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

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Problems solved by technology

However, its catalytic activity and stability cannot well meet the needs of

Method used

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

Examples

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Example Embodiment

[0031] Example 1

[0032] Ni / Ce 0.25 Zr 0.75 O 2 The particle catalyst is prepared as follows:

[0033](1) The Ce:Zr (molar ratio) is 1:3 Ce(NO 3 ) 3 ·6H 2 O, Zr(NO 3 ) 3 ·3H 2 O is dissolved in metered deionized water and configured into a solution with a concentration of 0.5 mol / L;

[0034] (2) Dilute industrial ammonia water with a concentration of 25% by 2 times as a precipitating agent. Under continuous stirring, add the salt solution obtained in (1) dropwise to the precipitating agent, control pH=9, and after the precipitation is complete, age at room temperature For 12h, wash with deionized water twice, replace the water in the obtained precipitate with absolute ethanol, supercritically dry, and calcinate at 800℃ for 6h to prepare Ce 0.25 Zr 0.75 O 2 Nano-cerium-zirconium composite oxide carrier, 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) with a nickel content of 5% of the catalyst mass...

Example Embodiment

[0037] Example 2

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

[0039] Steps (1), (2), (3) are the same as in Example 1. Weigh 10 g of catalyst powder, add 10 ml of deionized water, and ball mill for 12 hours to prepare a catalyst slurry. The solid content of the slurry is 30%-60%. The 400cpsi cordierite ceramic honeycomb carrier is made into a cylinder with a length of 10mm, a width of 10mm, and a height of 30mm. The blank substrate is immersed in the catalyst slurry for 5 minutes. After taking it out, the excess slurry on the substrate is purged with compressed air , Dried at 100℃ for 12h, calcined at 500℃ for 10h, and Ni / Ce is obtained 0.25 Zr 0.75 O 2 Monolithic catalyst for steam reforming of methane to produce hydrogen. It was packed in a fixed-bed quartz reactor to evaluate the activity and stability of the catalyst. The methane conversion rate at 750°C reached 97.8%.

Example Embodiment

[0040] Example 3

[0041] Ni-Ru / MgO-Ce 0.143 Zr 0.857 O 2 The particle catalyst is prepared as follows:

[0042] (1) The Ce:Zr (molar ratio) is 1:6 Ce(NO 3 ) 3 ·6H 2 O, Zr(NO 3 ) 3 ·3H 2 O is dissolved in metered deionized water and configured into a solution with a concentration of 0.5 mol / L;

[0043] (2) Dilute industrial ammonia water with a concentration of 25% by 2 times as a precipitating agent. Under continuous stirring, add the salt solution obtained in (1) dropwise to the precipitating agent, control pH=8, and after the precipitation is complete, age at room temperature For 12h, wash with deionized water for 3 times, replace the water in the obtained precipitate with absolute ethanol, supercritically dry, and calcinate at 650℃ for 6h to prepare 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, mostly 5-10nm;

[0044] (3) Dissolve nickel oxalate with a nickel content of 5% of the catal...

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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 catalyst for hydrogen production by steam reforming of methane and a preparation method thereof, in particular to a catalyst for hydrogen production by steam reforming of methane using 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. Hydrogen, as an efficient and clean secondary energy source, will become one of the main energy sources in the future society. In recent years, hydrogen has new uses. As fuel for fuel cells, it has incomparable advantages compared with other fuels, such as high calorific value of hydrogen, no air pollution, etc. The application of hydrogen energy solves the energy shortage on the one hand. On the other hand, it does not cause environmental pollution. Methane reforming is the main traditional method of ...

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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