| abstract |
The present invention provides a feedstock that contains primarily hydrogen and a lower proportion of impurities consisting essentially of carbon dioxide, carbon monoxide, methane and heavier hydrocarbons. The present invention relates to a process for producing very pure hydrogen from the feed material it contains. The hydrogen adsorption purification method includes a desorption step at a pressure lower than the feed pressure, such as the PSA method, to produce a desorption stream and mainly recover pressurized carbon dioxide and high purity hydrogen in high yield. Can be used for This performance is achieved by combining the continuous steps of the process of the present invention with the use of a new family of adsorbents whose dynamic capacity at high desorption pressures is higher than the dynamic capacity of conventional adsorbents. Is done. |