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Porous honeycomb type denitration catalyst for ship denitration, preparation method and application thereof

A technology of denitrification catalyst and porous catalyst, which is applied in the application fields of porous honeycomb denitrification catalyst for ship denitrification and its preparation, and flue gas denitrification. Resistant to pulverization and high catalytic efficiency

Inactive Publication Date: 2015-08-05
NANTONG YATAI ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a porous honeycomb denitrification catalyst for ship denitrification and its preparation method and application, so that it can meet the needs of ship diesel engine denitrification, so as to solve the problem that existing diesel engine catalysts and industrial catalysts cannot meet the needs of marine high-power catalysts. The need for denitrification of diesel engine exhaust

Method used

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  • Porous honeycomb type denitration catalyst for ship denitration, preparation method and application thereof
  • Porous honeycomb type denitration catalyst for ship denitration, preparation method and application thereof
  • Porous honeycomb type denitration catalyst for ship denitration, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Preparation of ammonium metavanitate solution

[0032] Add 80 liters of deionized water and 12 kg of monoethanolammonium into the ammonium metavanamate dissolving tank, heat it to 100°C by steam, then add 10 kg of ammonium metavanamate and 56 kg of ammonium metatungstate, turn on the low-speed rotary stirring, and continue The mixed liquid is heated by steam until the temperature of the ammonium metavanate dissolution tank is 98° C. and aged at this temperature for 30 minutes.

Embodiment 2

[0034] Catalyst preparation

[0035] kneading

[0036] Primary mixing: Add 390kg of anatase-type titanium dioxide into the powerful mixing machine, rotate the rotor at a low speed at 350 rpm, and run the mixing machine. Then, 2.0 kg of stearic acid, 31.5 kg of short fibers, 6.5 kg of lactic acid with a mass concentration of 50%, 230 liters of deionized water and 45 liters of ammonia water with a mass concentration of 20% were added, and the above materials were mixed and kneaded. The kneading process was to run the kneader for 15 minutes by high-speed rotation of the rotor.

[0037] Secondary mixing: After the first mixing, a certain amount of 200 kg of anatase titanium dioxide is added to the mixing machine together with 18 liters of deionized water and 8 liters of ammonia water with a mass concentration of 20%, and the second mixing is carried out. Run at high speed. When the temperature of the mixed material reaches 95°C (about 1 hour), open the exhaust valve of the knea...

Embodiment 3

[0074] Catalyst preparation

[0075] kneading

[0076] Primary mixing: Add 350kg of anatase-type titanium dioxide into the powerful kneading machine, rotate the rotor at a low speed at 350 rpm, and run the kneading machine. Then, 1.5 kg of stearic acid, 35 kg of short fibers, 4.0 kg of lactic acid with a mass concentration of 50%, 200 liters of deionized water and 50 liters of ammonia water with a mass concentration of 20% were added, and the above materials were mixed and kneaded. The kneading process was to run the kneader for 15 minutes by high-speed rotation of the rotor.

[0077] Secondary mixing: After the first mixing, a certain amount of 225 kg of anatase titanium dioxide is added to the mixing machine together with 20 liters of deionized water and 10 liters of ammonia water with a mass concentration of 20%, and the second mixing is carried out. Run at high speed. When the temperature of the mixed material reaches 95°C (about 1 hour), open the exhaust valve of the k...

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PUM

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Abstract

The invention provides a porous honeycomb type denitration catalyst for ship denitration, a preparation method and application thereof. The preparation method includes mixing, aging, drying and roasting steps. The mixing step includes adding titanium dioxide, stearic acid, deionized water, ammonia water, lactic acid, glass fiber, short fiber and ammonium metavanadate, an ammonium metatungstate solution, hydroxypropyl methyl cellulose and polyethylene oxide into a mixing roll to conduct high speed mixing for over 7 hours. The catalyst provided by the invention can meet the demands of marine high power diesel engine exhaust gas denitration. The denitration catalyst prepared by the catalyst preparation method provided by the invention has the advantages of high compression strength, difficult pulverization, long service life, easy molding and demoulding in the making process, ideal porosity, high catalytic efficiency, low catalyst dosage, and low cost, etc.

Description

technical field [0001] The invention belongs to the technical field of denitrification of ships, and particularly relates to a porous honeycomb denitrification catalyst for denitrification of ships, a preparation method thereof and an application in flue gas denitrification. Background technique [0002] At present, marine high-power diesel engines have large exhaust emissions, and denitrification requires sufficient reaction area and reaction residence time to ensure the conversion efficiency of the reaction. If a catalyst of a conventional size is used, the amount required is too much. Although the existing industrial large-scale catalysts can meet the needs of marine high-power diesel engine tail gas denitrification in terms of space velocity, their pore size is too large and the conversion efficiency is too low. None of the existing diesel engine catalysts and industrial catalysts can meet the needs of marine high-power diesel engine tail gas denitrification. Contents ...

Claims

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Application Information

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IPC IPC(8): B01J23/30B01J35/10B01D53/94B01D53/56
Inventor 董勇王德荣顾文才
Owner NANTONG YATAI ENG TECH
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