Treatment of catalytic reformer effluent, includes stage of gas separation through hydrogen-permeable membrane with recycling of retentate to recompression

摘要

A gaseous phase enriched in hydrogen from the re-contacting stage is separated using a hydrogen-permeable membrane, to obtain a permeate with a hydrogen content 90% or more, and a retentate. At least part of the retentate is recycled directly into a recompression stage. The hydrogen-rich gaseous phase from re-contacting is compressed before being purified during the separation stage. The compression stage is carried out by at least two compressors and the retentate is recycled into a stages upstream of the compressor train.