Composite hollow fiber membrane and its preparation and application

Abstract

A composite hollow fibre membrane based on the composite resistance Henis membrane model (silica rubber / polysulfone membrane) for separating H2 or N2 with high effect is composed of basic membrane, water-soluble high-molecular layer in rubber state at ordinary temp and silica rubber layer. It can be used for the ammonia synthesizing plant or oil refinary to recover N2 or H2. Its preparing process is also disclosed.

Description

Technical field:

[0001] The invention relates to membrane technology, and in particular provides a secondary-coated hollow fiber composite membrane, a preparation method and an application. Background technique:

[0002] Hydrogen will play an increasingly important role in the energy and petrochemical fields in the 21st century. At present, there are two main methods for obtaining hydrogen sources: one is to use petroleum or coal to produce (hydrogen steam reforming, partial oxidation of gas, hydrogen production by Topsoe method, etc.). The cost is very high, and the production is 1 ton. Hydrogen needs to consume 4 to 5 tons of petroleum. The other is the use of new technologies to recover hydrogen from various hydrogen-containing waste gases, such as membrane hydrogen recovery technology. The latter will be an effective method for the oil refining industry to obtain cheap hydrogen sources.

[0003] Compared with traditional separation technology, membrane separation technology h...

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