Stearic acid: 1 part;

[0037] RP-CHOP fiber: 0.5 parts;

[0038] Aminocellulose: 0.3 parts.

[0039] Mix the powders other than silica evenly first, then mix the silica sol with water evenly, and mix with various powders. The mud is stale, extruded, dried, fired, cut, and packaged. The finished honeycomb exhaust gas catalyst is obtained.

Embodiment 2

[0041] Weigh various components according to the following proportions:

[0042] Titanium dioxide powder: 84 parts;

[0043] Tungsten trioxide: 5 parts;

[0044] Vanadium pentoxide: 1 part;

[0045] Silicon dioxide: 5 parts;

[0046] Fiberglass: 5 parts;

[0047] Stearic acid: 0.5 part;

[0048] RP-CHOP fiber: 1 part;

[0049] Aminocellulose: 0.5 parts.

[0050] Mix the powders other than silica evenly first, then mix the silica sol with water evenly, and mix with various powders. The mud is stale, extruded, dried, fired, cut, and packaged. The finished honeycomb exhaust gas catalyst is obtained.

Embodiment 3

[0052] Weigh various components according to the following proportions:

[0053] Titanium dioxide powder: 80 parts;

[0054] Tungsten trioxide: 8 parts;

[0055] Vanadium pentoxide: 2 parts;

[0056] Silicon dioxide: 5 parts;

[0057] Fiberglass: 5 parts;

[0058] Stearic acid: 1 part;

[0059] RP-CHOP fiber: 0.5 parts;

[0060] Aminocellulose: 0.5 parts.

[0061] Mix the powders other than silica evenly first, then mix the silica sol with water evenly, and mix with various powders. The mud is stale, extruded, dried, fired, cut, and packaged. The finished honeycomb exhaust gas catalyst is obtained.

[0062] In order to investigate the influence of RP-CHOP fiber on various performances of the honeycomb denitration catalyst, the following comparative examples were made for comparison.

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Abstract

The invention relates to a honeycombed waste gas denitrification catalyst comprising the following components in parts by weight: 70-85 parts of titanium dioxide powder, 4-10 parts of tungstic oxide, 1-3 parts of vanadic oxide, 1-5 parts of silicon dioxide, 3-8 parts of glass fibers, 0.1-1 part of octadecoic acid, 0.1-1 part of polymer fibers and 0.1-1 part of aminocellulose. The raw materials are mixed according to weight parts and a sequence, and the catalyst is prepared by the following steps: performing aging and corrosion on the paste materials, performing extrusion molding, drying, firing, cutting and packaging to obtain the finished catalyst. By adding the polymer fibers and the aminocellulose, the yield of the catalyst is increased, the raw material cost of the catalyst is lowered and the deactivation resisting performance of the catalyst is improved.

Description

technical field [0001] The invention relates to a honeycomb waste gas denitrification catalyst, which belongs to the field of catalysts. Background technique [0002] Nitrogen oxides are one of the main pollutants in the atmosphere. Nitrogen oxides in the air can cause various hazards such as acid rain and photochemical smog. SO 2 The effect of governance, especially after 2012, many cities have experienced smog for many times, and nitrogen oxides are one of the main causes of smog weather. The increase of nitrogen oxides will increase the content of PM2.5 in the air A substantial increase. [0003] The national "Twelfth Five-Year Plan" has clearly included the control of the total amount of nitrogen oxides into the focus of environmental governance, and as a binding assessment indicator, it is required to reduce the total amount of nitrogen oxides emissions by 10% every year. At the same time, a series of nitrogen oxide control regulations have been issued, and strict ni...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/30B01J37/00B01J35/04B01D53/86B01D53/56
Inventor 马少丹姜海英任磊梅天放张雷许晶晶
Owner ZHONGAN QINGHUA HEBEI ENERGY SAVING ENVIRONMENTAL ENG TECH CO LTD
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