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Catalyst containing nickel-iron-manganese compound oxide for processing industrial waste gas and preparation method thereof

A technology of composite oxides and industrial waste gas, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, molecular sieve catalysts, etc. and other problems, to achieve the effect of easy expansion and reproduction, low cost and convenient operation

Inactive Publication Date: 2013-06-19
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN14884435A discloses a catalytic combustion catalyst and its preparation method. The catalyst has a high conversion efficiency of catalytic combustion organic waste gas, but needs to use a relatively high content of precious metal elements, and is expensive, has poor anti-toxic performance and is generally practical. Poor performance and other disadvantages
Chinese patent CN101138728A relates to a metal oxide mixture catalyst for purifying organic waste gas and its preparation method. The activated alumina coating modified by lanthanum cerium zirconium mixed oxide and the active group containing a variety of metal oxide mixtures are loaded on the cordierite carrier at one time. It has the characteristics of high catalytic efficiency, simple preparation, low cost and easy to popularize. However, the catalyst is easily deactivated by the reduction of reducing gas (CO) in industrial waste gas.

Method used

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  • Catalyst containing nickel-iron-manganese compound oxide for processing industrial waste gas and preparation method thereof
  • Catalyst containing nickel-iron-manganese compound oxide for processing industrial waste gas and preparation method thereof
  • Catalyst containing nickel-iron-manganese compound oxide for processing industrial waste gas and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Preparation of self-made cordierite carrier

[0037] Take 30g of silica, 40g of alumina and 30g of magnesia and mix evenly. The mixture is roasted at 1300°C, and the holding time is controlled at 6h; the self-made carrier is modified with oxalic acid solution with a mass concentration of 5%, boiled on an electric furnace and kept for 2h. The drying temperature was 80°C, and the drying time was 2 h; the calcination temperature was 400°C, and the calcination time was 6 h, and the self-made cordierite carrier was obtained;

[0038] (2) Modification of self-made cordierite carrier

[0039] Take the above-mentioned 50g carrier and impregnate it in alumina sol for 4 hours, dry it at 80°C for 2 hours, and then roast it at 500°C for 4 hours to obtain a modified cordierite carrier with a mass percentage of alumina of 1%;

[0040] (3) Preparation of nickel-iron-manganese composite oxide catalyst

[0041] Take 50 g of the self-made carrier sample in step (2) and impregna...

Embodiment 2

[0045] (1) Preparation of self-made cordierite carrier

[0046] Take 35g of silica, 40g of alumina and 25g of magnesia and mix evenly. The mixture is roasted at 1400°C, and the holding time is controlled at 6h; the self-made carrier is modified by nitric acid solution with a mass concentration of 10%, boiled on an electric furnace and kept for 2h. The drying temperature was 80°C, and the drying time was 2 h; the calcination temperature was 400°C, and the calcination time was 6 h, and the self-made cordierite carrier was obtained;

[0047] (2) Modification of self-made cordierite carrier

[0048] Take the above-mentioned 50g carrier and impregnate it in silica sol for 4 hours, dry it at 80°C for 2 hours, and then roast it at 500°C for 4 hours to obtain a modified cordierite carrier with a mass percentage of silicon oxide of 4%;

[0049] (3) Preparation of nickel-iron-manganese composite oxide catalyst

[0050] Take 50 g of the self-made carrier sample in step (2) and impr...

Embodiment 3

[0054] (1) Preparation of self-made cordierite carrier

[0055] Take 55g of silicon oxide, 20g of aluminum oxide and 25g of magnesium oxide and mix evenly. The mixture is roasted at 1400°C, and the holding time is controlled at 4h; the self-made carrier is modified with acetic acid solution with a mass concentration of 20%, boiled on an electric furnace and kept for 3h. The drying temperature was 120°C, and the drying time was 1 h; the calcination temperature was 600°C, and the calcination time was 4 h, and the self-made cordierite carrier was obtained;

[0056] (2) Modification of self-made cordierite carrier

[0057] Take the above-mentioned 50g carrier and impregnate it in silica sol for 6 hours, dry it at 120°C for 1 hour, and then roast it at 600°C for 2 hours to obtain a modified cordierite carrier with a mass percentage of silicon oxide of 10%;

[0058] (3) Preparation of nickel-iron-manganese composite oxide catalyst

[0059] Take 50 g of the self-made carrier sa...

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Abstract

The invention relates to a nickel-iron-manganese composite oxide catalyst for treating industrial waste gas and a preparation method thereof, and belongs to the fields of air pollution control technology and environmentally friendly catalytic materials. The catalyst uses nickel-iron-manganese composite oxide as the first active component, and one or two other transition metals, rare earth metals or noble metal oxides as the second active component. The selected carrier is a self-made carrier or a natural carrier. For inorganic material carriers, based on the mass of the carrier, the mass percentages of the first and second active component loadings are 5~20% and 0~10% respectively. The catalyst is a polymorphic catalyst, which can be spherical, columnar, star-shaped, strip-shaped, mesh-shaped, flake-shaped, ring-shaped, belt-shaped, block-shaped, honeycomb-shaped or powder. The catalyst can achieve complete catalytic oxidation of CO, alkanes, halogenated hydrocarbons, aromatic hydrocarbons and heterocyclic compounds at 200~350°C. It has the characteristics of low ignition temperature, high conversion efficiency, low price and wide application range, and is suitable for a variety of Types of enterprises have requirements for industrial waste gas treatment.

Description

technical field [0001] The invention relates to a nickel-iron-manganese composite oxide catalyst for treating industrial waste gas and a preparation method thereof, belonging to the fields of air pollution control technology and environmental protection catalytic materials. technical background [0002] In the industrial production process of chemical industry, electronics, medicine, paint, new material processing and automobile industry, a large amount of industrial waste gas will be emitted, which is the main source of air pollutants. According to statistics, the annual discharge of industrial waste gas in my country is about 20 million tons or more, and with the development of the national economy, it will show a trend of rapid growth. Industrial waste gas includes toxic and harmful gases such as volatile organic gases (VOCs) and CO, which are easy to accumulate in fat-rich tissues, and most of them are carcinogenic, teratogenic, and mutagenic, causing poisoning and death...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/889B01J23/89B01J29/00B01D53/72B01D53/70B01D53/62B01D53/86
CPCY02A50/20
Inventor 沈树宝黄琼祝社民陈英文马文娇严小康
Owner NANJING TECH UNIV
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