Attapulgite-loaded cerium-doped MnTiOX three-membered component low-temperature denitration catalyst and preparation method

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

Active Publication Date: 2018-08-14
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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  • Attapulgite-loaded cerium-doped MnTiOX three-membered component low-temperature denitration catalyst and preparation method
  • Attapulgite-loaded cerium-doped MnTiOX three-membered component low-temperature denitration catalyst and preparation method
  • Attapulgite-loaded cerium-doped MnTiOX three-membered component low-temperature denitration catalyst and preparation method

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, and stir and react at a speed of 300 r / min for 4 hours. 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 weigh 5g of the acidified attapulgite prepared in step (1), 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 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.

[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] (...

Embodiment 3

[0042] (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.

[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...

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Abstract

The invention belongs to the field of flue gas denitrification, and particularly relates to an attapulgite-loaded cerium-doped MnTiOX three-membered component low-temperature denitration catalyst anda preparation method. Elliptoidal MnTiOX is prepared by the method, and elliptoidal MnTiOX is a spinel-type MnTi2O4 and Mn3O4 composite oxide, and cerium element is doped therein to form a three-membered metal oxide loaded on a non-metal clay attapulgite surface. Clay-type attapulgite with low cost is taken as a carrier of the catalyst, and loads a Ce-Mn-Ti three-membered composite oxide by a one-step precipitation method. The preparation process is simple, economical and practical, any template is not needed, the catalyst is easy to form, the capabilities of transmitting electrons and ions and storing oxygen by the catalyst are enhanced, the active reaction temperature is effectively lowered, the thermal stability and the service life of the catalyst are greatly improved and prolonged, the denitrification activity and sulfur resistance are improved, and an activity window is wide.

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 has been 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 wid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01J35/10B01J37/00B01D53/86B01D53/56
CPCB01D53/8628B01D2258/0283B01J23/002B01J23/34B01J35/1004B01J37/0018B01J2523/00B01J2523/22B01J2523/31B01J2523/3712B01J2523/41B01J2523/47B01J2523/72
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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