Deoxidation catalyst and preparation method thereof

A deoxidation catalyst and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of increasing the operating cost of purification equipment and reducing the resistance of the catalyst bed Large, dead volume of the catalyst bed and other problems, to achieve the effect of low production cost, small bed pressure loss, convenient use and replacement

Active Publication Date: 2014-08-27
HANGZHOU YIN LI ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The diameter of the catalyst particles is generally 3-5mm, and the space velocity is 5000h -1 , can make the oxygen content in the purified hydrogen lower than 5ppm, but this kind of catalyst is prone to "dead volume" in the catalyst bed during use, and the catalyst is easily swept by the air flow to suspension wear, which affects the deoxidation effect, and because The resistance drop of the catalyst bed is large, which increases the operating cost of the purification equipment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Take 1 liter of cordierite ceramic honeycomb carrier, its dimensions are 100×100×50mm, and the number of openings is 200 holes / in 2 , put the carrier in 0.1mol / L dilute hydrochloric acid solution, take it out after standing for 0.5h, wash it with deionized water until the pH is 7.0, and then dry it at 80°C and 120°C for 1h respectively, and cool the carrier for later use; weigh Al 2 o 3 , CrO 2 , ZrO 2 The powder mass (excess) is 150g, 6g, 6g respectively, pour into a glass beaker and mix evenly, inject deionized water while stirring until the mixture is gelatinous, then add dilute nitric acid to the solution, and stir until the pH value is 2 Between ~3, stand for 1 hour before use; immerse the pretreated cordierite in the above composite solution, take it out after about 10 seconds, blow off the remaining solution in the cordierite channel with compressed air, and then put the cordierite into the In an oven, dry at 80 °C and 120 °C for 1 h, then program the temperat...

Embodiment 2

[0021] With the same operation of embodiment 1, the difference is that every liter of catalyst loaded transition layer Al 2 o 3 , CrO 2 , ZrO 2 The contents of the metals are 60 grams, 5 grams, and 5 grams, respectively, and the precious metals Pt, Pd, and Rh are 0.1g, 1.2g, and 0.1g, respectively. The catalyst is at a space velocity of 8000h -1 , the oxygen content in hydrogen is 1%, and it is activated at a temperature of 80°C, and the oxygen content at the outlet is lower than 5ppm at 150°C.

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Abstract

The invention relates to a deoxidation catalyst and a preparation method thereof. Cordierite ceramic honeycomb is used as a carrier; a composite material of Al2O3, CeO2 and ZrO2 is used as a transition layer of the catalyst; and Pt, Pd and Rh are used as active ingredients of the catalyst. Every liter of the deoxidation catalyst comprises 0.05-0.2 g of Pt, 0.5-1.5 g of Pd, 0.05-0.2 g of Rh, 15-75 g of Al2O3, 3-15 g of CeO2 and 3-15 g of ZrO2. The preparation method comprises the steps of pre-treating the cordierite ceramic honeycomb carrier, then coating the composite material of Al2O3, CeO2 and ZrO2 as the transition layer of the catalyst by a dipping method; and then loading Pt, Pd and Rh as the active ingredients of the catalyst by a precipitation-adsorption method. The preparation method has the advantages of simple process and low production cost. The catalyst has stable performances and low bed pressure loss, and is convenient for use and replacement, so that the catalyst is particularly suitable for purification of hydrogen in a hydrogen production device by water electrolysis.

Description

technical field [0001] The invention relates to a deoxygenation catalyst and a preparation method thereof, which is particularly suitable for the purification of hydrogen in the water electrolysis hydrogen production industry, and belongs to the technical field of catalysts. Background technique [0002] With the development of the national economy, water electrolysis hydrogen production equipment has been widely used in electric power, electronics, metallurgy, chemical industry, aerospace, semiconductor, polysilicon and other industries. How to use economical and efficient purification methods to improve the purity of hydrogen has become more and more important. wider attention. [0003] The catalytic purification method is considered to be one of the most effective purification methods to remove the low concentration of oxygen in the hydrogen produced by the water electrolysis hydrogen production equipment. At present, in the industry, aluminum oxide is generally used as ...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): B01J23/63C01B3/58
Inventor朱雪姣
OwnerHANGZHOU YIN LI ENVIRONMENTAL PROTECTION TECH