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Catalyst for removing dioxin and preparation method thereof

A catalyst and removal technology, applied in the direction of chemical instruments and methods, heterogeneous catalyst chemical elements, physical/chemical process catalysts, etc., can solve the problems of low conversion rate, high strength, long chemical life, etc., to increase efficiency, Effect of improving wear resistance and reducing activation energy

Inactive Publication Date: 2017-05-31
ZHEJIANG TUNA ENVIRONMENTAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention has denitrification and dioxin removal properties, and the whole body is active; the denitrification efficiency is high, SO 2 / SO 3 Low conversion rate, low ammonia escape rate, wear resistance, high strength, long chemical life; wide temperature range, etc., but its performance in removing dioxins is not obvious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] 1) Configuration of active liquid:

[0050] Active solution A: Heat 250mL of deionized water to 60°C and stir, add 26g of monoethanolamine, continue heating, when the temperature reaches 85°C, add 24g of ammonium metavanadate, and then keep it at 95°C for 30 minutes to ensure that the ammonium metavanadate Dissolve completely, cool at 50°C and keep warm, and set aside.

[0051] Active solution B: Heat 400mL of deionized water, when the temperature reaches 50°C, add 95g of cerium nitrate, stir to dissolve, keep warm, and set aside.

[0052] 2) Mixing

[0053] Step 1: Add 3500g of titanium dioxide, 500g of montmorillonite, 300g of ammonium metatungstate and 130g of manganese oxalate into a small mixer and dry mix them evenly.

[0054] Step 2: Add 25g of stearic acid, 65g of lactic acid, 300mL of ammonia water, and 2.7L of water in sequence, and mix. The target moisture content is 38%-40%.

[0055] Step 3: Add 2kg of titanium dioxide, 100mL of ammonia water, and 200mL o...

Embodiment 2

[0064] Adjust the monoethanolamine and ammonium metavanadate during the preparation of the active solution A in Example 1 to 52g and 48g, respectively.

[0065] The first step of mixing becomes: add 3170g of titanium dioxide, 750g of montmorillonite, 400g of ammonium metatungstate and 130g of manganese oxalate into a small mixer for dry mixing.

[0066] The rest of the process remains unchanged.

Embodiment 3

[0068] The monoethanolamine and ammonium metavanadate in the preparation process of active solution A in Example 1 were adjusted to 78g and 72g respectively.

[0069] The first step of mixing becomes: add 3215g of titanium dioxide, 625g of montmorillonite, 500g of ammonium metatungstate and 130g of manganese oxalate into a small mixer for dry mixing.

[0070] The rest of the process remains unchanged.

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Abstract

The invention relates to a catalyst for removing dioxin. The catalyst comprises carriers, active ingredients and an auxiliary material, the carriers are TiO2 and montmorillonite, and the active ingredients are VOx, CeOx, MnOx and WOx; the mass sum of the carriers and the active ingredients is 100%, and the catalyst comprises 80-90% of TiO2, 1-10% of montmorillonite, 0.3-0.9% of VOx, 1-3% of MnOx, 0.6-1.2% of CeOx and 3-5% of WOx. According to the catalyst for removing the dioxin and the preparation method thereof, the VOx, the CeOx, the MnOx and the WOx serve as the active ingredients, a polybasic metal cluster is formed, the activation energy required by a reaction is reduced, the efficiency of dioxin removal is improved, the montmorillonite of high quality is added, and therefore the mechanical properties such as the abrasive resistance and compressive strength of the catalyst are improved.

Description

technical field [0001] The invention relates to a catalyst for removing dioxin and a preparation method thereof. Background technique [0002] Dioxins, also known as dioxins (qǐ), are colorless, odorless, highly lipophilic, and accumulate in fat after entering the human body. In addition, it is easy to form strong bonds with soil or other particulate matter. Once it causes pollution, it is extremely difficult to remove, so it is highly persistent and cumulative, and can cause serious harm to humans through the amplification of the food chain. [0003] The toxicity of dioxin is related to the 8 positions substituted by chlorine atoms. People are most concerned about the PCDD / Fs homologues with chlorine atoms in the four coplanar substitution positions of 2, 3, 7, and 8. There are 17 species in total. The most toxic is 2,3,7,8 tetrachlorodibenzo-p-dioxin, which is 1000 times more toxic than potassium cyanide (KCN), so it is called the most toxic poison on earth . For the tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01D53/86B01D53/70
CPCB01J23/002B01D53/8662B01J23/34B01J2523/00B01J2523/3712B01J2523/47B01J2523/55B01J2523/69B01J2523/72
Inventor 赵博李浙飞王瑞洋沈刚峰陈天德
Owner ZHEJIANG TUNA ENVIRONMENTAL SCI & TECH
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