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In this paper, sandwich structures for the separation of gas mixtures are considered. As a result, two types of structures were created and tested: a model complex structure based on a carbon nanotube and a graphene sheet, which consisted of 360 carbon atoms and a sandwich structure composed of a graphene sheet and two parallel carbon nanotubes. The results show that some materials collected from such cell structures can potentially be used for the separation of methane-helium mixtures. The results of calculations for methane and helium are presented.

This paper devoted to creation of two-level liquid cooling system of PC. We found the solution to change a traditional air cooling system for the liquid cooling system with ethylene glycol as a coolant. The cooling system managed to reduce the temperature by up to 4-10°C while down time and ~11°C while load time.

This paper investigates the ability of a test molecule to overcome the energy barrier being in the gap between spherical nanoparticles. Three particles make a primitive structural element of composite porous material. The ability of molecules to converge with nanoparticles and then to move through more powerful repulsion field defines the filtration properties of porous materials. This paper presents the investigation of carbon nanoparticles and molecules of helium and methane bombarding them. Calculations proved that methane molecules can not get through three particles if the gap equals to 3.5 nm. For helium molecules this value makes 1.02 nm. These gaps remain the same when the size of nanoparticles increases. Therefore filters for helium separated from natural gas are to have nanopores within the range from 1.02 nm to 3.5 nm.