Device for regulating the gas purity for a gas storage

The invention relates to a method and a device for regulating the gas purity when filling a gas storage (41) in which a sorbent material (82) is accommodated. The gas reservoir (41) is connected upstream of a heated filter (46) whose filter material is regenerable or interchangeable. The filter (46) is a first shutoff valve (44) and the gas storage (41) is a second check valve (54) upstream. In the filter (46) retained high molecular weight hydrocarbons C