Unlock instant, AI-driven research and patent intelligence for your innovation.

Anion-doped K2NiF4 type mixed-conducting oxygen-permeable membrane material and preparation and application method thereof

A mixed conductor, aani1-bbbo4 technology, which is applied in the field of anion-doped K2NiF4 mixed conductor oxygen-permeable membrane material and its preparation, can solve problems such as unsatisfactory oxygen-permeable performance, and achieve improved oxygen ion mobility and high operational stability Sex, the effect of increasing oxygen permeability

Active Publication Date: 2017-07-21
上海联风气体有限公司 +1
View PDF1 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the oxygen permeability of materials doped with oxygen ions still cannot meet the needs of practical applications.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Anion-doped K2NiF4 type mixed-conducting oxygen-permeable membrane material and preparation and application method thereof
  • Anion-doped K2NiF4 type mixed-conducting oxygen-permeable membrane material and preparation and application method thereof
  • Anion-doped K2NiF4 type mixed-conducting oxygen-permeable membrane material and preparation and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A kind of chlorine ion-doped K of the present embodiment 2 NiF 4 Type mixed conductor oxygen permeable membrane material Pr 2 Ni 0.7 Cu 0.3 o 3.875+δ Cl 0.25 (PNCCl 0.25 ) and the mixed conductor oxygen-permeable membrane material Pr not doped with chloride ions 2 Ni 0.7 Cu 0.3 o 4+δ (PNC) preparation method, wherein δ=0~1, specifically comprises the following steps:

[0035] (1) Preparation of PNCCl 0.25 Metal salt solution: first 32.98g Pr 2 o 3 be dissolved in 30ml of nitric acid with a mass fraction concentration of 65%, and then mix the obtained solution with 125ml of 0.1mol / L NiCl 2 Aqueous solution, 115ml 0.5mol / L Ni(CH 3 COO) 2 Aqueous solution, 100ml 0.3mol / L Cu(NO 3 ) 2 The aqueous solution is mixed to obtain a mixed metal salt solution.

[0036] (2) Prepare the metal salt solution of PNC: first mix 32.98g Pr 2 o 3 Dissolve in 30ml mass fraction concentration and be in the nitric acid of 65%, then the solution that obtains is mixed with 140...

Embodiment 2

[0042] A kind of anion-doped K of the present embodiment 2 NiF 4 Type Mixed Conductor Oxygen Permeable Membrane Material Nd 1.9 NiO 3.75+δ Cl 0.5 (NNCl 0.5 ) preparation method, wherein δ=0~1, specifically comprises the following steps:

[0043] (1) Measure 57ml 5mol / L Nd(NO 3 ) 3 Aqueous solution and 22.5ml 5mol / L Ni(CH 3 COO) 2 Aqueous solution, 25ml1.5mol / L NiCl 2 The aqueous solutions are mixed to obtain a mixed metal salt solution.

[0044] (2) Add EDTA and citric acid to the mixed metal salt solution according to the molar ratio of total metal ions: EDTA: citric acid = 2:1.5:2, then stir continuously, drop ammonia water with a mass fraction concentration of 20%, and adjust the mixing The pH value of the solution was 7, and a clear solution was obtained; continue heating and stirring at a temperature of 90° C., and keep the constant temperature for 40 hours to form a gel.

[0045] (3) Transfer the obtained gel to an evaporating dish, place it on a resistance wi...

Embodiment 3

[0049] K in this example 2 NiF 4 Type mixed conductor oxygen permeable membrane material La 1.8 Ni 0.85 Cu 0.15 o 4+δ (LNC) preparation method, wherein δ=0~1, specifically comprises the following steps:

[0050] (1) Measure 36ml 5mol / L La (NO 3 ) 3 Aqueous solution, 42.5ml 2mol / L Ni(CH 3 COO) 2 Aqueous solution and 50ml 0.3mol / L Cu(NO 3 ) 2 The aqueous solutions are mixed to obtain a mixed metal salt solution.

[0051] (2) Add EDTA and citric acid to the mixed metal salt solution according to the molar ratio of total metal ions: EDTA: citric acid = 2:3:1, then stir continuously, drop ammonia water with a mass fraction concentration of 20%, and adjust the mixing The pH value of the solution was 8, and a clear solution was obtained; continue heating and stirring at a temperature of 150° C., and keep the constant temperature for 30 hours to form a gel.

[0052](3) Transfer the obtained gel to an evaporating dish, place it on a resistance wire furnace and heat it to 45...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an anion-doped K2NiF4 type mixed-conducting oxygen-permeable membrane material and a preparation and application method thereof. The general chemical formula of the anion-doped K2NiF4 type mixed-conducting oxygen-permeable membrane material is AaNi1-bBbO4+delta-c / 2Xc, wherein A is one or two of La, Pr, Nd, Sm, Gd and Er, B is one or two of Fe, Co, Cu, Zn, Al and Ga, X is one of F, Cl, Br and I, delta is a non-stoichiometric ratio, 1.8<=a<=2, 0<=b<=0.3, and 0<=c<=0.5. The anion-doped K2NiF4 type mixed-conducting oxygen-permeable membrane material is prepared through EDTA-citrate (ethylene diamine tetraacetic acid-citrate) mixed complexometry; doping of anions can reduces the valence electron density of O and greatly improves the oxygen permeation of the membrane material; meanwhile, the anion-doped K2NiF4 type mixed-conducting oxygen-permeable membrane material can obtain high operation stability in acidic atmosphere containing carbon dioxide and the like, selectively separate oxygen from air, and can be coupled with oxygen-involved reaction to structure a membrane reactor.

Description

technical field [0001] The invention belongs to the field of mixed conductor film materials, in particular to anion-doped K 2 NiF 4 Type mixed conductor oxygen permeable membrane material and its preparation method and application. Background technique [0002] Oxygen ion-electron mixed conductor is a new type of ceramic membrane material with both oxygen ion conductivity and electron conductivity. This kind of material not only has catalytic activity, but also can selectively permeate oxygen at medium and high temperatures. The form of ionic oxygen is conducted through oxygen holes. Theoretically, the diffusion selectivity of oxygen is 100%. The high-temperature separation device using the mixed conductor oxygen-permeable membrane can realize the direct separation of air and obtain extremely high-purity oxygen. This high-temperature The pure oxygen separation device has a simple structure. Compared with the traditional air separation technology, the device investment can ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C04B35/50C04B35/622B01D53/22B01D67/00B01D71/02
CPCB01D53/228B01D67/0044B01D71/024B01D2257/104C04B35/50C04B35/622C04B2235/3224C04B2235/3227C04B2235/3279C04B2235/3281C04B2235/444C04B2235/602C04B2235/656C04B2235/6562C04B2235/6565C04B2235/6567C04B2235/9692
Inventor 王海辉陈莉薛健
Owner 上海联风气体有限公司