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Preparation method of denitration catalyst cellular module

A technology of denitrification catalyst and honeycomb, which is applied in the field of preparation of honeycomb ceramic catalyst materials, can solve the problems of small specific surface area of ​​powder, high conversion rate of sulfur resistance, poor hardness, etc., achieve good conversion rate of sulfur resistance, large specific surface area, and use long life effect

Inactive Publication Date: 2012-10-17
CHANGCHUN XINRUI TECH & TRADE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the traditional process, the hardness is poor, resulting in a relatively short life; the powder produced by the traditional method has a small specific surface area and a relatively high conversion rate of sulfur resistance, resulting in a relatively low denitrification efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Take 1kg of V2O5-WO3 / TiO2-ZrO2 main powder; the auxiliary material is clay, the quality is 0.08kg; the binder is methyl cellulose, the quality is 0.02kg; the plasticizer is polyethylene glycol, the quality is 0.01kg; Thoroughly mix the above-mentioned solid phase powder in a mixer. Put the mixed solid phase powder into the kneader, add water for kneading, the amount of water added is 0.46kg, after kneading fully for 2 hours, add 0.22kg of lubricant glycerin; continue kneading for 2 hours, take it out. Put the kneaded mud embryo body into a sealed plastic device, put it in a cool place for aging, and the aging time is 24 hours, during which the mud is mixed and extruded twice. Carry out the vacuum mixing of the mud after mixing in the vacuum mixer for 2 times to obtain the honeycomb ceramic precursor mud, and put the prepared honeycomb ceramic catalyst precursor mud into the honeycomb ceramic extruder to extrude Out of shape. The formed honeycomb ceramic catalyst is ...

Embodiment 2

[0021] Take V2O5—WO3 / TiO2—ZrO2 main powder 1kg; the auxiliary material is glass fiber, the quality is 0.1kg; the binder is methyl cellulose, the quality is 0.025kg; the plasticizer is polyethylene glycol, the quality is 0.015kg ; Fully mix the above-mentioned solid phase powder in the mixing machine. Put the mixed solid phase powder into the kneader, add water for kneading, the amount of water added is 0.55kg, after fully kneading for 2 hours, add 0.25kg of lubricant triethanolamine; continue kneading for 1 hour, take it out. Put the kneaded mud embryo body into a sealed plastic device, put it in a cool place for aging, and the aging time is 26 hours, during which the mud is mixed and extruded twice. Carry out 3 times of vacuum mixing in the vacuum mixing machine with the mud after mixing to obtain the honeycomb ceramic precursor mud, and put the prepared honeycomb ceramic catalyst precursor mud into the honeycomb ceramic extruder to extrude Out of shape. The formed honeyc...

Embodiment 3

[0023] Take V2O5—WO3 / TiO2—ZrO2 main powder 1kg; the auxiliary material is pottery clay, the mass is 0.11kg; the binder is hydroxypropyl cellulose, the mass is 0.03kg; the plasticizer is polyethylene glycol, the mass is 0.02kg ; Fully mix the above-mentioned solid phase powder in the mixing machine. Put the mixed solid phase powder into the kneader, add water for kneading, the amount of water added is 0.61kg, after fully kneading for 2 hours, add 0.28kg of lubricant glycerin; continue kneading for 3 hours, take it out. Put the kneaded mud embryo body into a sealed plastic device, put it in a cool place for aging, and the aging time is 28 hours, during which the mud is mixed and extruded once. Carry out the vacuum mixing of the mud after mixing in the vacuum mixer for 2 times to obtain the honeycomb ceramic precursor mud, and put the prepared honeycomb ceramic catalyst precursor mud into the honeycomb ceramic extruder to extrude Out of shape. The formed honeycomb ceramic cat...

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Abstract

The invention relates to a preparation method of a denitration catalyst cellular module. Main powdery materials V2O5-WO3 / TiO2-ZrO2, pottery clay or glass fiber, binder, plasticizer solid-phase powder are well mixed; the mixture is added into a kneading machine; water is added into the kneading machine, and the mixture is kneaded; a lubricating agent with a weight 0.2-0.3 times that of the main powdery materials is added to the mixture, and kneading is continued for 1-3h; a well kneaded pug blank is added into a sealing plastic apparatus, and is subjected to aging in a cool shade; the mixed pug is subjected to 2-3 times of vacuum mixing, such that a cellular ceramic precursor pug is obtained; the cellular ceramic precursor pug is shaped by extrusion by using a cellular ceramic extruding machine; the shaped material is subjected to curve drying in a constant-temperature constant-humidity drying cabinet; the dried cellular ceramic module is baked for 3h under a temperature of 600 DEG C in a high-temperature calcining machine; the modules are cooled and the obtained products are trimmed, such that a cellular ceramic catalyst finished product is obtained. Experimental effects of the cellular ceramic catalyst are better than those of common cellular ceramic catalyst products in the market. The cellular ceramic catalyst provided by the invention has higher denitration rate, larger specific surface area, better sulfur conversion resistance rate, and longer service life.

Description

technical field [0001] The invention relates to a method for preparing a honeycomb ceramic catalyst material, in particular to a method for preparing a honeycomb ceramic using TiO2 and ZrO2 as a novel mixed carrier. Background technique [0002] The pollution problem of nitrogen oxides (NOX) has been paid attention to and controlled by countries all over the world in recent years. With the development of my country's economy, environmental problems have attracted more and more attention. The market application of denitrification catalysts is also becoming more and more common. [0003] At present, the mainstream SCR denitration catalyst molding modules in the international market mainly include three types: honeycomb type, plate type and corrugated type, and honeycomb type ceramic catalysts are widely used. However, due to the traditional process, the hardness is poor, resulting in a relatively short life; the powder produced by the traditional method has a small specific s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/30B01J35/04B01D53/86B01D53/56
Inventor 华雪王慧忠
Owner CHANGCHUN XINRUI TECH & TRADE
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