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High specific surface area enhanced integrated alumina supported iron-manganese binary catalyst

A technology with alumina loading and high specific surface area, which is applied in the field of catalysis and can solve problems such as the limitation of specific surface area of ​​catalysts

Inactive Publication Date: 2017-05-24
平潭自贸区金瑜环保材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In principle, it can be speculated that due to the low specific surface area of ​​cordierite, the specific surface area of ​​the entire catalyst will also be greatly limited.

Method used

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  • High specific surface area enhanced integrated alumina supported iron-manganese binary catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A high specific surface area enhanced monolithic alumina-supported iron-manganese binary catalyst, including a catalyst preparation method and catalyst product characteristics; wherein the preparation method uses the following raw materials:

[0051] Aluminum precursor: aluminum hydroxide;

[0052] Iron precursor: ferric chloride;

[0053] Manganese precursor: manganese sulfate;

[0054] The first additive: a mixture of kale powder and sodium carboxyethyl cellulose, the mass ratio of the two is 4.5 to 1;

[0055] Second additive: carbon black with particle size less than 60 mesh;

[0056] Acid solution: a mixed aqueous solution of nitric acid and oxalic acid with a pH value of 0.5, wherein the molar ratio of nitric acid to oxalic acid is 1:1;

[0057] Supporting material: stainless steel bar, about 2.5 cm in length; its cross-sectional area is about 0.03 cm 2 .

[0058] The catalyst preparation method described in this embodiment uses an integral catalyst forming m...

Embodiment 2

[0083] This example is a comparative example, and the purpose is to verify the mechanical strength enhancing effect of the supporting material on the monolithic catalyst in Example 1. The specific method is the same as the first embodiment, the difference is that:

[0084] Step 2, filling the inclusions; no supporting material is used; other filling processes are the same as in the first embodiment; at this time, only the forming precursor is contained in the inclusions without supporting materials.

[0085] The product obtained after completing step 4 is called "monolithic alumina-supported iron-manganese binary catalyst" (marked as product A). Compare the mechanical strength of the product "enhanced monolithic alumina-supported iron-manganese binary catalyst" (marked as product B) in Example 1 with product A in this example, the process is as follows:

[0086] Put the above two products (flaky cylinders) on the same plane respectively, and then place a rigid object in the s...

Embodiment 3

[0089] Others are the same as embodiment one, the difference is:

[0090] Iron precursor: ferric nitrate;

[0091] Manganese precursor: manganese acetylacetonate;

[0092] The first additive: tianjing powder;

[0093] Second additive: ethanol;

[0094] Step 1. Prepare a molding precursor; wherein the ratio of the number of moles of iron-containing elements in the iron precursor to the number of moles of aluminum-containing elements in the aluminum precursor is 0.030, which is converted into the iron precursor (ferric nitrate, excluding crystallization) in the cost example. The mass of the water part) is 7.3 g; the ratio of the moles of manganese-containing elements in the manganese precursor to the moles of aluminum-containing elements in the aluminum precursor is 0.015, which is converted into the mass of the manganese precursor (manganese sulfate) in the cost embodiment is 3.8 g; the ratio of the total moles of iron and manganese elements in iron precursors and manganese ...

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Abstract

The invention belongs to the technical field of catalysis and relates to a high specific surface area enhanced integrated alumina supported iron-manganese binary catalyst, comprising a catalyst preparation method and catalyst product characteristics. The following raw materials are used in the catalyst preparation method: an aluminum precursor, an iron precursor, a manganese precursor, a first additive, a second additive, an acid solution and a supporting material; and an integrated catalyst forming die is used. The method comprises the following steps: 1, preparing formed precursors; 2, filling inclusion; 3, applying pressure to the inclusion; and 4, performing programmed calcinations on formed blocks. The catalyst product obtained by the preparation method has the following characteristics that a single catalyst is large in bulk mass; the overall specific surface area of the catalyst is large; the total mass content of the elements iron and manganese in the catalyst can reach 0.6-20%; and an X-ray diffraction peak of the catalyst only comprises the spectral characteristics of alumina and does not comprise spectral characteristics related to the iron or manganese component. The catalyst product is high in mechanical strength.

Description

technical field [0001] The invention belongs to the technical field of catalysis, and relates to an integral aluminum oxide-supported iron-manganese binary catalyst, in particular, to a method of forming an iron-manganese binary precursor, a supporting material, and an alumina precursor mud blank at one time into a high-efficiency catalyst. An enhanced monolithic alumina-supported iron-manganese binary catalyst product with a specific surface area and a preparation method thereof. Background technique [0002] Catalyst is the core scientific and technical problem of catalytic process. The solid catalysts commonly used in industry can be divided into granular or powdery catalysts, monolithic catalysts and catalysts with specific shapes, among which granular or powdery catalysts are the most common. Supported catalysts are especially common in granular or powder form, because the supports of supported catalysts are mostly porous substances, such as alumina, silica gel, activa...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01J35/10
CPCB01J23/8892B01J35/615
Inventor 不公告发明人
Owner 平潭自贸区金瑜环保材料有限公司