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Catalyst for hydrogen production from methane vapor reforming and preparing method thereof

A methane water vapor, reforming hydrogen production technology, applied in chemical instruments and methods, hydrogen, inorganic chemistry, etc., can solve the problems of catalytic activity and stability that cannot be well satisfied, and achieve the improvement of catalytic activity and stability, Effects of increased specific surface area and easy control of conditions

Inactive Publication Date: 2008-07-23
HANERGY TECH
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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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  • Catalyst for hydrogen production from methane vapor reforming and preparing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Ni / Ce 0.25 Zr 0.75 o 2 Particle catalyst, the preparation method is as follows:

[0033](1) Ce(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;

[0034] (2) Dilute industrial ammonia water with a concentration of 25% twice as a precipitating agent, add the salt solution obtained in (1) dropwise to the precipitating agent under continuous stirring, control the pH=9, after the precipitation is complete, let it stand at room temperature After 12 h, wash twice with deionized water, replace the water in the resulting precipitate with absolute ethanol, supercritically dry, and roast at 800 °C for 6 h to obtain Ce 0.25 Zr 0.75 o 2 Nano-cerium-zirconium composite oxide support, characterized by TEM, such as figure 1 As shown, the particle diameter of the carrier is 5-20nm, mostly 5-10nm;

[0035] (3) Ni(NO 3 ) 3 ·6H 2 O was dissolved in metered deionized water, and the prepared car...

Embodiment 2

[0038] Ni / Ce 0.25 Zr 0.75 o 2 Monolithic catalyst, the preparation method is as follows:

[0039] Steps (1), (2) and (3) are the same as in Example 1, weighing 10 g of catalyst powder, adding 10 ml of deionized water, and ball milling for 12 hours to prepare a catalyst slurry with a solid content of 30%-60%. Make a 400cpsi cordierite ceramic honeycomb carrier into a cylinder with a length of 10mm, a width of 10mm, and a height of 30mm. Put the blank substrate into the catalyst slurry and immerse it for 5min. After taking it out, blow off the excess slurry on the substrate with compressed air , dried at 100°C for 12h and calcined at 500°C for 10h to obtain Ni / Ce 0.25 Zr 0.75 o 2 Monolithic catalyst for hydrogen production by steam reforming of methane. It was loaded into a fixed-bed quartz reactor to evaluate the activity and stability of the catalyst, and the methane conversion rate reached 97.8% at 750°C.

Embodiment 3

[0041] Ni-Ru / MgO-Ce 0.143 Zr 0.857 o 2 Particle catalyst, the preparation method is as follows:

[0042] (1) Ce(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;

[0043] (2) Dilute the industrial ammonia water with a concentration of 25% twice as a precipitating agent, add the salt solution obtained in (1) dropwise to the above precipitating agent under continuous stirring, control the pH=8, after the precipitation is complete, let it stand at room temperature After 12 h, wash with deionized water for 3 times, replace the water in the resulting precipitate with absolute ethanol, supercritically dry, and roast at 650 ° C for 6 h to obtain Ce 0.143 Zr 0.857 o 2 Nano-cerium-zirconium composite oxide carrier, characterized by TEM, the particle diameter of the carrier is 5-20nm, most of which are 5-10nm;

[0044] (3) dissolving nickel oxalate whose nickel content is 5% of catalyst mass in ...

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Abstract

The invention discloses a methane reforming catalyst for the production of hydrogen and a preparation method thereof, which more particularly relates to a Ni methane vapor reforming catalyst for the production of hydrogen which takes a nanometer cerium zirconium composite oxide as the carrier and the corresponding preparation method, and belongs to the methane reforming catalyst field. The catalyst comprises 5-30 wt% of active Ni, 0-10 wt% of noble metal catalytic promoter, 0-10 wt% of rare earth and / or the catalytic promoter of alkaline earth oxide, 50-95 wt% of nanometer cerium zirconium composite oxide carrier with the particle diameter of 5-20 nm. The invention is characterized by simple preparation method, high reactivity, strong anti carbon performance, good stability, low cost, etc.; when the invention is applied to the methane vapor reforming catalyst for producing hydrogen, the requirements of industrialization on catalyst reactivity and usage life can be satisfied. The invention can be largely applied in fuel cell-hydrogen area.

Description

Technical field [0001] The invention relates to a methane steam reforming hydrogen production catalyst and a preparation method thereof, specifically to a nickel-based methane steam reforming hydrogen production catalyst with nanometer cerium-zirconium composite oxide as a carrier and a preparation method thereof. Background technique [0002] Methane is rich in resources and has a high hydrogen-to-carbon ratio, making it a good raw material for hydrogen production. As an efficient and clean secondary energy, hydrogen will become one of the main energy sources in the future society. In recent years, hydrogen has found new uses. As a fuel for fuel cells, it has incomparable advantages over other fuels, such as hydrogen's high calorific value and no air pollution. The application of hydrogen energy solves energy shortages on the one hand. problem, on the other hand, it does not cause environmental pollution. Methane reforming is the traditional main hydrogen production metho...

Claims

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Application Information

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IPC IPC(8): B01J23/83B01J23/89C01B3/40
CPCY02P20/52
Inventor 肖钢喻瑶周帅林
Owner HANERGY TECH
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