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Preparation method of supported Ni-MoCx catalytic material and application of supported Ni-MoCx catalytic material to prepare synthetic gas by chemical-looping dry gas reforming

A catalytic material, supported technology, applied in chemical instruments and methods, inorganic chemistry, chemical industry, etc., can solve the problems of low single-pass conversion rate of methane, deactivation of catalyst carbon deposition, harsh reaction conditions, etc., to achieve high reaction performance, The effect of improving conversion rate and improving selectivity

Active Publication Date: 2019-06-18
DALIAN UNIV OF TECH
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Problems solved by technology

However, this reaction is also a strong endothermic reaction. The traditional CDR process has harsh reaction conditions and high energy consumption; at the same time, the reaction activity is low, the single-pass conversion rate of methane is low, and the carbon deposition and deactivation of the catalyst are serious under high temperature conditions.

Method used

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  • Preparation method of supported Ni-MoCx catalytic material and application of supported Ni-MoCx catalytic material to prepare synthetic gas by chemical-looping dry gas reforming
  • Preparation method of supported Ni-MoCx catalytic material and application of supported Ni-MoCx catalytic material to prepare synthetic gas by chemical-looping dry gas reforming
  • Preparation method of supported Ni-MoCx catalytic material and application of supported Ni-MoCx catalytic material to prepare synthetic gas by chemical-looping dry gas reforming

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Catalyst preparation:

[0030] 1) First measure γ-Al 2 o 3 The water absorption rate of the powder is 1.4ml H 2 O / gAl 2 o 3 . According to Ni: (Ni+Al 2 o 3 ) is 10% by mass, weigh 2gγ-Al 2 o 3 Powder sample and 0.35g nickel nitrate, then according to commercial γ-Al 2 o 3 The water absorption of the powder adopts the equal volume impregnation method to dissolve the above-mentioned nickel nitrate in 2.8ml deionized water to make a solution, and mix the above-mentioned Ni salt solution with commercial γ-Al 2 o 3 Mix the powders at room temperature and stir continuously with a glass rod for 1-2 hours, then dry at 100-150°C for 12-24 hours after aging at room temperature for 24 hours, and finally bake in a muffle furnace at 500°C for 4 hours in an air atmosphere, cool and grind After that, get Ni / Al 2 o 3 Matrix material.

[0031] 2) Weigh 1.8g MoO 3 at 20% CH 4 / H 2 Carbonization at 700°C in a mixed atmosphere, the gas flow rate of the mixed gas is 160ml / ...

Embodiment 3

[0053] The steps and process conditions of this embodiment are all the same as in Example 1, the difference is only in the following two points: 1. Weigh 1g10%Ni / Al 2 o 3 The matrix material and 3g molybdenum carbide material are mixed mechanically at room temperature according to the mass percentage of 1:3, fully ground in a mortar for 1-2 hours, and finally mixed in 15% CH 4 / H 2 Calcined at 500°C for 2 hours in a mixed atmosphere to prepare MoC x +10%Ni / Al 2 o 3 (SSI1 / 3) catalyst; ②Evaluate its activity. When the reaction temperature is 600°C, the initial conversion rate of methane is about 82%, and the initial conversion rate of carbon dioxide is about 75%. 2 The / CO ratio is about 3.0.

Embodiment 4

[0055] The steps and process conditions of this embodiment are all the same as in Example 1, the difference is only in the following two points, 1. Weigh 3g10%Ni / Al 2 o 3 The matrix material and 1g molybdenum carbide material are mixed mechanically at room temperature according to the mass percentage of 1:1, fully ground in a mortar for 1-2 hours, and finally mixed in 15% CH 4 / H 2 Calcined at 500°C for 2 hours in a mixed atmosphere to prepare MoC x +10%Ni / Al 2 o 3 (SSI3 / 1) catalyst; ②Evaluate its activity. When the reaction temperature is 600°C, the initial conversion rate of methane is about 75%, and the initial conversion rate of carbon dioxide is about 68%. 2 The / CO ratio is about 2.35.

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Abstract

The invention discloses a preparation method of a supported Ni-MoCx catalytic material and application of the supported Ni-MoCx catalytic material to prepare synthetic gas by chemical-looping dry gasreforming. The supported Ni-MoCx catalytic material comprises MoCx, a large-specific-surface commercial supporter and metal Ni, wherein MoCx accounts for 25-75% by mass, metal Ni accounts for 2.5-7.5%by mass, and the large-specific-surface commercial supporter mainly comprises gamma-Al2O3, SiO2, CeO2, BN, hydrotalcite and the like and accounts for 22.5-67.5% by mass. An oxygen carrier microscopicstructure is regulated and optimized by using the supported Ni-based catalytic material as a base and introducing the aid transition metal molybdenum carbide material; therefore, efficient methane-to-synthetic gas process is achieved. The supported Ni-MoCx catalytic material herein has excellent H2 / CO ratio (about 2-2.5) suitable for Fischer-Tropsch synthesis and excellent cycle stability, and helps improve energy conversion efficiency.

Description

technical field [0001] The present invention relates to a CH 4 -CO 2 The method of producing synthesis gas by chemical chain reforming and the application and preparation of new high-efficiency catalysts belong to CH 4 -CO 2 Technical field of reforming synthesis gas. Background technique [0002] The global oil resources are increasingly scarce, and the unclean use of energy by humans has led to increasingly serious environmental pollution. The global fossil energy industry revolution has begun. Natural gas is rich in reserves, wide in distribution and low in price. It is the third largest energy source in the world next to oil and coal. Converting it into high-value chemicals and high-energy chemical fuels is a promising solution to both energy shortages and environmental pollution. effective way. In recent years, with breakthroughs in shale gas and combustible ice mining technologies, the use of natural gas instead of oil to produce liquid fuels and basic chemicals h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/22C01B3/40
CPCY02P20/10Y02P20/52Y02P20/584
Inventor 石川张晓陈冰冰
Owner DALIAN UNIV OF TECH
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