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Monolithic catalyst for preferentially oxidizing CO under hydrogen-rich condition, and preparation method thereof

A catalyst and integrated technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems affecting catalyst performance, etc., to avoid catalyst deactivation, Good catalytic performance and strong applicability

Pending Publication Date: 2020-02-21
左海珍
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Commonly used monolithic catalysts include straight-channel cordierite and multi-channel FeCr alloys. The catalysts with these structures have pores on the order of hundreds of microns, which can significantly reduce the pressure difference when the gas passes through the reactor. For example, Poberts et al. Loaded on a straight-channel ceramic monolithic carrier, the influence of space velocity and linear velocity on the catalyst activity was investigated, and it was found that the external diffusion was an important factor affecting the performance of the catalyst, and the reverse water gas shift reaction also seriously affected the conversion rate of CO and selectivity
Zhou et al. prepared Pt / Al supported by cordierite monolithic carrier 2 o 3 Catalyst, CuO / CeO prepared by Ayastuy et al. 2 Coated ceramic monolithic catalysts, when the loading of Cu was 7%, the monolithic catalysts showed better activity and selectivity, but CO 2 and H 2 The presence of O seriously affects the performance of the catalyst

Method used

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  • Monolithic catalyst for preferentially oxidizing CO under hydrogen-rich condition, and preparation method thereof
  • Monolithic catalyst for preferentially oxidizing CO under hydrogen-rich condition, and preparation method thereof
  • Monolithic catalyst for preferentially oxidizing CO under hydrogen-rich condition, and preparation method thereof

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preparation example Construction

[0041] Regarding the preparation method of porous metal, in the prior art, such as JPH07150270 A, a high-strength porous metal body is proposed, which is obtained by adding oxides, carbides, nitrogen and Coatings of reinforcement particles such as compounds, etc., are coated on the surface of the skeleton of a three-dimensional network resin having continuous pores, and a metal plating layer of Ni alloy or Cu alloy is further formed on the coating film of the coating, and then, heat-treated. Particles are obtained by dispersing the metal coating. WO2013099532 proposes a method for producing a porous body in which, when conducting a conductive treatment on the surface of a resin forming body having a three-dimensional network structure, carbon paint is mixed with metal powder for coating, and then the desired metal is plated , heat-treated to obtain a homogeneous alloy porous body. US2018030607 discloses a method for manufacturing a nickel alloy porous body, including: coating...

Embodiment 1

[0044] The catalyst preparation process is as follows:

[0045] (a) Preparing polystyrene (1) macroporous polymer foam, the pore diameter of the polystyrene channel 2 is 20-40 μm. ;

[0046] (b) Configure an aqueous solution of metal active components, the active component is chloroplatinic acid-nitrosyl ruthenium nitrate-graphene aqueous solution 3, wherein the molar ratio Pt:Ru=1:(1~1.5), the active component 2 ~9wt.%, the content of graphene is 10~30%;

[0047] (c) Use a vacuum pump to carry out vacuum filling until no bubbles emerge on the surface of the polymer foam immersed in the aqueous solution of the metal active component, then dry in an oven, repeat filling and drying, and the number of repetitions is 4 times, and the active component Pt- Ru-graphene is filled to the surface of polystyrene polymer foam channels;

[0048] (d) With the polymer foam filled in the step (c) as the negative electrode, immersed in the nickel electroplating solution 4, carry out electro...

Embodiment 2

[0052] The catalyst preparation process is as follows:

[0053] (a) Preparing polystyrene (1) macroporous polymer foam, the pore diameter of the polystyrene channel 2 is 20-40 μm. ;

[0054] (b) Configure an aqueous solution of metal active components, the active component being chloroplatinic acid-nitrosyl ruthenium nitrate-graphene aqueous solution 3, wherein the molar ratio Pt:Ru=1:1.25, active component 5wt.%, graphite The content of alkenes is 20%;

[0055] (c) Use a vacuum pump to carry out vacuum filling until no bubbles emerge on the surface of the polymer foam immersed in the aqueous solution of the metal active component, then dry in an oven, repeat filling and drying, and the number of repetitions is 4 times, and the active component Pt- Ru-graphene is filled to the surface of polystyrene polymer foam channels;

[0056] (d) With the polymer foam filled in the step (c) as the negative electrode, immersed in the nickel electroplating solution 4, carry out electroch...

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Abstract

The invention provides a monolithic catalyst for preferentially oxidizing CO under a hydrogen-rich condition, and a preparation method thereof. According to the invention, the catalyst is high in mechanical strength, effectively reduces the size of a reactor for preferentially oxidizing carbon monoxide in hydrogen-rich gas, is good in heat conductivity, can effectively avoid the problem of hot spots, and is particularly suitable for small-sized on-site hydrogen supply devices.

Description

technical field [0001] The invention relates to a method for preparing monolithic catalysts through electrochemical deposition, and belongs to the field of electrochemical preparation of catalysts. The catalysis particularly relates to the preferential oxidation of CO under hydrogen-rich conditions. [0002] technical background [0003] As an efficient, clean and renewable secondary energy source, hydrogen energy has been applied in various fields of social life, and the demand for hydrogen energy has been increasing in recent years. At present, the main hydrogen production technology fields include fossil fuel hydrogen production (methanol, ethanol, natural gas), biological hydrogen production, electrolytic water hydrogen production, etc. The main way of fuel cell hydrogen production technology is through reforming or partial oxidation of hydrocarbons (methanol, ethanol, natural gas, etc.), and then through the water gas shift reaction. The resulting reformed gas contains ...

Claims

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Application Information

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IPC IPC(8): B01J23/89B01J35/02B01D53/86B01D53/62
CPCB01J23/892B01D53/62B01D53/864B01J35/33B01J35/00B01J35/30Y02A50/20
Inventor 左海珍
Owner 左海珍
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