METHOD OF PRESSURE SWING ADSORPTION WITH REGULATION

摘要

A method of pressure swing adsorption (PSA) for producing a gas stream enriched in a compound X from a feed gas stream, implementing at least 2 adsorbers, each adsorber being subjected to a pressure cycle having a high pressure and a low pressure and comprising the following successive steps: a) adsorption at the high pressure of the cycle, producing the gas stream enriched in compound X, b) depressurisation to the low pressure of the cycle, producing at least a part of an elution gas, c) elution at the low pressure by means of the elution gas, d) repressurisation to the high pressure, characterised in that: the pressure cycle has a phase time corresponding to the duration of a pressure cycle divided by the number of adsorbers, and the pressure of the pressure cycle located between the high pressure and the low pressure of the pressure cycle is modified so as to keep the phase time of the PSA equal to or within ± 5% of the nominal phase time, corresponding to the phase time of the PSA in design conditions, during at least a part of the range of variation of the operating conditions.