Process for catalytic reforming

A process for catalytic reforming, comprising:

• A) catalytically reforming a hydrocarbon feed in a reaction zone;
• B) obtaining an effluent stream comprising hydrogen and hydrocarbons from the reaction zone;
• C) separating a reformate liquid stream and a gas stream, comprising hydrogen and at least one of nitrogen, one or more carbon oxides, and one or more C1-C6hydrocarbons, from the effluent stream;
• D) recycling at least a portion of the gas stream to the reaction zone;
• E) passing at least another portion of the gas stream to said downstream adsorption zone to separate hydrogen;
• F) withdrawing a hydrogen product stream from the adsorption zone;
• G) withdrawing a tail gas stream from the adsorption zone;
• H) compressing and cooling the tail gas stream;
• I) passing at least a portion of the compressed and cooled tail gas stream as a feed stream across a feed side of said downstream membrane zone comprising a polyimide, cellulose acetate, cellulose triacetate, or polysulfone membrane having the feed side and a permeate side, and being selective for hydrogen over at least one of nitrogen, the one or more carbon oxides, and the one or more C1-C6 hydrocarbons;
• J) withdrawing from the permeate side a permeate stream enriched in hydrogen compared to a residue stream, sending at least a part of said permeate stream as the hydrogen rich gas recycle stream to the at least another portion of the gas stream;
• and
• K) withdrawing from the feed side the residue stream enriched in at least one of nitrogen, the one or more carbon oxides, and the one or more C1-C6 hydrocarbons compared to the permeate stream.