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Tubular supporting carbon molecular sieve membrance and its preparing method

A technology of carbon molecular sieve and tubular support, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc.

Inactive Publication Date: 2005-12-21
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there has not been any report on the addition of nano-inorganic materials to tubular supported carbon membranes.

Method used

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  • Tubular supporting carbon molecular sieve membrance and its preparing method
  • Tubular supporting carbon molecular sieve membrance and its preparing method
  • Tubular supporting carbon molecular sieve membrance and its preparing method

Examples

Experimental program
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Effect test

Embodiment 1

[0035] After washing / drying the alumina ceramic tube with a pore size of 0.2 μm, the prepared stable aluminum sol film was coated by dipping method for 4 seconds, dried at room temperature for 24 hours, and dried in vacuum for 6 hours. Raise the temperature to 600°C at a rate of 1°C / min, keep it warm for 3 hours, and lower the room temperature naturally. The above steps are repeated 2 to 3 times to obtain a tubular support body with a nanopore diameter.

Embodiment 2

[0037] Wrap the outer surface of the aluminum sol-modified tubular support with nanopores with polytetrafluoroethylene, slowly dip it in 40% phenolic resin in anhydrous ethanol solution for 2 minutes, take it out slowly and at a uniform speed, turn it over and place it vertically, Dry at room temperature for 24 h, vacuum dry for 6 h, and then 2 Programmed temperature rise carbonization under protection. Raise the temperature to 600°C at a rate of 1°C / min, keep it warm for 3 hours, and then cool down to room temperature naturally. Repeat the above steps 3 times to obtain a qualified carbon membrane, and the membrane tube number is M1-3.

[0038] H measured at 30°C 2 , CO 2 , O 2 and N 2 The permeation fluxes were 2.0×10 -9 , 3.8×10 -9 , 1.0×10 -10 and 6.0×10 -11 mol·s -1 m -2 ·Pa -1 , gas selectivity H 2 / N 2 , CO 2 / N 2 , O 2 / N 2 and CO 2 / H 2 33, 63, 1.7 and 1.9 respectively.

Embodiment 3～7

[0040] Add self-made nano-nickel with a particle size of 57nm to 40% phenolic resin in anhydrous ethanol solution, the content of nano-nickel is 1%, 3%, 5%, 7.5% and 10%, and the film is repeatedly coated for 2-3 times. The carbon membranes prepared for the second time, the labels of the membrane tubes are M2-3, M3-3, M4-2, M5-2 and M6-2 respectively. When the nickel content in the carbon film is between 1% and 5%, as the nickel content increases, the H 2 The permeation flux decreases gradually. When the nickel content in the carbon membrane is 5%, the H 2 The permeation flux reaches a minimum, measured at 30 °C for H 2 The permeate flux is 8.0×10 -11 mol·s -1 m -2 ·Pa -1 ; while CO 2 The permeation flux increases gradually. When the nickel content in the carbon membrane is 5%, the CO 2 The permeation flux reaches 3.0×10 -9 mol·s -1 m -2 ·Pa -1 , CO 2 / H 2 The gas selectivity reaches a maximum of 38. When the nickel content is between 5% and 10%, with the gradual...

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Abstract

The present invention relates to char molecule sieve membrane and its method especially the cannular backstop char sieve membrane. It is a new Nami material -char sieve membrane filled Nami material in char sieve membrane. The preparation method is adding Nami material in no water ethanol of bakelite colophony. Nami materials are Nami nickel, Nami NaA molecule, Nami titanium dioxide. The ultrasonic makes Nano material decentralize in the membrane liquid and dip cannular backstop. Nami material has different adsorption ability to some gas. According this, char molecule can permeate or remain some gas. So it can increase or decrease the selectivity of the gas to other gas.

Description

technical field [0001] The invention relates to a carbon molecular sieve membrane and a preparation method thereof, in particular to a tubular supported carbon molecular sieve membrane and a preparation method thereof. Background technique [0002] Carbon molecular sieve membrane is a new type of inorganic separation membrane, which usually refers to a membrane composed of carbon materials. Compared with organic gas separation membranes, carbon membranes have the advantages of good thermal stability, good chemical stability, uniform pore size, wide adjustable range of pore size, good mechanical strength and separation under harsh conditions. [0003] According to different membrane structures, carbon molecular sieve membranes can be divided into unsupported carbon molecular sieve membranes (homogeneous carbon membranes) and supported carbon molecular sieve membranes (composite carbon membranes). The separation effect of unsupported carbon membranes depends on the thickness ...

Claims

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Application Information

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IPC IPC(8): B01D71/02
Inventor 张利雄程新华卢海强徐南平
Owner NANJING UNIV OF TECH
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