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Method for preparing tubular support dense oxide film

A dense oxide, tubular support technology, applied in the field of selective separation, can solve the problem that the mechanical strength cannot meet the requirements of industrialization, and achieve the effect of good mechanical performance and dense film surface

Active Publication Date: 2010-06-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Patent CN1360967 discloses a preparation method of an ultra-thin self-supporting mixed conductor oxygen-permeable membrane. A flat membrane with a thickness of tens of microns containing different types and different amounts of organic pore-forming agents is made by using a flat casting method. Good stability and high oxygen permeability, but its mechanical strength cannot meet the requirements of industrialization

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  • Method for preparing tubular support dense oxide film
  • Method for preparing tubular support dense oxide film
  • Method for preparing tubular support dense oxide film

Examples

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Effect test

Embodiment 1

[0023] The support tube is a ceramic tube composed of oxygen, silicon, aluminum, sodium, calcium, magnesium, potassium, titanium, iron and trace amounts of strontium, zirconium, and rubidium. It contains a through hole with a diameter of 50 μm, an inner diameter of 10 mm, and an outer diameter of 15 mm. . First, the support tube is cleaned in ethanol and placed in a muffle furnace. The temperature of the muffle furnace is raised to 1100°C at a rate of 5°C / min, kept for 2 hours, and naturally cooled to room temperature. The dense oxide component is prepared by the sol method. It is a doped perovskite structure material. The specific method is to accurately weigh the nitrates of strontium, titanium, iron and copper, and add urea and ethylene glycol according to the ratio of total metal ion number: urea: ethylene glycol molar ratio of 1: 2: 3, with urea as Complexing agent, ethylene glycol as a dispersant, using ammonia water to adjust the pH of the sol to 6.5, raising the tempe...

Embodiment 2

[0025] The support tube is a ceramic tube containing oxygen, silicon, aluminum, sodium, calcium, magnesium, potassium, titanium, iron and trace amounts of strontium, zirconium, and rubidium. The tube wall has a through hole with a diameter of 5 μm, and the inner diameter of the ceramic tube is 15 mm. The outer diameter is 20mm. First, the support tube is cleaned in ethanol and placed in a muffle furnace. The temperature of the muffle furnace is raised to 1100°C at a rate of 2.5°C / min, kept for 1h, and naturally cooled to room temperature. The dense oxide is a doped perovskite structure prepared by a sol-gel method. Accurately weigh the nitrates of strontium, titanium, iron and manganese, add citric acid and ethylene glycol according to the molar ratio of the total number of metal ions: citric acid: ethylene glycol in a ratio of 1:3:3, and the complexation of the sol Citric acid was used as the agent, ethylene glycol was used as the dispersant, the pH of the solution was adjust...

Embodiment 3

[0027]A ceramic tube containing oxygen, silicon, aluminum, calcium, magnesium, potassium, titanium, vanadium, iron and trace amounts of strontium, zirconium, and rubidium is used as a support tube. The tube wall has a through hole with a diameter of 10 μm, and the inner diameter of the support tube is 12 mm. , with an outer diameter of 18 mm. First, the support tube was cleaned in ethanol and placed in a muffle furnace. The temperature of the muffle furnace was raised to 1000 °C at a rate of 5 °C / min, kept for 2 hours, and then naturally cooled to room temperature. The dense oxide is a doped perovskite structure prepared by a sol-gel method. Accurately weigh the nitrates of zirconium, titanium, iron and copper, add urea and ethylene glycol according to the molar ratio of the total number of metal ions: urea: ethylene glycol is 1:3:4, and adjust the pH of the sol with ammonia water =8, heat to 80°C, stir for 6 hours to form a gel, let it stand still, immerse the support tube in...

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Abstract

The invention relates to a method for preparing a tubular support dense oxide film, which comprises the following steps of: (1) selecting a ceramic tubular material with good air permeability and mechanical performance as a support body; (2) preparing mixed ion conductor composite oxide sol formed by a sol-gel method according to demands, soaking the support body into the sol in a film plating way by a pulling method; and drying by an automatic pulling film plating machine and then controlling the sintering temperature procedure to prepare the tubular support dense oxide film. The oxide film has dense surface, high oxygen penetration rate and good mechanical performance. The method for leading oxygen to selectively penetrate an oxygen penetration film is a promising gas separating method; and the method has the main principle that the oxygen selectively penetrates \a mixed ion conductor material, wherein the oxygen enters reaction in an ion way, and the method can control the reaction speed, reduce the pollution to the environment and is an environmental protection type process. A tubular film reactor has wide application prospect because of having the advantages of adjustable scale, simple and convenient operation, and the like.

Description

technical field [0001] The invention relates to the field of membrane technology and to the selective separation of gas in the membrane, in particular to the separation of oxygen from oxygen-containing gas, especially air, for use in the oxidation reaction process in petrochemical industry. technical background [0002] Selective permeation of oxygen using an oxygen permeable membrane is a promising gas separation method. The main principle of this method is to selectively permeate oxygen by mixing ion conductor materials, in which oxygen enters the reaction in the form of ions, so The speed of the reaction can be controlled to avoid excessive energy consumption during the reaction. At the same time, it can avoid the generation of nitrogen oxides in the reaction and reduce the pollution to the environment, which is an environmentally friendly process. [0003] At the same time, membrane reactors, especially tubular membrane reactors, have wide application prospects due to t...

Claims

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Application Information

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IPC IPC(8): B01D71/02B01D67/00
Inventor 武洁花张明森柯丽冯静张飞
Owner CHINA PETROLEUM & CHEM CORP
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