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Composite Fe3O4 type structured catalyst used for hydrogen production from methane, and preparation method thereof

A structured catalyst and catalyst technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, chemical instrument and method, etc., can solve the problem of slowing down the development of coal gasification hydrogen production process and production cost High hydrogen production cost and other problems, to achieve the effect of improving catalytic efficiency and selectivity, improving life, and simple preparation method

Inactive Publication Date: 2012-10-24
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high cost of hydrogen production by electrolysis of water, 90% of hydrogen is currently produced by fossil fuels
Among fossil fuels, coal is rich in resources, but its production cost is high and pollution is high, so the development of coal gasification hydrogen production process is slowing down

Method used

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  • Composite Fe3O4 type structured catalyst used for hydrogen production from methane, and preparation method thereof
  • Composite Fe3O4 type structured catalyst used for hydrogen production from methane, and preparation method thereof
  • Composite Fe3O4 type structured catalyst used for hydrogen production from methane, and preparation method thereof

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preparation example Construction

[0033] The above composite Fe for hydrogen production from methane 3 o 4 The preparation method of type structured catalyst comprises the following steps:

[0034] The first step: pretreatment cordierite honeycomb ceramic carrier: take the cordierite honeycomb ceramic carrier that is cut into a cylinder with a length of 5-6 cm, and the cordierite honeycomb ceramic carrier has 60-62 holes per square centimeter and a weight of 10 -13g; After smoothing the outer surface of the cordierite honeycomb ceramic carrier with sandpaper, soak the cordierite honeycomb ceramic carrier in glacial acetic acid for 1 to 2 hours, then rinse with distilled water, and then place the cordierite honeycomb ceramic carrier at a temperature of 110-120 ℃ drying oven for 1-1.5 hours, then placed in a muffle furnace for 500-900 ℃ calcination for 2-3 hours, and finally cooled naturally in the air to obtain a pretreated cordierite honeycomb ceramic carrier.

[0035] The second step: prepare the auxiliary ...

Embodiment 1

[0052] The catalyst contains four elements of Zr, Mn, W and Fe, wherein the molar ratio of the four elements is Zr:Mn:W:Fe=0.0385:0.0519:0.0364:1.00. Weigh 10.29 grams (0.0385 moles) of ZrO(NO) 2 2H 2 O, 13.03 grams (0.0519 moles) Mn(NO 3 ) 2 4H 2 O, 13.61 grams (0.0364 moles) (NH 4 ) 2 WO 4 ·5H 2 O and 404.00 g (1.00 mol) Fe(NO 3 ) 3 9H 2 O, add to a 1000mL volumetric flask, add distilled water, and make a solution of about 1.1268mol / L. Pour the solution into a 2000 mL three-neck flask, add 203.03 g (3.3804 moles) of urea, and fully react in a water bath at 90° C. for 5 hours under vigorous stirring to obtain mixed precipitates. The precipitate was filtered and washed with water until neutral, and then the filter cake was washed with absolute ethanol to replace the water in the filter cake. The filter cake was dried at 120°C for 7 hours to constant weight, then roasted at 750°C for 10 hours in a muffle furnace, and cooled to room temperature naturally in the air t...

Embodiment 2

[0058] The catalyst contains four elements of Zr, Ni, V and Fe, wherein the molar ratio of the four elements is Zr:Ni:V:Fe=0.0864:0.0483:0.0272:1.00. Weigh 23.09 grams (0.0864 moles) of ZrO(NO) 2 2H 2 O, 14.05 g (0.0483 mol) Ni(NO 3 ) 2 ·6H 2 O, 3.18 g (0.0272 mol) NH 4 VO 3 , 404.00 g (1.00 mol) Fe(NO 3 ) 3 9H 2 O was added to a 1000mL volumetric flask, and distilled water was added to form a solution of about 1.1619mol / L. The solution was poured into a 2000 mL three-necked flask, and 174.46 g (2.905 moles) of urea was added. Under vigorous stirring, the mixture was fully reacted in a water bath at 80° C. for 4 hours to obtain mixed precipitates. The precipitate was filtered and washed with water until neutral, and then the filter cake was washed with absolute ethanol to replace the water in the filter cake. The filter cake was dried at 120° C. for 6 hours to constant weight, then roasted at 750° C. for 10 hours in a muffle furnace, and cooled naturally to room temp...

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Abstract

The invention relates to a composite Fe3O4 type structured catalyst used for hydrogen production from methane. The catalyst is composed of cordierite ceramic honeycomb carrier and attachments attached to the surface of the cordierite ceramic honeycomb carrier. The attachments consists of Fe3O4 and auxiliary ingredients, wherein the auxiliary ingredients is the oxides of one or more of the following elements: Mn, Zr, Ni, Co, Cu, Cr, W, V, Ti, Al, and the total molar amount of the metal elements in the auxiliary ingredients is 1-30% of the molar amount of the Fe element in the Fe3O4. The preparation method of the structured catalyst comprises the steps of: preprocessing the cordierite ceramic honeycomb carrier; preparing solution of the auxiliary ingredients; adding a precipitating agent to the solution of the auxiliary ingredients; filtering the metal ions to form a filter cake; drying and roasting the filter cake to obtain a powdery catalyst; adding distilled water and pseudo-boehmite to the powdery catalyst to obtain a slurry; and adding the ceramic honeycomb carrier into the slurry, drying and roasting. The structured catalyst has the advantages of good catalytic properties, long service life time, and simple and feasible preparation method.

Description

technical field [0001] The invention relates to a composite Fe for methane hydrogen production 3 o 4 Type structured catalyst and its preparation method, especially the composite Fe for hydrogen production from methane which is catalyzed by various metal elements 3 o 4 Type structured catalyst and preparation method. Background technique [0002] As human beings pay more and more attention to environmental issues, the emission standards (allowing the emission of sulfur and nitrogen compounds) of traditional fossil fuels (such as diesel and gasoline) are becoming more and more stringent, and it is the general trend to seek environmentally friendly fuels. [0003] As a clean fuel, hydrogen has the characteristics of high combustion calorific value and no emission of environmental greenhouse gases, so it is an ideal energy source. The use of hydrogen energy will also increase the market demand for hydrogen. At the same time, hydrogen is widely used in petroleum, chemical in...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01J23/847B01J23/75B01J23/888B01J23/86B01J23/745C01B3/26
Inventor 黄凯傅淑霞
Owner SOUTHEAST UNIV
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