{HEAD ~ The carbon dioxide PSA unit} produces a hydrogen rich stream which is recycled to the feed to the steam reformer, {TAIL ~ a carbon dioxide rich recycle stream} which is recycled to the carbon dioxide PSA unit feed and a carbon dioxide rich product stream which is introduced under pressure to a liquifier 
{ HEAD ~ The carbon dioxide PSA unit } produces a hydrogen rich stream which is recycled to the feed to the steam reformer , { TAIL ~ a carbon dioxide rich recycle stream } which is recycled to the carbon dioxide PSA unit feed and a carbon dioxide rich product stream which is introduced under pressure to a liquifier
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