Anti-carbon-deposition Ni-based catalyst for hydrogen production by methane steam reforming and preparation method thereof

A methane water vapor, reforming hydrogen production technology, applied in the field of catalysis, can solve the problems of unsatisfactory catalytic activity and stability, and achieve the effects of strong anti-carbon deposition, easy control of conditions, and low cost

Active Publication Date: 2014-04-30
NANCHANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its catalytic activity and stability cannot well meet the needs of the industrialization of hydrogen production by steam reforming of methane.

Method used

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  • Anti-carbon-deposition Ni-based catalyst for hydrogen production by methane steam reforming and preparation method thereof
  • Anti-carbon-deposition Ni-based catalyst for hydrogen production by methane steam reforming and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Ni / La 2 Zr 2 o 7 Particle catalyst, the preparation method is as follows:

[0032] (1) La(NO 3 ) 3 ·6H 2 O, Zr(NO 3 ) 3 ·3H 2 O is dissolved in metered deionized water to form a solution with a concentration of 0.5mol / L;

[0033] (2) Dilute the industrial ammonia water with a concentration of 25% to 1 times as a precipitating agent. Under continuous stirring, add the salt solution obtained in (1) dropwise to the above precipitating agent, control the pH=10, and after the precipitation is complete, let it stand at room temperature. After 12 hours, wash with deionized water until the TDS of the filtrate2 Zr 2 o 7 Composite oxide support, characterized by XRD, such as figure 1 As shown, the support has pyrochlore-type structure characteristic diffraction peaks; X-ray diffraction results show that catalysts with pyrochlore-type structures containing different rare earths have been synthesized.

[0034] (3) Ni(NO) with a nickel content of 12% catalyst mass 3 ) ...

Embodiment 2

[0037] Ni / Y 2 Zr 2 o 7 Particle catalyst, the preparation method is as follows:

[0038] (1) Y(NO) with Y:Zr (molar ratio) of 1:1 3 ) 3 ·6H 2 O, Zr(NO 3 ) 3 ·3H 2 O is dissolved in metered deionized water to form a solution with a concentration of 0.5mol / L;

[0039] (2) Dilute the industrial ammonia water with a concentration of 25% to 1 times as a precipitating agent. Under continuous stirring, add the salt solution obtained in (1) dropwise to the above precipitating agent, control the pH=10, and after the precipitation is complete, let it stand at room temperature. After 12 hours, wash with deionized water until the TDS of the filtrate2 Zr 2 o 7 Composite oxide support, characterized by XRD, such as figure 1 As shown, the carrier has pyrochlore-type structure characteristic diffraction peaks;

[0040] (3) Ni(NO) with a nickel content of 12% catalyst mass 3 ) 3 ·6H 2 O was dissolved in metered deionized water, and the prepared carrier was impregnated in metered...

Embodiment 3

[0043] Ni / Pr 2 Zr 2 o 7 Particle catalyst, the preparation method is as follows:

[0044] (1) Pr(NO 3 ) 3 ·6H 2 O, Zr(NO 3 ) 3 ·3H 2 O is dissolved in metered deionized water to form a solution with a concentration of 0.5mol / L;

[0045] (2) Dilute the industrial ammonia water with a concentration of 25% to 1 times as a precipitating agent. Under continuous stirring, add the salt solution obtained in (1) dropwise to the above precipitating agent, control the pH=10, and after the precipitation is complete, let it stand at room temperature. After 12 hours, wash with deionized water until the TDS of the filtrate2 Zr 2 o 7 Composite oxide support, characterized by XRD, such as figure 1 As shown, the carrier has pyrochlore-type structure characteristic diffraction peaks;

[0046] (3) Ni(NO) with a nickel content of 12% catalyst mass 3 ) 3 ·6H 2 O was dissolved in metered deionized water, and the prepared carrier was impregnated in metered nickel salt solution by equal...

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Abstract

The invention relates to an anti-carbon-deposition Ni-based catalyst for hydrogen production by methane steam reforming and a preparation method thereof. By taking lanthanum nitrate, praseodymium nitrate, samarium nitrate, yttrium nitrate, zirconium nitrate, zirconium carbonate, zirconium oxychloride, and the like as precursors and taking ammonia as a precipitant, a pyrochlore composite oxide is prepared through using a coprecipitation method; and then the pyrochlore composite oxide is mixed with alumina by using a mechanical mixing method so as to obtain a pyrochlore alumina composite carrier. Nickel nitrate, nickel chloride, nickel sulfate, nickel oxalate and the like serving as nickel sources are loaded on the pyrochlore alumina composite carrier through direct immersion. The loading capacity of nickel in the catalyst accounts for 5-30% of the weight of the catalyst, the pyrochlore content of the catalyst is 5-50%, and the alumina content of the catalyst is 20-90%. By taking the pyrochlore alumina composite oxide as a carrier, the reaction activity and anti-carbon-deposition performance of the catalyst can be greatly increased; the preparation method of the catalyst is simple; and the catalyst has excellent catalytic activity and stability to methane steam reforming in a stationary bed.

Description

technical field [0001] The invention belongs to the field of catalysis, and relates to a hydrogen production catalyst for steam reforming of methane. Background technique [0002] Hydrogen is an important industrial raw material and reducing agent. It is widely used in various fields of national economy, such as fertilizer, petrochemical, food, fine chemical, pharmaceutical, electronics, metallurgy, scientific research and other industries. At the same time, hydrogen is also an important green new energy. As an energy source, hydrogen energy will play a pivotal role on the world energy stage in the 21st century. It is an extremely superior new energy source. Its main advantages are high combustion calorific value; the only product of combustion is water, which is very clean; it can be made from water, and its resources are relatively abundant. But because hydrogen is a secondary energy source, there is no free pure hydrogen in nature and the atmosphere, its production not ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B01J23/835C01B3/40
CPCY02P20/52
Inventor 王翔马友河刘文明徐香兰方修忠李常清周武风袁萍陈晓红
Owner NANCHANG UNIV
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