NOVELTY - The process for purification or separation of a flow of supply gas with impurities e.g. carbon dioxide and a mixture of water and methanol, comprises contacting the supply gas with a first and a second adsorbent for eliminating the impurities, recuperating the purified or separated gas, heating a regenerated gas (30) using an electric vapor heater (80), and periodically regenerating the adsorbent with the regenerated gas. The heater has a skin temperature of less than or equal to 175 degrees C and a pressure of 8-12 bars, and is equipped with a unit for controlling the skin temperature.    USE - The process is useful for purification or separation of a flow of supply gas with impurities e.g. carbon dioxide and a mixture of water and methanol (claimed).    ADVANTAGE - The process is capable of effectively, fastly and safely purifying or separating the flow of supply gas having impurities such as carbon dioxide and a mixture of water and methanol without any interventions and without replacing the adsorbents thus minimizing the parasitic reactions.    DETAILED DESCRIPTION - The process for purification or separation of a flow of supply gas with impurities e.g. carbon dioxide and a mixture of water and methanol, comprises contacting the supply gas with a first and a second adsorbent for eliminating the impurities, recuperating the purified or separated gas, heating a regenerated gas (30) using an electric vapor heater (80), and periodically regenerating the adsorbent with the regenerated gas. The heater has a skin temperature of less than or equal to 175 degrees C and a pressure of 8-12 bars, and is equipped with a unit for controlling the skin temperature. The temperature of regeneration is greater than or equal to 150 degrees C. The vapor used in the heater is obtained by vapor expansion with high pressure. The first adsorbent is mixed in an absorption bed. Partial pressure of carbon monoxide in the regeneration gas is lower than 0.5 bar. The supply gas is obtained by vapor reforming process, partial oxidation and/or gasification of carbon or residues, and undergoes a pretreatment such as washing of amines or methanol before its purification.    DESCRIPTION OF DRAWING(S) - The figure shows a unit for purifying or separating the flow of supply gas having impurities.    Amines (10)    Adsorber (11)    Regenerated gas (30)    First cryogenic exchanger (70)    Heater. (80)