Oxygen adsorbent for oxygen enrichment
An oxygen adsorbent and oxygen technology, applied in gas treatment, membrane technology, other chemical processes, etc., can solve problems such as structural instability, achieve the effects of increasing concentration, increasing electrical conductivity, and improving oxygen adsorption performance
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0019] The invention also discloses a preparation method of the oxygen adsorbent, comprising the following steps:
[0020] Taking carbonates or oxides of various metal elements in ethanol according to the ratio shown in the chemical formula, ball milling, drying, tableting, and roasting, the product is subjected to a second ball milling treatment, and powder is obtained after drying.
[0021] In the above preparation method, as a specific embodiment, the carbonate or oxide of each metal element is BaCO 3 , SrCO 3 , Fe 2 o 3 、Al 2 o 3 and TiO 2 . The time for the first ball milling is 5-10 hours, the time for the second ball milling is 4-8 hours, preferably 4-6 hours; the temperature of calcination is 900-1200°C, preferably 1000-1100°C, and the calcination time is 10-15h .
[0022] The technical purpose of another aspect of the present invention is to provide the application of the oxygen adsorbent in oxygen separation. After the oxygen adsorbent powder is pressed into ...
Embodiment 1
[0026] Oxygen adsorbent Ba 0.15 Sr 0.85 Al 0.15 Fe 0.85 o 3-δ Preparation of:
[0027] Take the raw material BaCO according to the molar ratio of 3:17:1.5:8.5 3 , SrCO 3 、Al 2 o 3 and Fe 2 o 3 Mix, add ethanol to submerge the powder material, ball mill for 10 hours, take the powder and press it into tablets after drying, put it into a muffle furnace and roast at 1050°C for 10 hours to obtain perovskite oxide powder with larger particles; After adding ethanol, the powder was milled twice for 5 hours to refine the particles, and then dried to obtain BSAF powder.
Embodiment 2
[0029] Oxygen adsorbent Ba 0.15 Sr 0.85 Ti 0.15 Fe 0.85 o 3-δ Preparation of:
[0030] Take the raw material BaCO according to the molar ratio of 3:17:3:8.5 3 , SrCO 3 、TiO 2 and Fe 2 o 3 Mix, add ethanol to submerge the powder material, ball mill for 10 hours, take the powder and press it into tablets after drying, put it into a muffle furnace and roast at 1050°C for 10 hours to obtain perovskite oxide powder with larger particles; After adding ethanol to the body, the second ball milling was performed for 5 hours to refine the particles, and the BSTF powder was obtained by drying.
[0031] The BSAF powder and BSTF powder obtained in Example 1 and Example 2 were respectively subjected to in-situ high-temperature HT-XRD testing, and the results were as follows: figure 1 and figure 2 It can be seen from the figure that only the characteristic diffraction peaks of the perovskite structure appear in the process of heating the oxide powder from room temperature to 1000...
PUM
| Property | Measurement | Unit |
|---|---|---|
| Diameter | aaaaa | aaaaa |
| Thickness | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More