Steam reforming and other hydrogen-containing off-gas streams typically contain gases such as water vapour, carbon dioxide, carbon monoxide, methane, nitrogen and other trace gases. SP’s PSA  H2-Series remove these contaminants in the adsorber bed at feed pressure. Virtually pure hydrogen passes through the bed with minimal loss in pressure. The impurities are desorbed from the bed as the pressure is reduced to the PSA exhaust pressure. This PSA process is completely reversible and repeats to provide continuous flows, splitting the mixed-feed flow into purified product and exhaust flows. The exhaust gas is typically used as the primary fuel input to the hydrogen-generating reforming process or other fuel, making it a very efficient, integrated process.