Metallic monolithic structuring core-shell structured denitration catalyst and preparation method thereof

A denitration catalyst and a core-shell structure technology, applied in the field of nitrogen oxide control and purification in environmental protection, can solve the problems of high treatment cost, cumbersome steps, uneven coating, etc., and achieve excellent sulfur and water resistance and environmental toxicity. Small, low temperature activity high effect

Active Publication Date: 2018-06-29
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent CN100455352C and Chinese patent CN102166515A disclose aluminum oxide coated honeycomb wire mesh supported TiO 2 or WO 3 -TiO 2 catalyst, but the coating technology involves the secondary loading of catalyst active components, which has the disadvantages of cumbersome steps, high processing cost, uneven coating, and easy falling off of the catalyst. It is difficult to adapt to complex working conditions and has not fundamentally solved The defect of poor low-temperature anti-sulfur performance, so it is urgent to develop a new low-temperature anti-sulfur metal monolithic denitrification catalyst preparation technology

Method used

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  • Metallic monolithic structuring core-shell structured denitration catalyst and preparation method thereof

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Effect test

Embodiment 1

[0029] Embodiment one: 1 g aluminum wire mesh is placed in the hydrothermal reactor containing deionized water, 100 o C water heat for 12 h. Washed three times with deionized water, 100 o C drying for 12 h, the aluminum wire mesh structured pseudo-boehmite composite material was prepared. Weigh iron nitrate containing 0.1 g Fe and cerium nitrate containing 0.03 g Ce and dissolve it in 0.8 g methanol, add 0.416 g bis-triethanolamine diisopropyl titanate, and sonicate for 10 minutes. Then, the incipient wetness of pseudo-boehmite structured with aluminum mesh was impregnated in the above mixed solution, and after standing for 2 hours, 0.08 g of deionized water was added dropwise, and stood for 4 hours to make the coupling agent and the pseudo-boehmite on the monolithic carrier Boehmite is fully hydrolyzed. The resulting material 100 o C drying 12 h, 500 oC Calcined for 3 h to prepare Al mesh-structured titanium dioxide-wrapped iron-cerium catalyst.

[0030] To test the cat...

Embodiment 2

[0031] Embodiment two: 1 g aluminum wire mesh is placed in the hydrothermal reaction kettle containing deionized water, 100 o C water heat for 12 h. Washed three times with deionized water, 100 o C drying for 12 h, the aluminum wire mesh structured pseudo-boehmite composite material was obtained. Weigh iron nitrate containing 0.1 g Fe and zirconium nitrate 0.03 g Zr and dissolve in 0.8 g methanol, add 0.416 g bis-triethanolamine diisopropyl titanate, and sonicate for 10 minutes. Then, the incipient wetness of pseudo-boehmite structured with aluminum mesh was impregnated in the above mixed solution, and after standing for 2 hours, 0.08 g of deionized water was added dropwise, and stood for 4 hours to make the coupling agent and the pseudo-boehmite on the monolithic carrier Boehmite is fully hydrolyzed. The resulting material 100 o C drying 12 h, 500 oC Calcined for 3 h to prepare the Fe-Zr catalyst wrapped in TiO2 with Al mesh structure.

[0032] To test the catalytic act...

Embodiment 3

[0033] Embodiment three: 1 g aluminum wire mesh is placed in the hydrothermal reactor containing deionized water, 100 o C water heat for 12 h. Washed three times with deionized water, 100 o C drying for 12 h, the aluminum wire mesh structured pseudo-boehmite composite material was obtained. Weigh ferric nitrate containing 0.1 g Fe and 0.03 g La lanthanum nitrate and dissolve in 0.8 g methanol, add 0.416 g bis-triethanolamine diisopropyl titanate, and sonicate for 10 minutes. Then, the incipient wetness of pseudo-boehmite structured with aluminum mesh was impregnated in the above mixed solution, and after standing for 2 hours, 0.08 g of deionized water was added dropwise, and stood for 4 hours to make the coupling agent and the pseudo-boehmite on the monolithic carrier Boehmite is fully hydrolyzed. The resulting material 100 o C drying 12 h, 500 oC Calcined for 3 h to prepare aluminum mesh structured titania-wrapped iron lanthanum catalyst.

[0034] To test the catalytic ...

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Abstract

The invention discloses a metallic monolithic structuring core-shell structured denitration catalyst and a preparation method thereof. The denitration catalyst is a metallic monolithic structuring core-shell structured catalyst obtained through in situ growth of hydroxide on a metallic monolithic carrier and one-step self-assembling by means of the bidirectional bridging effect of a coupling agent, wherein a main active component and an assistant are used as the core, and metal oxide is used as the shell. The catalyst comprises 0.01-30 wt% of the main active component, 0-30 wt% of the assistant, 0-50 wt% of the metal oxide, and the balance of the metallic monolithic material. The catalyst has the advantages of good low-temperature activity, excellent resistance to sulfur and water, simplepreparation method, no molding, and good heat conduction property, and is suitable for treating nitrogen oxides in tail gas discharged from a coal-fired power plant, a garbage incinerator and a steelmill.

Description

technical field [0001] The invention relates to a denitration catalyst and a preparation method thereof, in particular to a metal monolithic structured core-shell structure denitration catalyst and a preparation method thereof, which is suitable for complex working conditions containing SO 2 The invention relates to the removal of nitrogen oxides emitted from stationary sources of water vapor and water vapor, and belongs to the technical field of nitrogen oxides control and purification in environmental protection. Background technique [0002] With the rapid development of industry and economy, the flue gas emitted by coal-fired power plants, steel plants and boiler plants has caused great pollution to the atmosphere. Nitrogen oxides (NO x ) as a major air pollutant is an important source of acid rain, photochemical smog, and smog, and poses a huge threat to ecosystems and human health. Selective catalytic reduction of ammonia (NH 3 -SCR) is the most widely used flue gas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01J23/745B01J23/75B01J23/83B01J23/889B01J35/08B01D53/86B01D53/56
CPCB01D53/8628B01D2257/404B01D2258/0283B01J23/34B01J23/745B01J23/75B01J23/83B01J23/8892B01J35/08
Inventor 张登松施利毅韩璐蓬李红蕊颜婷婷
Owner SHANGHAI UNIV
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