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Difunctional ceramic membrane for gas in-situ dry reforming and preparation method thereof

A dual-function, ceramic membrane technology, applied in the field of electrochemistry, can solve problems such as high energy consumption, achieve the effects of improving conversion efficiency, reducing cost and energy consumption, and preventing escape

Pending Publication Date: 2022-04-29
SHENZHEN UNIV
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Problems solved by technology

[0004] In view of the above deficiencies in the prior art, the purpose of the present invention is to provide a dual-function ceramic membrane for in-situ dry reforming of gas and its preparation method, aiming to solve the problems in the process of gas transportation when the prior art treats industrial waste gas. The problem of huge energy consumption realizes the in-situ conversion of industrial waste gas

Method used

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  • Difunctional ceramic membrane for gas in-situ dry reforming and preparation method thereof
  • Difunctional ceramic membrane for gas in-situ dry reforming and preparation method thereof

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Embodiment 1

[0057] In situ dry reforming of carbon dioxide gas

[0058] 1. Preparation of bifunctional ceramic membrane

[0059] (1) Dissolve the nitrate precursor of the perovskite oxide containing La, Sr, Fe, Ni ions in water, then add citric acid and EDTA to the solution, and adjust the pH value to 7-8 with ammonia water, then stir until the solution turns into a sol-gel state, and dry at 160-200°C for 4-6 hours to obtain a black precursor;

[0060] (2) Calcining the obtained black precursor in the air at 900-1000°C for 3.5-4.5 hours to obtain the catalyst La 0.7 Sr 0.3 Fe 0.8 Ni 0.2 o 3-δ (LSFN) powder;

[0061] (3) Mix LSFN powder and SDC at a ratio of 3:7, press the mixed LSFN-SDC powder, and calcinate at a high temperature of 1100°C to obtain a bifunctional ceramic membrane substrate;

[0062] (4) Spread a layer of alkali metal carbonate on the substrate (according to the volume ratio of lithium carbonate and potassium carbonate 1:1), keep it at 550°C for 2 hours, and wait f...

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Abstract

The invention provides a bifunctional ceramic membrane for gas in-situ dry reforming and a preparation method thereof, the bifunctional ceramic membrane takes a compound of an oxygen ion conductor electrolyte and a catalyst as a matrix, and alkali carbonate is immersed in the matrix. The oxygen ion conductor electrolyte can permeate and trap gas, and the catalyst catalyzes the permeated and trapped gas for in-situ conversion. According to the invention, an in-situ dry reforming technology is adopted, and the industrial waste gas generated in the industrial production process permeates through the difunctional ceramic membrane through the difunctional ceramic membrane and is subjected to dry reforming under the action of the catalyst, so that the industrial waste gas is converted into the synthesis gas with high additional value through dry reforming. The bifunctional ceramic membrane integrates two functions of permeation and dry reforming, in-situ dry reforming of gas is truly realized, the complexity of a gas treatment device is reduced, the cost and energy consumption for gas trapping and conversion are reduced, escape of gas to be treated is effectively prevented, and the conversion efficiency is improved.

Description

technical field [0001] The invention relates to the field of electrochemical technology, in particular to a dual-function ceramic membrane for in-situ dry reforming of gas and a preparation method thereof. Background technique [0002] Industrial production often produces a large amount of waste gas, such as a large amount of greenhouse gas carbon dioxide produced by coal fuel power generation, nitrogen oxides (NOx), one of the main atmospheric pollutants produced by metal smelters, and so on. If these exhaust gases are not effectively treated, they will be directly discharged into the atmosphere, which will seriously endanger the ecological environment and human health. In the prior art, the waste gas is usually collected before further treatment. However, this also means that the gas processing device is more complicated, and a huge amount of material transportation energy consumption and heat loss are required in the gas transportation process. Therefore, how to realize...

Claims

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Application Information

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IPC IPC(8): B01J27/232B01J35/06C01B3/02C01B32/40
CPCB01J27/232C01B3/02C01B32/40C01B2203/0238C01B2203/1041B01J35/59
Inventor 翟朔谢和平陈彬刘涛
Owner SHENZHEN UNIV
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