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Fume denitration composite catalyst using titanium-base ceramics as carrier and preparation method thereof

A catalyst, titanium-based technology, used in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of easy pulverization of catalysts and poor wear resistance, and achieve good thermal stability and water vapor resistance. The effect of strong, wide and long active temperature windows

Inactive Publication Date: 2010-01-27
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the catalyst is easy to pulverize and has poor wear resistance

Method used

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  • Fume denitration composite catalyst using titanium-base ceramics as carrier and preparation method thereof
  • Fume denitration composite catalyst using titanium-base ceramics as carrier and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) TiO 2 -ZrO 2 -V 2 o 5 Composite sol preparation

[0020] First, stir 17ml butyl titanate and 25ml absolute ethanol to prepare liquid A, then add 12ml glacial acetic acid, 5ml water, and 30ml absolute ethanol in order to prepare liquid B, then add all liquid A to liquid B dropwise , stirred for 20 minutes, then added 5.3 g of zirconium oxychloride and stirred for 40 minutes to obtain a titanium-zirconium mixed sol. Then, ammonium metavanadate and oxalic acid were weighed in a molar ratio of 1:1 to weigh 1.9458g ammonium metavanadate and 2.0970g oxalic acid for batching, add distilled water and stir until the two are completely dissolved to prepare a vanadium solution, and finally add all the vanadium solution to the titanium In the zirconium composite sol, mix and stir for 20 to 60 minutes to obtain an orange-yellow titanium-zirconium-vanadium mixed sol.

[0021] (2) TiO 2 -ZrO 2 -V 2 o 5 Loading of composite oxide active coating

[0022] The acid-treated A...

Embodiment 2

[0025] (1) TiO 2 -ZrO 2 -V 2 o 5 Composite sol preparation

[0026] First, stir 17ml butyl titanate and 34ml absolute ethanol to prepare liquid A, then add 10ml glacial acetic acid, 5ml water, and 30ml absolute ethanol in order to prepare liquid B, then add all liquid A to liquid B dropwise , stirred for 20 minutes, then added 15.9 g of zirconium oxychloride and stirred for 40 minutes to obtain a titanium-zirconium mixed sol. Then, ammonium metavanadate and oxalic acid were weighed in a molar ratio of 1:1 to weigh 1.9458g ammonium metavanadate and 2.0970g oxalic acid for batching, add distilled water and stir until the two are completely dissolved to prepare a vanadium solution, and finally add all the vanadium solution to the titanium In the zirconium composite sol, mix and stir for 20 to 60 minutes to obtain an orange-yellow titanium-zirconium-vanadium mixed sol.

[0027](2)TiO 2 -ZrO 2 -V 2 o 5 Loading of composite oxide active coating

[0028] Immerse the acid-tr...

Embodiment 3

[0030] (1) TiO 2 -ZrO 2 -V 2 o 5 Composite sol preparation

[0031] First, mix 17ml of butyl titanate and 17ml of absolute ethanol to prepare liquid A, then add 15ml of glacial acetic acid, 10ml of water, and 36ml of absolute ethanol in order to prepare liquid B, then add all of liquid A to liquid B dropwise , stirred for 20 minutes, then added 1.8 g of zirconium oxychloride and stirred for 40 minutes to obtain a titanium-zirconium mixed sol. Then, ammonium metavanadate and oxalic acid were weighed in a molar ratio of 1:1 to weigh 1.9458g ammonium metavanadate and 2.0970g oxalic acid for batching, add distilled water and stir until the two are completely dissolved to prepare a vanadium solution, and finally add all the vanadium solution to the titanium In the zirconium composite sol, mix and stir for 20 to 60 minutes to obtain an orange-yellow titanium-zirconium-vanadium mixed sol.

[0032] (2)TiO 2 -ZrO 2 -V 2 o 5 Loading of composite oxide active coating

[0033] I...

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Abstract

The invention relates to a stack gas desulfurization composite catalyst which takes titanium matrix ceramics as a carrier, and a preparation method thereof, and belongs to the technology field of the environment-protecting catalytic material and the air pollution control. The method is characterized in that the stack gas desulfurization composite catalyst takes the titanium matrix ceramics as the carrier, and takes Ti-Zr-V combined metal oxide as catalyst active components; based on the mass of the carrier, the mass percentage loaded by the Ti-Zr-V combined metal oxide is 5 to 40wt percent, wherein, the molar ratio between Ti and Zr is 1:0.1 to 1, and the molar ratio between Ti and V is 1:0.013 to 1. The invention adopts the preparation method that the titanium matrix ceramics are dried and roasted for the preparation after dipping in Ti-Zr-V composite sol. Compared with the prior art, the stack gas desulfurization composite catalyst and the preparation method thereof not only reduce the loading of the active components, broaden the temperature window of catalytic activity, and increase the anti-sulfur-poisoning property of the catalyst, but also increase the mechanicalness and the thermal stability of the catalyst support, and have low cost.

Description

technical field [0001] The invention relates to a flue gas denitrification composite catalyst with titanium-based ceramics as a carrier and a preparation method thereof, belonging to the fields of air pollution control technology and environmental protection catalytic materials. Background technique [0002] Among the numerous flue gas denitrification methods, selective catalytic reduction (SCR) denitrification technology has been widely used because of its high denitrification efficiency. At present, the SCR denitrification equipment of large and medium-sized thermal power plants in my country is all imported, and the price is very expensive (the denitrification catalyst for a 600MW unit costs about 40 million and needs to be replaced every two years). Flue gas denitrification catalysts without independent intellectual property rights have become my country's environmental protection The "coreless pain" in the field. Commercial SCR denitration catalysts are mainly V 2 o 5...

Claims

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Application Information

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IPC IPC(8): B01J23/22B01J21/06B01D53/56B01D53/86
Inventor 祝社民沈岳松
Owner NANJING UNIV OF TECH
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