FIELD: chemical technology.
SUBSTANCE: group of inventions relates to a system and method for separation and purification, such as a system and method for separating hydrogen and helium from boil-off gas. A system and method for separating and purifying hydrogen and helium from boil-off gas are disclosed. The system comprises a membrane separation unit and an adsorption separation unit, which are connected in series, wherein the membrane separation unit comprises a primary membrane separation device and a deep membrane separation device, which are connected in series, and the adsorption separation unit comprises a transient pressure adsorption unit and a hydrogen and helium separation and purification unit, which are connected in series. The total concentration of hydrogen and helium in the boil-off gas is 1-15 vol.%. The method for separating hydrogen and helium in boil-off gas is carried out by using a system for separating and purifying hydrogen and helium from boil-off gas.
EFFECT: separation and purification of hydrogen and helium from boil-off gas.
10 cl, 10 dwg, 9 ex
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