Denitration catalyst and preparation method thereof

A technology of denitrification catalyst and oxide, applied in the field of denitrification catalyst, can solve the problems of pollution and toxicity, and achieve the effect of expanding application range, high activity of out-of-stock, and non-toxic products

Inactive Publication Date: 2018-11-27
SHENZHEN JINGTE INTELLIGENT MFG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

V 2 o 5 / TiO2 series catalyst, its denitrification rate can reach more than 90% in industrial application, but V 2 o 5 Toxic, will produce pollution during production, use and disposal

Method used

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  • Denitration catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] S1. Preparation of Ti sol: Take 50wt% tetrabutyl titanate, 3.5wt% F127, and absolute ethanol, mix them and place them in a 50kHz ultrasonic wave and stir them for 2 hours. After stirring, take 6wt% deionized water and add them dropwise to the above Mix the solution and place it in a 50kHz ultrasonic wave to continue stirring for 0.5h;

[0030] S2. Immerse the honeycomb ceramics with a pore diameter greater than 50nm into the Ti sol treated in step S1 and place them together in an environment with a temperature of 10°C for 4 hours, then take out the foam ceramics and place them in a vacuum drying oven for 4 hours at a drying temperature of 105 °C, during the drying process, place the sample in a rotator and keep turning it up and down at a constant speed of 50 rpm, and repeat this step 3 times;

[0031] S3. Active material preparation: respectively 25wt% Fe(NO 3 ) 3 9H 2 O, 7wt%Ce(NO 3 ) 3 ·6H 2 O and 8wt%Sm(NO 3 ) 3 ·6H 2 O was dissolved in deionized water to m...

Embodiment 2

[0036] S1. Preparation of Ti sol: Take 70wt% tetrabutyl titanate, 0.5wt% F127, and absolute ethanol, mix them and place them in a 60kHz ultrasonic wave for 2.5 hours. After stirring, take 8wt% deionized water and add them dropwise to the above Mix the solution and place it in a 60kHz ultrasonic wave to continue stirring for 0.5h;

[0037] S2. Immerse the honeycomb ceramics with a pore diameter greater than 50nm into the Ti sol treated in step S1 and place them together in an environment with a temperature of 10°C for 5 hours, then take out the foam ceramics and place them in a vacuum drying oven for 6 hours at a drying temperature of 110°C. °C, during the drying process, place the sample in a rotator and keep turning it up and down at a constant speed of 60 rpm, and repeat this step 3 times;

[0038] S3. active material preparation: respectively 15wt% Fe(NO 3 ) 3 9H 2 O, 2wt%Ce(NO 3 ) 3 ·6H 2 O and 3wt%Sm(NO 3 ) 3·6H 2 O was dissolved in deionized water to make a mixe...

Embodiment 3

[0043] S1. Preparation of Ti sol: Mix 68wt% tetrabutyl titanate, 2wt% F127, and absolute ethanol respectively and place them in a 70kHz ultrasonic wave to stir for 3 hours. After stirring, add 10wt% deionized water to the above mixed solution drop by drop And placed in 70kHz ultrasonic wave to continue stirring for 1h;

[0044] S2. Immerse the honeycomb ceramics with a pore diameter greater than 50nm into the Ti sol treated in step S1 and place them together in an environment with a temperature of 20°C for 6 hours, then take out the foamed ceramics and place them in a vacuum drying oven for 8 hours at a drying temperature of 120°C °C, during the drying process, place the sample in a rotator and keep turning it up and down at a constant speed of 70 rpm, and repeat this step 3 times;

[0045] S3. Active material preparation: respectively 20wt% Fe(NO 3 ) 3 9H 2 O, 5wt% Ce(NO 3 ) 3 ·6H 2 O and 5wt%Sm(NO 3 ) 3 ·6H 2 O was dissolved in deionized water to make a mixed soluti...

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Abstract

The invention discloses a denitration catalyst. The denitration catalyst comprises a carrier honeycomb ceramic and TiO2 and oxides of active substances Sm, Ce and Fe compounded on the carrier honeycomb ceramic, wherein the mole ratio of Ce to Fe to Sm in the active substances is at 1:(2.0-7.1):(0.8-1.6). The preparation method comprises the following steps: firstly, attaching a layer of TiO2 to the surface of the honeycomb ceramic; adopting a dipping method for dipping precursors of Fe, Ce and Sm; lastly, drying and roasting, thereby acquiring an end product of the catalyst. An integrated catalyst prepared according to a method for preparing an integrated low-temperature denitration catalyst provided by the invention is high in denitration activity, has a wide temperature window, is nontoxic, has a certain capacity of resisting SO2 and alkaline earth metal poisoning and can be directly applied to practical industrial flue gas treatment.

Description

technical field [0001] The invention relates to the field of denitration catalysts, in particular to a denitration catalyst and a preparation method thereof. Background technique [0002] Selective catalytic reduction flue gas denitrification technology is currently the most widely used NO in the world x The removal method, this technology mainly refers to the use of the catalytic performance of the catalyst to make the reducing agent selectively remove the NO in the flue gas under a certain temperature condition. x Converts to harmless N 2 and H 2 O. The most critical part of SCR denitrification technology is the SCR catalyst. V 2 o 5 / TiO2 series catalyst, its denitrification rate can reach more than 90% in industrial application, but V 2 o 5 It is toxic and will cause pollution during production, use and disposal. Contents of the invention [0003] In view of this, the invention provides a non-toxic and highly active denitration catalyst and a preparation metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B01J35/04B01D53/86B01D53/56
CPCB01D53/8628B01D2258/0283B01J23/83B01J35/04
Inventor 吴苏州李娇
Owner SHENZHEN JINGTE INTELLIGENT MFG TECH CO LTD
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