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Perovskite type ceramic oxygen permeable membrane for partial oxidation reaction of methane

An oxidation reaction, perovskite-type technology, applied in membrane technology, oxygen preparation, semi-permeable membrane separation, etc., can solve the problems of poor structural stability of oxygen-permeable membrane materials, and achieve improved phase structure stability and good structural stability. sexual effect

Inactive Publication Date: 2008-10-08
UNIV OF SCI & TECH BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the BaCoO with higher oxygen permeability 3 Due to the disadvantage of poor structural stability of the base oxygen permeable membrane material, a certain amount of Fe element and Y element with strong stability are doped in its B site

Method used

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  • Perovskite type ceramic oxygen permeable membrane for partial oxidation reaction of methane
  • Perovskite type ceramic oxygen permeable membrane for partial oxidation reaction of methane
  • Perovskite type ceramic oxygen permeable membrane for partial oxidation reaction of methane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1: BaCo 0.7 Fe 0.20 Y 0.10 o 3-δ Synthesis by solid phase reaction

[0016] With 29.601g of BaCO 3 (analytically pure), 1.694g of Y 2 o 3 (analytical pure), 2.396g of Fe 2 o 3 (analytical pure), 26.154g of CoCH 3 COOH (analytical pure) is the raw material, that is, according to BaCo 0.7 Fe 0.20 Y 0.10 o 3-δ The mixture was prepared in the ratio of the elements, using alcohol as the medium, milled in an agate ball mill jar for 6 hours, mixed evenly, and dried in an oven. After the dried material was calcined at 1000°C for 10 hours, it was ground into powder with an agate mortar, and then ball milled with agate balls as the grinding medium for 4 hours, and then put into a drying oven for drying. After the drying is complete, grind it evenly in a mortar, add 1.0wt.% PVA to mix and dry it, and then dry press it in a steel casting mold. The pressed sample strip was heated to 1200°C in a high-temperature furnace, and after 10 hours of heat preservation, ...

Embodiment 2

[0017] Example 2: BaCo 0.7 Fe 0.22 Y 0.08 o 3-δ Synthesis by solid phase reaction

[0018] With 29.601g of BaCO 3 (analytical pure), 1.355g of Y 2 o 3 (analytical pure), 2.635g of Fe 2 o 3 (analytical pure), 26.154g of CoCH 3 COOH (analytical pure) is the raw material, that is, according to BaCo 0.7 Fe 0.22 Y 0.08 o 3-δ The mixture was prepared in the ratio of the elements, using alcohol as the medium, milled in an agate ball mill jar for 6 hours, mixed evenly, and dried in an oven. After the dried material was calcined at 1000°C for 10 hours, it was ground into powder with an agate mortar, and then ball milled with agate balls as the grinding medium for 4 hours, and then put into a drying oven for drying. After the drying is complete, grind it evenly in a mortar, add 1.0wt.% PVA to mix and dry it, and then dry press it in a steel casting mold. The pressed sample strip was heated to 1200°C in a high-temperature furnace, and after 10 hours of heat preservation, a ...

Embodiment 3

[0019] Example 3: BaCo 0.7 Fe 0.18 Y 0.12 o 3-δ solid phase reaction method

[0020] With 29.601g of BaCO 3 (analytically pure), 2.032g of Y 2 o 3 (analytical pure), 2.156g of Fe 2 o 3 (analytical pure), 26.154g of CoCH 3 COOH (analytical pure) is the raw material, that is, according to BaCo 0.7 Fe 0.18 Y 0.12 o 3-δ The mixture was prepared in the ratio of the elements, using alcohol as the medium, milled in an agate ball mill jar for 6 hours, mixed evenly, and dried in an oven. After the dried material was calcined at 1000°C for 10 hours, it was ground into powder with an agate mortar, and then ball milled with agate balls as the grinding medium for 4 hours, and then put into a drying oven for drying. After the drying is complete, grind it evenly in a mortar, add 1.0wt.% PVA to mix and dry it, and then dry press it in a steel casting mold. The pressed sample strip was heated to 1200°C in a high-temperature furnace, and after 10 hours of heat preservation, a dens...

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Abstract

The invention provides a perovskite type ceramic oxygen permeable membrane material used for the partial oxidation reaction of methane, which relates to an inorganic oxygen permeable membrane material and is characterized in that: a B site of BaCoO3 is doped with a certain amount of Fe elements and Y elements with strong stability for improving the structural stability, so the oxygen permeable membrane material of a BaCoO3 matrix also has the excellent structural stability while keeping rather high oxygen permeation flux, the molecular formula is: BaCo<0.7>Fe<0.3-x>Y<x>O<3-delta>, where x is between 0.06 and 0.30. The oxygen permeable membrane material produced by the invention is the oxygen permeable membrane material with compact structure, high oxygen permeation flux, good stability and outstanding performance, and can be applied to the continuous oxygen supply of the partial oxidation reaction of methane, as well as the industrial process of oxygen separation and purification in other oxygen containing gases.

Description

technical field [0001] The invention relates to an inorganic oxygen-permeable membrane material, in particular to a stable BaCoO doped with a small amount of Y element at the B site 3 Based perovskite ceramic oxygen permeable membrane material. Background technique [0002] The main chemical component of natural gas is methane, which is partially oxidized (POM, partial oxidation of methane) to produce synthesis gas (H 2 and CO) is one of the most important utilization forms of natural gas. Syngas is an important raw material for the production of liquid fuels (such as methanol) and other chemical products, and the research on the POM process has become a hot spot of widespread concern in the world. The membrane reactor with oxygen-permeable membrane material as the core component can separate pure oxygen from air or other oxygen-containing gases at high temperature, so that the separation of oxygen and the partial reaction of methane can be carried out simultaneously, avoi...

Claims

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Application Information

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IPC IPC(8): C04B35/32B01D71/02C01B13/02
Inventor 赵海雷程云飞李福燊徐南生
Owner UNIV OF SCI & TECH BEIJING
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