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Supported nickel tungsten bimetallic composite oxide and preparation method and application thereof

A composite oxide and bimetallic technology, which is applied in the direction of metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, carbon compounds, etc., can solve the problems of low oxygen carrying capacity, complex preparation methods, Low hydrogen production efficiency and other problems, to achieve the effect of easy large-scale use, simple and easy preparation method, high hydrogen production efficiency

Active Publication Date: 2017-06-30
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The present invention aims to solve the technical problems of high reaction temperature, low reaction activity and low hydrogen production efficiency of single metal oxides, low oxygen carrying capacity of composite metal oxides, complex preparation methods and high cost in the existing chemical chain hydrogen production technology , providing a supported nickel-tungsten bimetallic composite oxide and its preparation method and its application in three-bed autothermal reforming of low-carbon alkanes and other fuels to directly produce hydrogen and carbon dioxide, coupling NiO metal oxide chemical looping combustion, Catalytic reforming of reduced Ni and reduced WO x (0≤x<3) The advantages of metal oxide pyrolysis water to produce high-purity hydrogen and gas-solid countercurrent operation type three-bed reactor autothermal reforming, the use of a simple, low-cost co-precipitation preparation method to achieve fuel direct Conversion to carbon dioxide and production of high-purity hydrogen and near-zero energy in-situ separation of products

Method used

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  • Supported nickel tungsten bimetallic composite oxide and preparation method and application thereof
  • Supported nickel tungsten bimetallic composite oxide and preparation method and application thereof
  • Supported nickel tungsten bimetallic composite oxide and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] (1) Weigh 1.9828g tungsten hexachloride (WCl 6 ), 12.7903g of aluminum nitrate nonahydrate (Al(NO 3 ) 3 9H 2 O) and 0.7270g of nickel nitrate hexahydrate (Ni(NO 3 ) 2 ·6H 2 O) dissolved in 50mL ethanol, ultrasonic 0.5h;

[0051] (2) Take 20g of NaOH and set the volume to 1M with a 500mL volumetric flask;

[0052] (3) Under the condition of magnetic stirring, slowly drop and mix the solution prepared in step 1 and step 2 at the same time until the pH is 9-10, and let the obtained flocculent precipitate stand at room temperature for 1 hour;

[0053] (4) Centrifuge, filter, and wash the flocculent precipitate in (3) with ethanol and distilled water successively for 5-6 times until the pH is 7-8;

[0054] (5) Dry the material obtained in (4) at room temperature for 12 hours, then dry it at 70-90°C for 12 hours, and finally bake it in an air atmosphere at 800°C for 4 hours to obtain a nickel-tungsten bimetallic composite oxide supported on alumina , whose molecular f...

Embodiment 2

[0056] (1) Weigh 1.9828g tungsten hexachloride (WCl 6 ) and 12.7903g of aluminum nitrate nonahydrate (Al(NO 3 ) 3 9H 2 O) dissolved in 50mL ethanol, ultrasonic 0.5h;

[0057] (2) Take 20g of NaOH and set the volume to 1M with a 500mL volumetric flask;

[0058] (3) Under the condition of magnetic stirring, slowly drop and mix the solution prepared in step 1 and step 2 at the same time until the pH is 9-10, and let the obtained flocculent precipitate stand at room temperature for 1 hour;

[0059] (4) Centrifuge, filter, and wash the flocculent precipitate in (3) with ethanol and distilled water successively for 5-6 times until the pH is 7-8;

[0060] (5) Dry the material obtained in (4) at room temperature for 12 hours, then dry it at 70-90°C for 12 hours, and finally bake it in an air atmosphere at 800°C for 4 hours to obtain tungsten oxide supported on alumina, whose molecular formula is WO 3 / Al 2 o 3 .

Embodiment 3

[0062] (1) Weigh 1.9828g tungsten hexachloride (WCl 6 ), 12.7903g of aluminum nitrate nonahydrate (Al(NO 3 ) 3 9H 2 O) and 0.4847 nickel nitrate hexahydrate (Ni(NO 3 ) 2 ·6H 2 O) dissolved in 50mL ethanol, ultrasonic 0.5h;

[0063] (2) Take 20g of NaOH and set the volume to 0.5M with a 500mL volumetric flask;

[0064] (3) Under the condition of magnetic stirring, the solution prepared in step 1 and step 2 was slowly added dropwise and mixed at the same time until the pH was 9-10, and the obtained flocculent precipitate was left to stand at room temperature for 2 hours;

[0065] (4) Centrifuge, filter, and wash the flocculent precipitate in (3) with ethanol and distilled water successively for 5-6 times until the pH is 7-8;

[0066] (5) Dry the material obtained in (4) at room temperature for 8 hours, then dry it at 70-90°C for 8 hours, and finally bake it in an air atmosphere at 600°C for 5 hours to obtain a nickel-tungsten double metal composite oxide supported on alum...

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Abstract

The invention belongs to the technical field of chemical looping hydrogen, and discloses supported nickel tungsten bimetallic composite oxide and a preparation method and an application thereof. A molecular formula is NiyW1O3+y / Al2O3, y is 0.3-1; the preparation method comprises the following steps: completely mixing nickel nitrate hexahydrate, tungsten hexachloride and aluminum nitrate nonahydrate in ethanol according to proportion and then dissolving the materials; then dropping a NaOH aqueous solution and mixing with a mixture, after standing, performing centrifugal filtration on a flocculent precipitate and washing the material; and drying and roasting the material to obtain the product. The supported nickel tungsten bimetallic composite oxide can be used for tribed self-heating gasification with light alkane, and reforming and direct production of hydrogen and carbon dioxide. The advantages of chemical looping combustion, catalytic reforming and high purity hydrogen production by pyrolysis water, and self-heating reforming of a gas-solid counter current operation-type tribed reactor are combined, the coprecipitation preparation method having the advantages of simple operation and low cost is used, so that fuel can be directly converted to carbon dioxide and high purity hydrogen, and near-zero energy consumption in-situ separation of the product is realized.

Description

technical field [0001] The invention belongs to the technical field of chemical chain hydrogen production by using metal oxides, in particular, it relates to a double metal oxide and its preparation method as well as its application for self-heating direct hydrogen production and carbon dioxide separation. Background technique [0002] With the sharp increase in global energy demand and the intensification of greenhouse gas emissions, the deployment of hydrogen energy industry has become one of the important strategies to solve the sustainable development of society, economy and environment. Hydrogen has a wide range of uses, and can be used in the synthesis and upgrading of liquid fuels to replace traditional petroleum to produce gasoline and diesel. At the same time, proton exchange membrane fuel cells using hydrogen as fuel have high energy conversion efficiency, and the by-product is only water. The power core of a new generation of vehicles. [0003] As a secondary ene...

Claims

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Application Information

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IPC IPC(8): B01J23/888C01B3/40C01B32/50
CPCB01J23/002B01J23/888B01J2523/00C01B3/40C01B2203/0233C01B2203/1058C01B2203/1082B01J2523/31B01J2523/69B01J2523/847Y02P20/52Y02P30/00
Inventor 巩金龙陈赛曾亮田昊李昕煜
Owner TIANJIN UNIV
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