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Preparation method of high-efficiency nickel-based catalyst for producing hydrogen in methanol-steam reforming

A technology for producing hydrogen from methane steam and reforming, which is applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc. The preparation method is simple, the activity is stable, and the conditions are easy to control.

Active Publication Date: 2015-10-14
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using pyrochlore as the carrier of Ni in the active center can effectively improve the high-temperature thermal stability of the catalyst, but because the pyrochlore prepared by the conventional co-precipitation synthesis method needs to form a pyrochlore crystal phase at a relatively high temperature, the obtained The carrier specific surface of the carrier is usually smaller, the present invention utilizes the glycine-nitrate combustion method to synthesize the pyrochlore carrier, improves the specific surface of the carrier and optimizes the structural performance of the catalyst, and the glycine-nitrate combustion method synthesizes the pyrochlore carrier to support the Ni-based catalyst There are few reports on the steam reforming of methane

Method used

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  • Preparation method of high-efficiency nickel-based catalyst for producing hydrogen in methanol-steam reforming
  • Preparation method of high-efficiency nickel-based catalyst for producing hydrogen in methanol-steam reforming

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Ni / Y 2 Zr 2 o 7 Particle catalyst, the preparation method is as follows:

[0025] (1) Y(NO) with Y:Zr (molar ratio) of 1:1 3 ) 3 ·6H 2 O, Zr(NO 3 ) 4 ·5H 2 O is dissolved in metered deionized water to form a solution with a concentration of 0.5mol / L;

[0026] (2) Dilute industrial ammonia water with a concentration of 25% to 1 time as a precipitant, and slowly add ammonia water dropwise to the above solution (1) to pH = 2-3 under continuous stirring at 40 ° C, and after stirring for 1 hour, at 80 Evaporate in an oven at ℃ to form a gel, rise to the ignition temperature of 200℃ until the combustion reaction occurs; dry the combustion product at 110℃ for 12 hours, and bake in a high-temperature furnace at 800℃ for 4 hours. The furnace temperature setting program is: room temperature at 2℃ / min to the target temperature of 800°C. Produced rare earth Y 2 Zr 2 o 7 Pyrochlore composite oxide support, characterized by XRD, such as figure 1 As shown, the carrier h...

Embodiment 2

[0030] Ni / La 2 Zr 2 o 7 Particle catalyst, the preparation method is as follows:

[0031] (1) La(NO 3 ) 3 ·6H 2 O, Zr(NO 3 ) 4 ·5H 2 O is dissolved in metered deionized water to form a solution with a concentration of 0.5mol / L;

[0032] (2) Dilute industrial ammonia water with a concentration of 25% to 1 time as a precipitant, and slowly add ammonia water dropwise to the above solution (1) to pH = 2-3 under continuous stirring at 40 ° C, and after stirring for 1 hour, at 80 Evaporate in an oven at ℃ to form a gel, rise to the ignition temperature of 300℃ until the combustion reaction occurs; dry the combustion product at 110℃ for 12 hours, and bake in a high-temperature furnace at 800℃ for 4 hours. The furnace temperature setting program is: room temperature at 2℃ / min to reach the target temperature. Rare earth La 2 Zr 2 o 7 Pyrochlore composite oxide support, characterized by XRD, such as figure 1 As shown, the carrier has pyrochlore-type structure characterist...

Embodiment 3

[0036] Ni / Sm 2 Zr 2 o 7 Particle catalyst, the preparation method is as follows:

[0037] (1) Sm(NO 3 ) 3 ·6H 2 O, Zr(NO 3 ) 4 ·5H 2 O is dissolved in metered deionized water to form a solution with a concentration of 0.5mol / L;

[0038] (2) Dilute industrial ammonia water with a concentration of 25% to 1 time as a precipitant, and slowly add ammonia water dropwise to the above solution (1) to pH = 2-3 under continuous stirring at 40 ° C, and after stirring for 1 hour, at 80 Evaporate in an oven at ℃ to form a gel, rise to the ignition temperature of 300℃ until the combustion reaction occurs; dry the combustion product at 110℃ for 12 hours, and bake in a high-temperature furnace at 800℃ for 4 hours. The furnace temperature setting program is: room temperature at 2℃ / min to reach the target temperature. Produced rare earth Y 2 Zr 2 o 7 Pyrochlore composite oxide support, characterized by XRD, such as figure 1 As shown, the carrier has pyrochlore-type structure char...

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Abstract

The invention discloses a preparation method of a high-efficiency nickel-based catalyst for producing hydrogen in methanol-steam reforming. According to the preparation method, a pyrochlore compounding oxide is prepared through a glycine-nitrate combustion method; metal nitrate or perchlorate is adopted as an oxidizing agent; an organic matter is used as fuel; self-propagating combustion is generated through an oxidation-reduction reaction between reaction mixtures; a pyrochlore-type composite oxide carrier is synthesized by utilizing the heat generated during combustion. Nickel nitrate, nickel sulfate, nickel oxalate, and the like are used as nickel sources, and the nickel sources are loaded on the pyrochlore-type composite oxide carrier by a direct immersion method. The loading quantity of nickel in the catalyst is 5-20 wt% of the catalyst, and the content of pyrochlore is 80-95% of the catalyst. The composite oxide, namely pyrochlore alumina, is utilized as a carrier, so that the reaction activity and the carbon-deposition resisting performance of the catalyst can be greatly improved; besides, the preparation method of the catalyst is simple, and the catalyst has high catalytic activity and stability for methanol-steam reforming in a stationary bed.

Description

technical field [0001] The invention relates to a preparation method of a rare earth pyrochlore-loaded Ni-based catalytic material and its application in steam reforming of methane. Background technique [0002] The development of new energy is imminent in today's world. Oil, natural gas, and coal are all non-renewable resources. The reserves on the earth are limited, and their reserves are also decreasing. One day these resources will be exhausted, and human survival is always inseparable from energy. Therefore New sources of energy must be found. Hydrogen energy, as a clean green energy, is attracting people's attention. Experts believe that in the next few years, people's demand for hydrogen energy will greatly exceed non-renewable resources such as oil and coal. Hydrogen is an important industrial raw material and reducing agent, such as fertilizer, petrochemical, food, fine chemical, pharmaceutical, electronics, metallurgy, scientific research and other industries are...

Claims

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Application Information

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IPC IPC(8): B01J23/83C01B3/40
CPCY02P20/52
Inventor 王翔方修忠陈盟盟刘文明
Owner NANCHANG UNIV
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