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Preparation method of single-walled carbon nanotube-metal hybrid AlPO4-5 molecular sieve composite membrane

A technology of single-walled carbon nanotubes and molecular sieve membranes, applied in chemical instruments and methods, membranes, membrane technologies, etc., can solve the problems of low SWCNTs content, long time consumption, high energy consumption, etc., to avoid thermodynamic deformation, increase filling capacity, highly reproducible effect

Active Publication Date: 2019-12-17
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has been reported that using SAPO 4 Single-walled carbon nanotubes (SWCNTs) were prepared from organic carbon sources in -5 molecular sieve channels, and SWCNTs were combined with SAPO 4 The characteristics and advantages of -5 molecular sieve are organically combined, and the hydrocracking method is used in the preparation process, but the heating process of this process adopts the traditional heating method, which not only takes a long time and consumes a lot of energy, but also the prepared The content of SWCNTs in the sample is relatively low

Method used

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  • Preparation method of single-walled carbon nanotube-metal hybrid AlPO4-5 molecular sieve composite membrane
  • Preparation method of single-walled carbon nanotube-metal hybrid AlPO4-5 molecular sieve composite membrane
  • Preparation method of single-walled carbon nanotube-metal hybrid AlPO4-5 molecular sieve composite membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Preparation of FeAlPO on a porous ceramic support 4 -5 molecular sieve membrane

[0033] According to 1Al 2 o 3 :1.3P 2 o 5 :1TPABr:1000H 2 O:0.3FeCl 3 (mol) ratio of materials to prepare synthetic liquid. Using aluminum isopropoxide as the source of aluminum, in order to fully dissolve it, aluminum isopropoxide is added to phosphoric acid aqueous solution, and stirred and dissolved in an oil bath at 60°C for about 5 hours. The dissolved aluminum isopropoxide aqueous solution is basically transparent liquid. Then FeCl was mixed under stirring 3 Add to the phosphoric acid aqueous solution dissolved in aluminum isopropoxide, and continue to stir until it is completely dissolved. Under stirring state, TPABr was added dropwise into the mixed liquid, and stirred for two hours to completely dissolve each substance, and the pH of the synthetic liquid was adjusted to 6, and then aged at room temperature for 10 hours. Put 20ml of synthesis solution and the sheet-sh...

Embodiment 2

[0039] (1)NiAlPO 4 Preparation of -5 molecular sieve membrane

[0040] Basically the same as Example 1, the difference is that aluminum sulfate is used as the aluminum source, according to 1Al 2 o 3 :0.8P 2 o 5 :0.15TPAOH:45H 2 O:0.075Ni(NO 3 ) 2 (mol) ratio of materials to prepare synthetic liquid. The fully dissolved aluminum sulfate aqueous solution is basically a transparent liquid. Then, the phosphoric acid solution dissolved with a certain amount of nickel nitrate was added dropwise into the aluminum sulfate aqueous solution, and stirred at room temperature until uniform. Under the condition of stirring, TPAOH was gradually added dropwise to the mixed liquid in sequence, and the stirring was continued for 2 hours. After the substances were completely dissolved, the pH of the reaction liquid was adjusted to about 2. The reaction solution was aged at room temperature for 20 hours before being added to the reactor. Then, 30ml of the synthetic solution and the shee...

Embodiment 3

[0047] (1) Preparation of CoAlPO-5 molecular sieve membrane on porous alumina support

[0048] It is basically the same as Example 1, except that sodium aluminate is used as the aluminum source respectively, according to 1Al 2 o 3 :1.3P 2 o 5 :0.5TPABr:200H 2 O:0.15Co(NO 3 ) 3 (mol) ratio of materials to prepare synthetic liquid. The reaction temperature was 180°C, and the reaction time was 100 hours.

[0049] (2) Detection of integrity of CoAlPO-5 molecular sieve membrane

[0050] Concrete operation steps are identical with embodiment 1

[0051] The CoAlPO-5 molecular sieve membrane obtained after two synthesis reactions, its N 2 The air permeability is generally less than 5×10 －11 mole m －2 ·Pa －1 ; It shows that the synthesized tubular CoAlPO-5 molecular sieve membrane has almost no intergranular defects.

[0052] (3) Preparation of single-wall carbon nanotube-CoAlPO-5 molecular sieve composite membrane

[0053] It is basically the same as Example 1, except th...

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Abstract

The invention discloses a preparation method of a single-walled carbon nanotube-metal hybrid AlPO4-5 molecular sieve composite membrane. Single-walled carbon nanotubes (SWCNTs) are prepared in pores of an AlPO4-5 molecular sieve membrane by utilizing a positive streamer discharge technology, so the time, the reaction temperature and the energy consumption in the preparation process are greatly reduced, and the content of the SWCNTs in membrane pores, the completeness of the composite molecular sieve membrane and the membrane forming efficiency are effectively improved.

Description

Technical field: [0001] The invention relates to the technical field of inorganic membrane materials and membrane separation, in particular to a single-walled carbon nanotube-metal hybrid AlPO 4 -5 Preparation method of molecular sieve composite membrane. Background technique: [0002] Molecular sieve membranes can achieve molecular sieving or shape-selective diffusion based on the molecular size, shape and polarity of the separated substance, relying on the regular pore structure of the molecular sieve, so as to achieve efficient separation of gas or liquid mixtures. Molecular sieve itself has a certain catalytic activity. If other catalytically active components are introduced into the molecular sieve membrane to prepare a zeolite molecular sieve membrane reactor, the reaction process and separation process can be easily coupled together, so that it has both The dual functions of separation and catalysis realize the integration of reaction and separation, which not only i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D69/12B01D69/02B01D67/00
CPCB01D71/028B01D71/021B01D71/022B01D69/12B01D69/02B01D67/0039B01D2323/24B01D2323/35
Inventor 杨文申谢建军阴秀丽吴创之
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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