A.V.Luikov Heat and Mass Transfer Institute of the NAS of Belarus offers consumers a technology for producing selectively permeable diffusion membranes of a new generation from anodic aluminum oxide under a commercial agreement with technical assistance, membranes from anodic aluminum oxide and gas separation installations under a manufacturing agreement and is looking for partners to conclude a technical cooperation agreement.

Traditionally, separation, purification and enrichment of gas mixtures until recently were carried out by cryogenic, absorption, adsorption and catalytic methods. However, in recent years, membrane methods for the separation of gas mixtures, which are characterized by simplicity and reliability, economy, low energy consumption, and high industrial and environmental safety, have been increasingly used in industry.

A.V.Luikov Heat and Mass Transfer Institute of the NAS of Belarus has developed a technology for obtaining selective-permeable diffusion membranes of a new generation from anodic alumina, which have a small thickness (<100 μm) with ordered porosity and a pore packing density of up to 10¹² - 10¹⁴ cm^-2.

In the manufacture of membranes, special attention is paid to reducing the thickness while maintaining mechanical strength, since the diffuse flux through the membrane is inversely proportional to the thickness of the membrane, which helps to reduce unit costs.

For effective separation of the gas mixture, the pore diameter in the membranes is selected in such a way that only the Knudsen flow is realized, which contributes to the separation process, reducing selectivity.

Anode alumina is a high-tech material that allows membranes of any shape to be obtained through the use of processing methods such as photolithography, local electrochemical oxidation, and precision etching.

On the basis of numerical simulation, the optimal geometric and technological parameters of the membrane element and the membrane unit were determined, which made it possible to achieve the maximum efficiency of the membrane gas separation process.

The results of enrichment for the heavy component for a single-stage passage of the gas mixture through a single diffusion element:

Gas mixture components	Initial composition, %	Composition of the retentate, %
He	99	97.67
CH4	1	2.33
He	95	84.2
CH4	5	15.8
H2	99.9	99.08
N2	0.1	0.92

Applications: chemical, petrochemical, pharmaceutical and food industries, biotechnology.

The Institute offers partners:
* technology for producing selectively permeable diffusion membranes of a new generation from anodic aluminum oxide under a commercial agreement with technical assistance;
* membranes from anodic aluminum oxide and gas separation installations under a manufacturing agreement;
* joint development of technology for producing selectively permeable diffusion membranes of a new generation from anodic aluminum oxide under a technical cooperation agreement.

More."Actual developments, research, measurements and tests" Catalog-2021, pp.31-32 (in Russian)

The developed membranes have a number of promising advantages:
- the use of standard methods and equipment of microelectronics can significantly reduce the material consumption, labor intensity of production, the cost of the product;
- the formation of porous structures by group methods used in microelectronics technology significantly increases the yield and reproducibility of the parameters of diffusion membranes;
- the possibility of equipping the membranes with various structural elements: fastening shells, reinforcing beams, etc., and these elements are performed directly on the membrane during its manufacture.

A.V.Luikov Heat and Mass Transfer Institute of the National Academy of Sciences of Belarus is the largest scientific institution in the republic dealing with the solution of fundamental and applied problems of heat and mass transfer, fluid dynamics, power engineering, heat engineering, chemical physics, physics of combustion and explosion, nanotechnology, as well as the creation of energy-efficient and environmentally friendly technologies and equipment, apparatus and devices for power engineering and mechanical engineering, agro-industrial complex and construction industry, medicine, chemical, electronic, radio engineering, food industry, space industry.

The Institute carries out scientific, scientific-organizational, and scientific-production interaction with academic and industrial research institutes, universities, design bureaus, associations, and enterprises of Belarus, Russia, Ukraine, Kazakhstan, Moldova, Uzbekistan, Lithuania, Latvia, China, USA, India, Germany, Poland , Czech Republic, Israel, Brazil, Italy, France, and other countries.

Consumers interested in purchasing technology for producing selectively permeable diffusion membranes of a new generation from anodic aluminum oxide under a commercial agreement with technical assistance, membranes from anodic aluminum oxide and gas separation installations under a manufacturing agreement.

Partners interested in developing technology for producing selectively permeable diffusion membranes of a new generation from anodic aluminum oxide under a technical cooperation agreement.