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A kind of attapulgite supported cerium doped mntio x Ternary component low-temperature denitrification catalyst and preparation method thereof

An attapulgite and low-temperature denitrification technology, applied in the field of flue gas denitrification, can solve the problems of difficult fixation of active components, complicated process preparation, small specific surface area, etc., achieve good mechanical and thermal stability, simple preparation process, and improved reaction. effect of speed

Active Publication Date: 2019-12-06
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the fact that the existing denitrification catalyst carrier is not easy to form, the process preparation is complicated, the specific surface area is small, the active component is not easy to fix on the catalyst carrier, the denitrification temperature is high, and the pure MnO X Catalysts are susceptible to SO 2 Poisoning, narrow activity window and many other disadvantages

Method used

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  • A kind of attapulgite supported cerium doped mntio <sub>x</sub> Ternary component low-temperature denitrification catalyst and preparation method thereof
  • A kind of attapulgite supported cerium doped mntio <sub>x</sub> Ternary component low-temperature denitrification catalyst and preparation method thereof
  • A kind of attapulgite supported cerium doped mntio <sub>x</sub> Ternary component low-temperature denitrification catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Dissolve 5 g of raw soil attapulgite in 300 mL of HCl solution with a concentration of 1 mol / L, stir and react at a speed of 300 r / min for 4 h, the purpose is to remove impurities, and at the same time move hydroxyl groups on the surface of attapulgite. After the reaction, filter with suction, wash and dry. as a carrier.

[0030] (2) Put 3.0g CTAB (cetyltrimethylammonium bromide) into a 500ml three-necked flask, and dissolve it in deionized water to obtain a solution with a concentration of about 1g / 100mL, and place it in a constant temperature water bath at 30°C Stir until dissolved, and turn off the constant temperature water bath.

[0031] (3) Grind and sieve the acidified attapulgite prepared in step (1) and weigh 5g, disperse it in 30ml deionized water and add it into step (2) while stirring to prepare a 1.5g / ml mixed dispersion, take 3.75 Add 5g of titanium sulfate and 5.6g of 50% manganese nitrate into a three-necked flask and stir for 0.5h.

[0032] (4) 2...

Embodiment 2

[0036] (1) Dissolve 5 g of original soil attapulgite in 300 mL of HCl solution with a concentration of 1 mol / L, and stir for 4 hours at a speed of 300 r / min. After the reaction, filter with suction, wash and dry. as a carrier.

[0037] (2) Put 3.0g CTAB (cetyltrimethylammonium bromide) into a 500ml three-necked flask, and dissolve it in deionized water to obtain a solution with a concentration of about 1g / 100mL, and place it in a constant temperature water bath at 30°C Stir until dissolved, and turn off the constant temperature water bath.

[0038] (3) Grind and sieve the acidified attapulgite prepared in step (1) and weigh 5g, disperse it in 30ml deionized water and add it into step (2) while stirring to prepare a 1.5g / ml mixed dispersion, take 2.25 g titanium sulfate and 3.36 g 50% manganese nitrate were added to a three-necked flask and stirred for 0.5 h.

[0039] (4) 2g Ce(NO 3 ) 3 ·6H 2 O was further added into the three-necked flask in (2), stirred for about 20 min...

Embodiment 3

[0042] (1) Dissolve 5 g of original soil attapulgite in 300 mL of HCl solution with a concentration of 1 mol / L, and stir for 4 hours at a speed of 300 r / min. After the reaction, filter with suction, wash and dry. as a carrier.

[0043] (2) Put 3.0g CTAB (cetyltrimethylammonium bromide) into a 500ml three-necked flask, and dissolve it in deionized water to obtain a solution with a concentration of about 1g / 100mL, and place it in a constant temperature water bath at 30°C Stir until dissolved, and turn off the constant temperature water bath.

[0044] (3) Grind and sieve the acidified attapulgite prepared in step (1) and weigh 5g, disperse it in 30ml deionized water and add it into step (2) while stirring to prepare a 1.5g / ml mixed dispersion, take 4.5 Add 1 g of titanium sulfate and 11.2 g of 50% manganese nitrate into a three-necked flask and stir for 0.5 h.

[0045] (4) 2g Ce(NO 3 ) 3 ·6H 2 O was further added into the three-necked flask in (2), stirred for about 20 min,...

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Abstract

The invention belongs to the field of flue gas denitration, and in particular relates to attapulgite-loaded cerium-doped MnTiO X Ternary component low-temperature denitration catalyst and preparation method. The method of the present invention prepares an elliptical MnTiO X , which is the spinel type MnTi 2 O 4 and Mn 3 O 4 The composite oxide is doped with cerium element to form a ternary metal oxide, which is loaded on the surface of the non-metallic clay attapulgite. The catalyst uses inexpensive clay-based attapulgite as a carrier and supports Ce‑Mn‑Ti ternary composite oxide through a one-step precipitation method. The preparation process of the present invention is simple, economical, does not require any template, the catalyst is easy to shape, enhances the catalyst's ability to transfer electrons and ions to store oxygen, effectively reduces the active reaction temperature, greatly improves the thermal stability and service life of the catalyst, and increases Denitrification activity and sulfur resistance, and wide activity window.

Description

technical field [0001] The invention belongs to the field of flue gas denitrification, in particular to an attapulgite-loaded cerium-doped MnTiO X A ternary component low-temperature denitrification catalyst and a preparation method thereof. Background technique [0002] At present, more than 95% of thermal power plants in my country are mainly coal-fired, and it is difficult to change in the short term. Sulfur dioxide, carbon dioxide, nitrogen oxides and dust emitted during the coal combustion process account for a high amount of my country's emissions, especially the emission of nitrogen oxides seriously endangers human health and damages the ecological environment. my country's pollution is already quite serious, so NO X Sufficient attention should be paid to the control and governance of the system. The reducing agents used in the SCR reaction today mainly include ammonia (gaseous ammonia and urea), hydrocarbons and CO. Selective catalytic reduction (SCR) is the most w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/34B01J35/10B01J37/00B01D53/86B01D53/56
CPCB01D53/8628B01J23/002B01J23/34B01J37/0018B01D2258/0283B01J2523/00B01J35/61B01J2523/22B01J2523/31B01J2523/3712B01J2523/41B01J2523/47B01J2523/72
Inventor 罗士平黄晓艳谢爱娟唐毅然姚超李霞章
Owner CHANGZHOU UNIV
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