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Complex nano-catalyst for preparing synthesis gas by reforming methane and carbon dioxide, and preparation method thereof

A carbon dioxide and nano-composite technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as catalyst bed blockage, activity decline, and high price , to achieve good activity and stability, increase active centers, and high surface defects

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, noble metal catalysts have the advantages of high catalytic activity and strong anti-carbon deposition performance, but they also have the disadvantages of high price, easy sintering and loss under high temperature conditions
Nickel-based catalysts have good catalytic activity, but are prone to activity decline and catalyst bed blockage due to carbon monoxide disproportionation at high temperature

Method used

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  • Complex nano-catalyst for preparing synthesis gas by reforming methane and carbon dioxide, and preparation method thereof
  • Complex nano-catalyst for preparing synthesis gas by reforming methane and carbon dioxide, and preparation method thereof
  • Complex nano-catalyst for preparing synthesis gas by reforming methane and carbon dioxide, and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Weigh 57g of aluminum nitrate, 40.5g of zirconium nitrate, 4.1g of cobalt acetate, and 0.42g of lanthanum nitrate, dissolve them in 500ml of water and stir for 10min to obtain solution A. Weigh 72g of urea, 16ml of ammonia water and dissolve in 500ml of water, then add 14.2g of basic nickel carbonate to obtain solution B. Solution A and solution B were mixed uniformly in an ultrasonic oscillator in parallel flow, the frequency of the ultrasonic wave was 25 kHz, and the mixed solution C was obtained by oscillating for 15 minutes. Move the solution C to a microwave reactor with a filling volume of no more than 80%, heat it at 180°C for 30 minutes, cool it down to room temperature naturally, pour it into a centrifuge for washing, and dry it at 120°C for 24 hours. The obtained catalyst powder was mixed with 0.8g of scallop powder and 0.7g of citric acid, extruded and roasted, heated to 400°C at a rate of 2°C / min, roasted at a constant temperature for 2 hours, and then roast...

Embodiment 2

[0039]Weigh 40.5g of zirconium nitrate, 1.1g of cobalt acetate, 0.85g of lanthanum nitrate, and 39.6g of colloidal silica, dissolve them in 500ml of water and stir for 20min to obtain solution A. Weigh 60g of urea, 12ml of ammonia water and dissolve in 500ml of water, then add 10.5g of basic nickel carbonate to obtain solution B. Solution A and solution B were mixed uniformly in an ultrasonic oscillator in parallel flow, the frequency of the ultrasonic wave was 45 kHz, and the mixed solution C was obtained by oscillating for 20 minutes. Move the solution C to a microwave reactor with a filling volume of no more than 80%, heat it at 160°C for 15 minutes, cool it down to room temperature naturally, pour it into a centrifuge for washing, and dry it in vacuum at 80°C for 36 hours. The obtained catalyst powder was mixed with 0.7 g of scallop powder and 0.6 g of citric acid, extruded and roasted, heated to 400 °C at a rate of 1 °C / min, roasted at a constant temperature for 2 hours, ...

Embodiment 3

[0041] Weigh 104g of aluminum nitrate, 40.5g of zirconium nitrate, 5.9g of cobalt sulfate, and 2.33g of lanthanum nitrate, dissolve them in 500ml of water and stir for 15min to obtain solution A. Weigh 89.7g of urea, 18ml of ammonia water and dissolve in 500ml of water, then add 18.2g of basic nickel carbonate to obtain solution B. Solution A and solution B were mixed uniformly in an ultrasonic oscillator in parallel flow, the frequency of the ultrasonic wave was 30 kHz, and the mixed solution C was obtained by oscillating for 25 minutes. Move the solution C to a microwave reactor with a filling volume of no more than 80%, heat it at 100°C for 60 minutes, cool it down to room temperature naturally, pour it into a centrifuge for washing, and dry it in vacuum at 80°C for 72 hours. The obtained catalyst powder was mixed with 1.2 g of scallop powder and 0.9 g of citric acid, extruded and roasted, heated to 450 ° C at a rate of 2 ° C / min, roasted at a constant temperature for 1 h...

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Abstract

The invention belongs to the field of catalyst preparation, and particularly relates to a complex nano-catalyst for preparing synthesis gas by reforming methane and carbon dioxide, and a preparation method thereof. The complex nano-catalyst comprises an active ingredient, an accessory ingredient and a complex carrier, wherein the active ingredient is composed of cobalt oxide and nickel oxide; the accessory ingredient is composed of one or more of potassium oxide, magnesium oxide or lanthanum oxide; the complex carrier is composed of two of nano aluminium oxide, nano zirconium oxide or nano silicon oxide. The preparation method comprises the following steps: preparing a mixed solution; preparing the complex nano-catalyst. The complex nano-catalyst is small in particle diameter of the complex carrier, has high surface energy and surface defects, increases catalyst active sites, activates carbon dioxide to generate active oxygen, assists carbon elimination, reduces the yield of carbon, slightly improves stability of the complex nano-catalyst, and prolongs the use period of the complex nano-catalyst; the preparation method is simple, scientific and reasonable.

Description

technical field [0001] The invention belongs to the field of catalyst preparation, and in particular relates to a nanocomposite catalyst for producing synthesis gas by reforming methane and carbon dioxide and a preparation method thereof. Background technique [0002] With the increasing severity of the greenhouse effect, people pay more and more attention to limiting the emission of greenhouse gases. Carbon dioxide is one of the main causes of the greenhouse effect and the deterioration of the global climate. With the development of the chemical industry, the carbon dioxide content in the atmosphere will become higher and higher. The content of carbon dioxide in the atmosphere alone reaches 100 trillion tons, and the amount of carbon dioxide emitted into the atmosphere by the world every year reaches 185*10 8 tons, and grow at a rate of 4% per year. Therefore, how to reduce carbon dioxide emissions and develop carbon dioxide resource utilization is a huge challenge for m...

Claims

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Application Information

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IPC IPC(8): B01J23/755B01J23/83B01J23/78C01B3/40
CPCY02P20/52
Inventor 薛红霞王昊姜建波白志敏赵庆鲁齐焕东江秀玲梁卫忠余汉涛
Owner CHINA PETROLEUM & CHEM CORP
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