Hydrogen production catalyst with high-temperature methyl alcohol water vapour and preparation method thereof

A steam reforming and catalyst technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve the problem of effective utilization of unfavorable active components and precious metals, and preparation methods Complexity, high precious metal content, etc., to achieve the effect of less precious metal consumption, simple preparation method, and low precious metal consumption

Active Publication Date: 2010-01-27
HANERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its disadvantage is that the precious metal content is still high, and the preparation method is relatively complicated. The direct coating method is not conducive to the effective utilization of the active component precious metal.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Pd / ZnO-Al 2 o 3 Catalyst, preparation method is as follows:

[0027] (1) Pd(NO 3 ) 2 .H 2 O is dissolved in metered dilute nitric acid, heated up to 60°C, stirred to make it completely dissolved, and concentrated to a solution with a Pd concentration of 20wt% for subsequent use; Zn(NO 3 ) 2 Dissolve in metered deionized water and prepare a 1.5mol / L solution for later use;

[0028] (2) Weigh a certain amount of Al 2 o 3 Beads, immersed in quantitative 0.5wt% La(NO 3 ) 3 ? h 2 O dilute solution, keep 12h under normal temperature, after impregnating, dry for subsequent use;

[0029] (3) Under continuous stirring and ultrasonic dispersion, add the two salt solutions prepared in (1) to the above-mentioned modified Al 2 o 3 On the small ball, make the solution completely absorbed by the small ball, measure the Pd loading to account for 5wt% of the carrier, and keep it at 60°C for 1h;

[0030] (4) Dry the prepared catalyst pellets at 110°C and calcinate at 450°C...

Embodiment 2

[0032] Pt / ZnO-Al 2 o 3 Catalyst, preparation method is as follows:

[0033] (1) Pt(NO 3 ) 2 .H 2 O is dissolved in metered dilute nitric acid, heated up to 30°C, stirred to make it completely dissolved, and concentrated to a solution with a Pt concentration of 5wt% for subsequent use; Zn(NO 3 ) 2 Dissolve in metered deionized water and prepare a 1mol / L solution for later use;

[0034] (2) Weigh a certain amount of Al 2 o 3 Pellets, immersed in quantitative 1.5wt% Ce(NO 3 ) 3 ? h 2 O dilute solution, keep 3h under normal temperature, after impregnating, dry for subsequent use;

[0035] (3) Under continuous stirring and ultrasonic dispersion, add the two salt solutions prepared in (1) to the above-mentioned modified Al 2 o 3 On the small ball, make the solution completely absorbed by the small ball, measure the Pt loading to account for 2.6wt% of the carrier, and keep it at 40°C for 0.5h;

[0036] (4) Dry the prepared catalyst pellets at 100°C and calcinate at 250...

Embodiment 3

[0038] Rh / ZnO-Al 2 o 3 Catalyst, preparation method is as follows:

[0039] (1) Rh(NO 3 ) 3 .H 2 O is dissolved in metered dilute nitric acid, heated up to 80°C, stirred to make it completely dissolved, and concentrated to a solution with a Rh concentration of 30wt% for subsequent use; Zn(NO 3 ) 2Dissolve in metered deionized water and prepare a 4mol / L solution for later use;

[0040] (2) Weigh a certain amount of Al 2 o 3 Beads, immersed in quantitative 3wt% Y(NO 3 ) 3 ? h 2 O dilute solution, keep 15h under normal temperature, after impregnating, dry for subsequent use;

[0041] (3) Under continuous stirring and ultrasonic dispersion, the two salt solutions prepared in (1) were added dropwise to the above-mentioned modified Al at 80°C with the molar ratio of Rh:Zn being 0.38:1. 2 o 3 On the pellets, make the solution completely absorbed by the pellets, measure the Rh loading to account for 10wt% of the carrier, and keep it at 80°C for 3h;

[0042] (4) Dry the ...

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PUM

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Abstract

The invention discloses a catalyst and a preparation method thereof, in particular to a hydrogen production catalyst with high-temperature methyl alcohol water vapour and a preparation method thereof. The catalyst comprises active components of VIII group metal and auxiliary agent and also comprises modified Al2O3 spherules serving as a carrier, wherein, the sharing carrying capacity of the active components occupies 2.6-10wt% of the carrier, and the ratio of the active components to the auxiliary agent ZnO is 0.24-0.38:1. The catalyst has high reaction activity, high stability and simple manufacturing method, can lower cost and adopts the method of cocurrent flow dipping and ultrasonic dispersion, so that noble metal has small use amount and little waste, which can satisfy the requirement of the activity and service life of catalyst by industrialization. The catalyst of the invention can be applied in the fuel battery hydrogen supplying field on a large scale.

Description

technical field [0001] The invention relates to a high-temperature methanol steam reforming catalyst for hydrogen production. [0002] The present invention also relates to a method for preparing the above-mentioned catalyst. Background technique [0003] With the development of fuel cell research in recent years, the preparation of fuel, including hydrogen production, purification and storage, has also received extensive attention. In particular, with the successful development of microchannel reactors and the development of small fuel cells in recent years, fuel cells using hydrocarbons as raw materials have received more attention. Among these hydrocarbons, methanol, as a raw material for hydrogen production, has been widely used due to its advantages such as high hydrogen storage capacity, low sulfur content, and relatively low reforming temperature (250-350°C). Pay attention to. At the same time, methanol has a high energy density (5.6kWh / kg), and a very small amount...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/60C01B3/40
CPCY02P20/52
Inventor 肖钢王义周帅林
Owner HANERGY TECH
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