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Application of alumina-loaded Ni catalyst with specific microstructure in preparation of synthesis gas by plasma catalytic methane dry reforming

A methane dry reforming and plasma technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, hydrogen/synthesis gas production, etc., can solve the problem of low selectivity and poor directional conversion ability and other problems, to achieve the effect of increasing the specific surface area and improving the anti-sintering ability.

Active Publication Date: 2022-03-29
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the chemical reactions directly induced by plasma generally have the problems of poor directional conversion ability of reactants to target products and low selectivity.

Method used

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  • Application of alumina-loaded Ni catalyst with specific microstructure in preparation of synthesis gas by plasma catalytic methane dry reforming
  • Application of alumina-loaded Ni catalyst with specific microstructure in preparation of synthesis gas by plasma catalytic methane dry reforming
  • Application of alumina-loaded Ni catalyst with specific microstructure in preparation of synthesis gas by plasma catalytic methane dry reforming

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Catalyst preparation:

[0043] (1) Preparation of nano-flaky alumina (NS-Al 2 o 3 ): 6.0g aluminum nitrate and 9.0g urea dissolved in 120mLH 2 O, stirred at 400r / min for 30min, poured the mixed solution into a 100mL hydrothermal reactor, and reacted at 100°C for 48h. After the reaction, the reactor was naturally cooled to room temperature, filtered and washed three times with water, then the filter cake was freeze-dried at minus 50°C for 72 hours, and finally roasted at 600°C for 2 hours in an air atmosphere.

[0044] (2) Preparation of nanosheet-like alumina-supported Ni catalyst (Ni / NS-Al 2 o 3 ): at first the massfraction of Ni is determined as 10%, at first measure the water absorption (2.0mL / g) of nanosheet aluminum oxide, then take by weighing 0.49g nickel nitrate and be dissolved in 2.0mL deionized water to obtain nickel nitrate solution, equal volume impregnation In 1.0g NS-Al 2 o 3 On the carrier, place it at room temperature for 24 hours, then place it ...

Embodiment 2

[0059] Catalyst preparation:

[0060] (1) Preparation of feathery alumina (F-Al 2 o 3 ): 3.7g aluminum nitrate and 7.2g urea dissolved in 60mL H 2 O, stirred at 500 r / min for 30 min, poured the mixed solution into a 100 mL hydrothermal reactor, and reacted at 120 °C for 10 h. After the reaction, the reactor was naturally cooled to room temperature, filtered and washed three times with water, then the filter cake was freeze-dried at minus 50°C for 72 hours, and finally roasted at 600°C for 2 hours in an air atmosphere.

[0061] (2) Preparation of feathery alumina supported Ni catalyst (Ni / F-Al 2 o 3 ): at first the mass fraction of Ni is determined as 10%, and the water absorption (1.6mL / g) of feathery alumina is measured, then 0.49g nickel nitrate is dissolved in 1.6mL deionized water to obtain nickel nitrate solution, equal volume impregnation In 1.0g F-Al 2 o 3 On the carrier, place it at room temperature for 24 hours, then freeze-dry it at minus 50°C for 48 hours, an...

Embodiment 3

[0065] Catalyst preparation:

[0066] (1) Preparation of spherical alumina (S-Al 2 o 3 ): 7.5g aluminum nitrate and 5.0g glucose dissolved in 60mL H 2 O, stirred at 500r / min for 30min, poured the mixed solution into a 100mL hydrothermal reactor, and reacted at 180°C for 20h. After the reaction, the reactor was naturally cooled to room temperature, filtered and washed three times with water, then the filter cake was freeze-dried at minus 50°C for 72 hours, and finally roasted at 600°C for 2 hours in an air atmosphere.

[0067] (2) Preparation of spherical alumina-supported Ni catalyst (Ni / S-Al 2 o 3 ): at first the mass fraction of Ni is determined as 10%, and the water absorption (1.2mL / g) of the spherical alumina is measured, then 0.49g nickel nitrate is dissolved in 1.2mL deionized water to obtain nickel nitrate solution, equal volume impregnated in 1.0g S-Al 2 o 3 On the carrier, place it at room temperature for 24 hours, then place it at minus 50°C for 48 hours and ...

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Abstract

The invention provides a method for improving reaction performance and energy efficiency of synthesis gas prepared by low-temperature methane dry reforming through coupling of plasma and a specific microstructure catalyst, and the method comprises the following steps: taking methane and carbon dioxide as raw materials, taking Ni / Al2O3 as a catalyst, carrying out reaction in a plasma reactor, and preparing the synthesis gas under mild conditions; and the Al2O3 is one or a mixture of more of nano sheet-shaped Al2O3, feather-shaped Al2O3, ball-flower-shaped Al2O3 and rod-shaped Al2O3 with different microstructures. The carriers with different structures directly influence dispersion, stability and discharge capacitance of Ni particles, so that the catalytic performance of Ni / Al2O3 under mild conditions is influenced. According to the method, the dispersity of metal Ni is remarkably improved, meanwhile, the energy efficiency of the catalyst and the discharge stability of the catalyst under the plasma discharge condition are improved, and efficient conversion of CH4 and CO2 under the mild condition is achieved.

Description

technical field [0001] The invention belongs to the field of producing synthesis gas by methane dry reforming reaction, and specifically relates to a preparation method for preparing a highly dispersed and loaded Ni-based catalyst using alumina with different microstructures as a carrier and its application in low-temperature plasma catalyzed methane dry reforming reaction performance Research. Background technique [0002] CH 4 and CO 2 They are two main small molecules of greenhouse gases, and their comprehensive utilization is crucial to alleviate the increasingly serious greenhouse effect and energy crisis. Among them, methane is the simplest hydrocarbon and the main component of natural gas. With the continuous improvement of mining shale gas (unconventional natural gas) technology, natural gas is expected to gradually replace coal and become the second largest fossil resource. In 2015, my country imported a total of 26.2 billion cubic meters of natural gas. At the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/40C01B3/34B01J35/02B01J23/755B01J21/04B01J35/00
CPCC01B3/40C01B3/342B01J23/755B01J21/04C01B2203/0238C01B2203/1058C01B2203/1082C01B2203/1241B01J35/393B01J35/40Y02P20/10Y02P20/52
Inventor 石川刁亚南张晓
Owner DALIAN UNIV OF TECH
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