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Catalyst used for reducing oxynitrides in oxygen-enriched atmosphere, its preparation and its application

A nitrogen oxide compound and catalyst technology, applied in the field of In-Fe/SZ catalyst, can solve the problem of low activity and achieve the effect of simple preparation method and good high-temperature reaction activity

Inactive Publication Date: 2012-10-17
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalysts mentioned above can effectively eliminate NOx under aerobic conditions, but the activity is not high

Method used

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  • Catalyst used for reducing oxynitrides in oxygen-enriched atmosphere, its preparation and its application
  • Catalyst used for reducing oxynitrides in oxygen-enriched atmosphere, its preparation and its application
  • Catalyst used for reducing oxynitrides in oxygen-enriched atmosphere, its preparation and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 0.14 g of In(NO 3 ) 3 ·5H 2 O was added to 2 ml of deionized water, and after it was completely dissolved, 2 g was added after 120 o C dried carrier SZ, let stand overnight, at 120 o Dry at C for 8 h, in a muffle furnace at 600 o C was calcined for 6 h to obtain 2 %In / SZ catalyst.

Embodiment 2

[0029] 0.28 g of In(NO 3 ) 3 ·5H 2 O was added to 2 ml of deionized water, and after it was completely dissolved, 2 g was added after 120 o C dried carrier SZ, let stand overnight, at 120 o Dry at C for 8 h, in a muffle furnace at 600 o C was calcined for 6 h to obtain a 4 %In / SZ catalyst.

Embodiment 3

[0031] 0.51 g of In(NO 3 ) 3 ·5H 2 O was added to 2 ml of deionized water, and after it was completely dissolved, 2 g was added after 120 o C dried carrier SZ, let stand overnight, at 120 o Dry at C for 8 h, in a muffle furnace at 600 o C was calcined for 6 h to obtain a 7 %In / SZ catalyst.

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Abstract

The invention relates to a catalyst used for reducing oxynitrides in oxygen-enriched atmosphere, its preparation and its application, concretely relates to a load-type catalyst In-Fe two components catalyst, and its preparation and its application. According to the invention, In is taken as an active center, Fe is taken as a catalyst for an auxiliary agent, In and Fe are highly dispersed on sulfated zirconia (SZ), wherein the In content accounts for 4% of total mass of the catalyst, and the Fe content accounts for 3% of total mass of the catalyst. The catalyst of the invention is suitable for reaction of oxynitrides elimination by methane in the oxygen-enriched atmosphere, and NO in the oxygen-enriched atmosphere can be conversed to N2 in a wide temperature scope (350 DEG C-650 DEG C). Under the temperature of 500 DEG C, the conversion rate of NO can reach 58%. The catalyst can be used for eliminating the oxynitrides in automobile exhaust and reducing the atmospheric pollution due to the automobile exhaust.

Description

technical field [0001] The invention relates to an In-Fe / SZ catalyst used for reducing nitrogen oxides in an oxygen-rich atmosphere, in particular, it is a catalyst that uses methane as a reducing agent to catalyze the elimination of nitrogen oxides (NOx) under oxygen-rich conditions. the catalyst used. Background technique [0002] With the continuous deepening of mankind's understanding of sustainable development strategies, environmental pollution and prevention issues have attracted great attention from all countries in the world. Therefore, the elimination of nitrogen oxides (NOx, nitrogen monoxide and Nitrogen dioxide is the main air pollutant, of which nitrogen monoxide accounts for 95 %) becomes particularly important. Nitrogen oxides are not only produced by the burning of fossil fuels necessary for human activities, but also natural volcanic activities, lightning, microbial degradation of proteins and other processes will produce a large amount of NOx. 3 , OH, or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/125B01D53/90B01D53/56
CPCY02C20/20Y02C20/10
Inventor 张洪艳李宁王爱琴张涛李林王晓东
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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