Lead poisoning resistant Fe-Mn-Ce/titanium-containing blast furnace slag denitration catalyst

A denitrification catalyst, fe-mn-ce technology, applied in the field of low-temperature SCR flue gas denitrification, achieves the effect of low acid consumption, low purification and separation requirements, and high repeatability

Pending Publication Date: 2021-12-14
CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the characteristics of heavy metals with physiological toxicity and different valence states, there are relatively few studies on improving heavy metal poisoning denitrification catalysts.

Method used

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  • Lead poisoning resistant Fe-Mn-Ce/titanium-containing blast furnace slag denitration catalyst
  • Lead poisoning resistant Fe-Mn-Ce/titanium-containing blast furnace slag denitration catalyst
  • Lead poisoning resistant Fe-Mn-Ce/titanium-containing blast furnace slag denitration catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Low-titanium blast furnace slag (from the Panzhihua Iron and Steel Region in western China) was treated with dilute hydrochloric acid with a concentration of 2 mol / L and a mass fraction of 37 wt%, and fully reacted at a constant temperature of 30°C for 2 hours. Subsequently, a centrifuge at 800r / min was used for solid-liquid separation, and the solid component was repeatedly washed with pure water until it was neutral, then dried at 80°C for 12 hours, and ground to powder. The main chemical components of the original titanium slag and acid leaching residue are shown in Table 1.

[0025] The composition of former titanium slag and acid leaching residue in table 1 embodiment of the present invention

[0026]

[0027] Preparation of Fe-Mn-Ce / titanium-containing blast furnace slag low-temperature denitrification catalyst by impregnation method. First, account for 15wt% of the carrier according to the total mass of manganese and cerium oxides, weigh 8.08g iron nitrate no...

Embodiment 2

[0030] The preparation method of original titanium slag and acid leaching slag carrier (titanium-containing blast furnace slag composite carrier) is the same as that in Example 1. Preparation of Fe-Mn-Ce / titanium-containing blast furnace slag low-temperature denitrification catalyst by impregnation method. First, account for 15wt% of the carrier according to the total mass of manganese and cerium oxides, weigh 4.04g iron nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 O), 2.17g cerium nitrate hexahydrate (Ce(NO 3 ) 3 ·6H 2 O), 4.65mL manganese nitrate solution (Mn(NO 3 ) 2 and 17.33g of acid leaching residue carrier, mixed in 100mL of distilled water and stirred for 10min, then ultrasonically oscillated for 30min. , so that the raw materials used are fully stirred and evenly dispersed in the solution. Then, put it in an 80°C water bath and stir evenly until the water is completely evaporated to dryness, then transfer it to an 80°C drying oven for 24 hours, and finally put the sa...

Embodiment 3

[0033] The preparation method of the carrier (titanium-containing blast furnace slag composite carrier) of the original titanium slag and the acid leaching residue is the same as in Example 1. Preparation of Fe-Mn-Ce / titanium-containing blast furnace slag low-temperature denitrification catalyst by impregnation method. First, account for 20wt% of the carrier according to the total mass of manganese and cerium oxides, weigh 8.08g iron nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 O), 2.17g cerium nitrate hexahydrate (Ce(NO 3 ) 3 ·6H 2 O), 4.65mL manganese nitrate solution (Mn(NO 3 ) 2 and 13.01g of acid leaching residue carrier, mixed in 100mL of distilled water and stirred for 10min, then ultrasonically oscillated for 30min. , so that the raw materials used are fully stirred and evenly dispersed in the solution. Then, put it in an 80°C water bath and stir evenly until the water is completely evaporated, then transfer it to an 80°C drying oven for 24 hours, and finally put the ...

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Abstract

The invention provides a Fe-Mn-Ce / titanium-containing blast furnace slag denitration catalyst . The Fe-Mn-Ce / titanium-containing blast furnace slag denitration catalyst provided by the invention has the characteristics of excellent low-temperature catalytic activity, wide reaction temperature window and the like, the price cost of the used raw materials is lower, and compared with a rare earth metal-based catalyst, the Fe-Mn-Ce / titanium-containing blast furnace slag denitration catalyst has obvious advantages. The Fe-Mn-Ce / titanium-containing blast furnace slag denitration catalyst provided by the invention has an obvious anti-poisoning effect on heavy metals such as PbO, PbCl2 or PbSO4. When the catalyst is applied to the field of selective catalytic reduction flue gas denitration, the actual service life of the catalyst can be prolonged, and the use cost is reduced. And the idea of turning waste into wealth is adopted, so that the blast furnace by-product titanium-containing blast furnace slag can be utilized to a greater extent, resources are saved, the pollution to the environment is reduced, and good social benefits are achieved.

Description

technical field [0001] The invention relates to an anti-lead poisoning Fe-Mn-Ce / titanium-containing blast furnace slag denitrification catalyst, which belongs to the technical field of low-temperature SCR flue gas denitrification. Background technique [0002] Nitrogen oxides in the environment can cause serious pollution of air quality, such as acid rain, photochemical smog, smog, etc. Therefore, the purification control of nitrogen oxides is very necessary. Selective catalytic reduction (SCR) denitrification technology is considered to be one of the most potential technologies for flue gas denitrification because it is easy to design specifically for flue gas components and has high denitrification efficiency. The core of SCR denitrification technology is the catalyst. The composition of flue gas produced in the production process of steel, cement, glass and other industries is complex, except for water vapor and SO 2 In addition, it also contains alkali metals (K, Na),...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01J37/06B01J32/00B01J35/10B01J21/12B01J21/06B01J27/135B01J37/02B01J33/00B01D53/56B01D53/86B01D53/90
CPCB01J23/8892B01J37/06B01J21/12B01J21/063B01J27/135B01J37/0201B01J33/00B01D53/8628B01D53/90B01J2523/00B01D2257/404B01D2258/0283B01J35/61
Inventor 孔明张瀚丹王云川孟飞刘清才段明华刘红辉刘维燥
Owner CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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