Hollow fiber membrane reactor for gaseous oxidation reaction, preparation and application thereof

A technology of fiber membrane reactor and gas-phase oxidation, which is applied in chemical methods, chemical instruments and methods, and membrane technology for reacting liquid and gas media, and can solve the problems of high price and limited industrialization and application of membrane reactors.

Inactive Publication Date: 2010-06-16
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the price of noble metal Pd is expensive, whic...

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  • Hollow fiber membrane reactor for gaseous oxidation reaction, preparation and application thereof
  • Hollow fiber membrane reactor for gaseous oxidation reaction, preparation and application thereof
  • Hollow fiber membrane reactor for gaseous oxidation reaction, preparation and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0055] Fabrication and Application of Hollow Fiber Membrane Reactor for CO Combustion

[0056] First follow La 0.8 Sr 0.2 Cr 0.5 Fe 0.5 o 3 The stoichiometric ratio of (LSCF) accurately weighed SrCO 3 , La 2 o 3 and Cr 2 o 3 and Mn 2 o 3 , after mixing the raw materials, use ethanol as the medium to ball mill for 24 hours; after drying, sinter and react at 1200°C for 10 hours to obtain the LSCF product in the pure perovskite phase, and pulverize to obtain the electronically conductive phase powder. The ion-conducting phase adopts commercial fluorite-type Zr 0.84 Y 0.16 o 1.92 (YSZ) powder.

[0057] The above-mentioned LSCF and YSZ powders were mixed according to the volume ratio of 40:60, and mixed uniformly by ball milling in ethanol for 24 hours. Powder raw material.

[0058] Mix 0.86% polyvinylpyrrolidone, 3.46% polyethersulfone, 19.68% N-methyl-1-pyrrolidone and 76% LSCF / YSZ mixed powder and ball mill for 48 hours to obtain a uniform slurry , and the resul...

Embodiment 2

[0062] Preparation and Application of Hollow Fiber Membrane Reactor for Partial Oxidation of Methane

[0063] The hollow fiber membrane reactor used for the partial oxidation of methane needs to attach a catalyst coating to the wall of its oxygen permeable membrane. This embodiment takes the preparation of the LSCF / YSZ hollow fiber membrane reactor with a Ni-based catalyst coating on the inner wall as an example to illustrate the preparation and application of this type of reactor in the present invention. The specific implementation steps are as follows:

[0064] Mix 0.2% polyvinylpyrrolidone, 5.18% polyethersulfone, 42.62% N-methyl-1-pyrrolidone and 52% of the LSCF / YSZ mixed powder in Example 1 and ball mill for 48 hours , to obtain a homogeneous slurry, the resulting slurry was vacuum degassed for two hours. Then adopt the spinneret that the interlayer gap that is formed by two concentric circular tubes inside and outside is 1.0mm, inner pipe hole diameter is the spinnere...

Embodiment 3

[0071] Preparation and Application of Hollow Fiber Membrane Reactor for Methane Combustion

[0072] In this example, Sr 0.3 Ba 0.5 La 0.2 MnAl 11 o 19 The catalyst-coated LSCF / YSZ hollow fiber membrane reactor is taken as an example to specifically illustrate the preparation and application of this type of reactor in the present invention.

[0073] Mix 0.5% polyvinylpyrrolidone, 5.92% polyethersulfone, 33.58% N-methyl-1-pyrrolidone and 60% of the LSCF / YSZ mixed powder in Example 1 and ball mill for 48 hours , to obtain a homogeneous slurry, the resulting slurry was vacuum degassed for two hours. Then adopt the spinneret that the interlayer gap that is formed by two concentric circular tubes inside and outside is 1.0mm, inner pipe hole diameter is 2.0mm as the extrusion die, make the slurry pass through the interlayer gap of the spinneret under 0.03MPa pressure, at the same time Under the pressure of 0.01MPa, tap water at a temperature of 25°C is extruded from the inner t...

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Abstract

The invention discloses a hollow fiber membrane reactor for gaseous oxidation reaction, a preparation method and application thereof. The membrane reactor is made of a compact hollow fiber oxygen permeation membrane, wherein the wall thickness of a pipe is between 0.1 and 0.3mm, and the outer pipe diameter is between 1 and 3mm; the oxygen permeation membrane is made of a dual-phase composite ceramic oxygen permeation membrane material which is prepared by mixing an electron conductive phase material and an ion conductive phase material in a volume ratio of 0.43-1.5:1; the electron conductive phase material is provskite-type chromic lanthanum composite oxide (Ln1-xAx)1-zCr1-yByO3 and/or strontium titanate-based composite oxide (LnxSr1-x)1-zTi1-yByO3; and the ion conductive phase material is stabilized fluorite type zirconium dioxide Zr1-x1Rx1O2-delta, or doped cerium dioxide R'z1Ce1-z1O2-delta. The method for preparing the membrane reactor comprises the following steps: mixing the electron conductive phase material and the ion conductive phase material in the volume ratio of 0.43-1.5:1 to prepare a hollow fiber membrane blank by adopting a wet phase inversion method; and sintering the blank at the temperature of between 1,300 and 1,600 DEG C for 10 to 18 hours. The membrane reactor has high oxygen permeation performance, excellent high temperature reduction resistance and long-term stability and low production cost.

Description

technical field [0001] The invention belongs to the field of membrane technology, and more specifically relates to a high-stability dual-phase ceramic hollow fiber membrane reactor for gas-phase oxidation and its preparation method and application. Background technique [0002] Ceramic oxygen-permeable membrane reactor is a chemical operation unit that couples oxygen separation and purification with oxygen-consuming chemical reaction, and has a wide range of applications in the fields of chemical industry, energy and environmental protection. For example, a ceramic oxygen permeable membrane is used to fill a methane deep oxidation catalyst to form a membrane reactor for methane combustion. As another example, a ceramic oxygen-permeable membrane is used to fill the partial oxidation of methane catalyst to form a membrane reactor for partial oxidation of methane to synthesis gas (H 2 +CO). One side of the oxygen permeable membrane is a high oxygen partial pressure oxygen-con...

Claims

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Application Information

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IPC IPC(8): B01J10/00B01D71/02B01D69/08B01D53/22C01B3/38
Inventor 刘建军何炜陈初升高建峰汪文栋
Owner UNIV OF SCI & TECH OF CHINA
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