Cobalt-free anti-co 2 Poisoned high oxygen permeability biphasic oxygen permeable membrane material, preparation method and application thereof

A technology of oxygen permeable membrane and oxygen permeability, which is applied in the field of its preparation, ceramic oxygen permeable membrane, and mixed conductor oxygen permeable membrane, can solve the problems that cannot meet industrial applications, low oxygen permeability of two-phase oxygen permeable membrane, and achieve good Long-term stability, considerable oxygen permeability, and simple preparation method

Active Publication Date: 2022-08-05
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with the single-phase oxygen-permeable membrane, the main problem of the two-phase oxygen-permeable membrane is that the oxygen permeability is low, which cannot meet the industrial application (1mL / cm 2 / min) request

Method used

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  • Cobalt-free anti-co <sub>2</sub> Poisoned high oxygen permeability biphasic oxygen permeable membrane material, preparation method and application thereof
  • Cobalt-free anti-co <sub>2</sub> Poisoned high oxygen permeability biphasic oxygen permeable membrane material, preparation method and application thereof
  • Cobalt-free anti-co <sub>2</sub> Poisoned high oxygen permeability biphasic oxygen permeable membrane material, preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] In this embodiment, a cobalt-free anti-CO 2 The preparation method of the poisoned high oxygen permeability dual-phase oxygen permeable membrane material comprises the following steps:

[0039] a. Preparation of Sm 0.1 Sr 0.9 Cu 0.2 Fe 0.8 O 3-δ Powder material:

[0040] Preparation of Sm by Sol-Gel Method 0.1 Sr 0.9 Cu 0.2 Fe 0.8 O 3-δ Powder material, first weigh 1.74g of Sm 2 O 3 In a beaker, add a small amount of concentrated HNO with a mass fraction of 68% 3 , heated with electromagnetic stirring until completely dissolved, concentrated HNO 3 The amount of addition needs to be sufficient to convert Sm 2 O 3 Completely dissolved to give Sm(NO 3 ) 3 solution; weigh 19.11g of Sr(NO 3 ) 2 , 4.84g of Cu(NO 3 ) 2 ·3H 2 O and 32.43g Fe(NO 3 ) 3 ·9H 2 O in another large beaker, add deionized water, electromagnetic stirring to completely dissolve the Sr salt, Cu salt and Fe salt to obtain an intermediate solution, and then add the prepared Sm(NO) to...

Embodiment 2

[0055] This embodiment is basically the same as the first embodiment, and the special features are:

[0056] In this embodiment, a cobalt-free anti-CO 2 The preparation method of the poisoned high oxygen permeability dual-phase oxygen permeable membrane material comprises the following steps:

[0057] a. This step is the same as the first embodiment;

[0058] b. This step is the same as that of Embodiment 1;

[0059] c. Preparation of dual-phase oxygen permeable membrane material:

[0060] Weigh Sm with a mass ratio of 5:5 0.1 Sr 0.9 Cu 0.2 Fe 0.8 O 3-δ and Ce 0.8 Sm 0.2 O 2-δ The two powders were wet ball milled for 48h with alcohol as the dispersion medium to make the two phases fully mixed evenly. Pour it into the mold, and hold it under the pressure of 180-200MPa to form a green wafer;

[0061] Then, the temperature was raised to 1200 °C at a heating rate of 2 K / min, and calcined for 5 h to obtain dense Sm 0.1 Sr 0.9 Cu 0.2 Fe 0.8 O 3-δ -50% Ce 0.8 Sm 0....

Embodiment 3

[0065] This embodiment is basically the same as the previous embodiment, and the special features are:

[0066] In this embodiment, a cobalt-free anti-CO 2 The preparation method of the poisoned high oxygen permeability dual-phase oxygen permeable membrane material comprises the following steps:

[0067] a. This step is the same as the first embodiment;

[0068] b. This step is the same as that of Embodiment 1;

[0069] c. Preparation of dual-phase oxygen permeable membrane material:

[0070] Weigh Sm with a mass ratio of 4:6 0.1 Sr 0.9 Cu 0.2 Fe 0.8 O 3-δ and Ce 0.8 Sm 0.2 O 2-δ The two powders were wet ball milled for 48h with alcohol as the dispersion medium to make the two phases fully mixed evenly. Pour it into the mold, and hold it under the pressure of 180-200MPa to form a green wafer;

[0071] Then, the temperature was raised to 1200 °C at a heating rate of 2 K / min, and calcined for 5 h to obtain dense Sm 0.1 Sr 0.9 Cu 0.2 Fe 0.8 O 3-δ -60% Ce 0.8 Sm ...

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Abstract

The invention discloses a cobalt-free anti-CO 2 The poisoned high oxygen permeability double-phase oxygen-permeable membrane material, its preparation method and application belong to the technical field of functional ceramic preparation. The chemical formula of the dual-phase oxygen permeable membrane material is Sm x Sr 1‑x Cu y Fe 1‑y O 3‑δ ‑z wt% Ce 0.8 Sm 0.2 O 2‑δ , where 0≤x≤0.5, 0.1≤y≤0.3, 50≤z≤70. When preparing the biphasic film, the sol-gel method is used to prepare the two-phase material powders, which are mechanically mixed according to the mass ratio of the two phases in the chemical formula, and pressed under pressure to form a wafer green body. Heat preservation to obtain a dense two-phase oxygen-permeable membrane. The dual-phase oxygen-permeable membrane of the invention has compact structure, high mechanical strength, good compatibility between two phases, and no impurity-phase generation; 2 Excellent poisoning performance, able to contain CO 2 It can run stably for a long time in the atmosphere; it has a very considerable oxygen permeability, and the preparation method is simple and low in cost.

Description

technical field [0001] The invention relates to a ceramic oxygen-permeable membrane, its preparation method and application, in particular to a mixed conductor oxygen-permeable membrane, its preparation method and application, which are applied to the technical field of functional ceramic manufacturing. Background technique [0002] The mixed conductor oxygen permeable membrane is a dense ceramic membrane with 100% selective permeability to oxygen under high temperature and oxygen concentration gradient conditions. It is widely used in the preparation of pure oxygen, partial oxidation of methane to syngas, oxidative coupling of methane to produce hydrocarbons, and oxygen-enriched combustion, and has attracted extensive attention and research in recent decades. In its application, oxyfuel combustion is carbon dioxide capture, reducing CO 2 It is an effective solution for emissions, and has broad application prospects for energy saving and emission reduction in fossil fuel po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/02B01D69/02B01D67/00B01D53/22
CPCB01D71/024B01D69/02B01D67/0048B01D67/0041B01D67/0044B01D53/228B01D2256/12
Inventor 吴成章田强张鑫乐全威
Owner SHANGHAI UNIV
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