Catalyst for purifying CO in hydrogen-rich gas as well as preparation method and application of catalyst

A technology for purifying catalysts and enriching hydrogen, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of insufficient CO purification depth and water resistance, Achieve the effect of simple and rapid modification process, increase upload capacity, and increase CO removal depth

Active Publication Date: 2022-02-15
SHANGHAI RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Despite substantial progress in catalyst activity and selectivity, the CuO-CeO 2 The temperature at which the base catalyst achieves high activity is still high (>130°C), and the depth of CO purification and water resistance are not enough

Method used

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  • Catalyst for purifying CO in hydrogen-rich gas as well as preparation method and application of catalyst
  • Catalyst for purifying CO in hydrogen-rich gas as well as preparation method and application of catalyst
  • Catalyst for purifying CO in hydrogen-rich gas as well as preparation method and application of catalyst

Examples

Experimental program
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Effect test

preparation example Construction

[0042] The invention provides a method for preparing a CO purification catalyst in hydrogen-rich gas, comprising the following steps:

[0043] (1) Carry out pretreatment to the boring base material;

[0044] (2) prepare copper salt precursor, cerium salt precursor, metal M salt precursor and sepiolite powder to be mixed into slurry, the preparation volume total amount of described slurry is the saturation of the slurry by the pretreated pore-opening substrate The total amount of adsorption;

[0045] (3) using the slurry to infiltrate the pretreated hole-boring substrate to obtain a hole-boring substrate soaked with the slurry;

[0046] (4) Drying the hole-expanding substrate soaked with the slurry, and then roasting to obtain a catalyst for purifying CO in hydrogen-rich gas.

[0047] In some possible embodiments of the present invention, the hole-expanding substrate is selected from one of natural cotton or loofah whose main components are C, H, and O, and the volume porosity ...

Embodiment 1

[0057] Select natural cotton with a volume porosity of 65% as the hole-expanding substrate, cut the hole-expanding substrate with a weight of 1 g, wash it once with deionized water, then wash it twice with absolute ethanol, and then move it to a vacuum drying oven at 100°C Dry 8h. Take out the boring base material, place it in a coaxial tubular dielectric barrier reactor, and carry out discharge modification under the protection of 150mL / min argon (Ar), and pause for 2 minutes every 2 minutes of discharge modification, and control the discharge power at 15KW. The total time is 8 minutes.

[0058] Weigh 0.906g copper nitrate trihydrate, 13.026g cerium nitrate hexahydrate, 0.2844g stannous chloride, 1g sepiolite powder (D50=9μm) and 40mL of deionized water and 5mL of absolute ethanol are mixed to prepare a slurry, Place the container containing the slurry in an ultrasonic cleaner for continuous ultrasonication.

[0059] Spread the hole-boring base material after the above pret...

Embodiment 2

[0082] The slurry was prepared by mixing 0.906g copper nitrate trihydrate, 13.026g cerium nitrate hexahydrate, 0.2844g stannous chloride, 0.5g sepiolite powder (D50=9μm), 40mL deionized water and 5mL absolute ethanol , the remaining steps are the same as in Example 1, and the catalyst obtained is marked as CCS-SEP-mb-2. During the wetting process, the contact angle θ of the test slurry on the surface of the boring substrate was <20°.

[0083] SEM results showed that the above catalyst had a similar microscopic morphology to the sample in Example 1. The specific surface area of ​​the sample measured by BET analysis is 75.6m 2 / g.

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Abstract

The invention relates to a catalyst for purifying CO in hydrogen-rich gas as well as a preparation method and application of the catalyst. The preparation method of the catalyst comprises the following steps: pretreating a pore-expanding base material; preparing a copper salt precursor, a cerium salt precursor, a metal M salt precursor with tetravalence and sepiolite powder to prepare slurry; infiltrating the pretreated pore-expanding base material by using the slurry; and drying the pore-expanding base material infiltrated with the slurry, and then roasting to obtain the CO purification catalyst in the hydrogen-rich gas. Compared with the prior art, in the preparation process of the catalyst, the pore-expanding base material participates, the preparation raw materials are low in price and easy to obtain, and the catalyst has mesh-shaped morphology, multi-level pore channels, high CO trapping capacity, low selective oxidation reaction temperature of CO in hydrogen-rich gas, high removal depth and relatively high moisture resistance.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a catalyst for purifying CO in hydrogen-rich gas and its preparation method and application. Background technique [0002] Fuel cell vehicles are the main demand field for hydrogen energy. The fuel source is mainly through the reforming / partial oxidation of hydrocarbons. The hydrogen-rich gas produced by this method will contain 0.5-1vol.% CO impurities, and a small amount of CO is easily adsorbed on The surface of the Pt catalyst on the anode of the battery will cause electrode poisoning and seriously reduce the performance and service life of the battery. Preferential oxidation is the most economical and effective way to remove CO from hydrogen-rich gas, and the key lies in the development of low-temperature and high-efficiency catalysts. [0003] Such catalysts studied at home and abroad mainly include noble metal and non-noble metal catalysts. Noble metals are gradually re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B01J23/835B01J35/10B01D53/86B01D53/62
CPCB01J23/835B01J23/83B01J23/002B01J35/1014B01J35/1061B01D53/864B01J2523/00B01D2257/502B01D2258/0208B01J2523/17B01J2523/3712B01J2523/43B01J2523/48Y02A50/20
Inventor 夏克叶丽萍黄金花杨丙星赵诚罗勇
Owner SHANGHAI RES INST OF CHEM IND
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