Patent ID: 6129780
Filing Date: 2000-10-10
Classification: B01D,B01J,Y02C

Abstract:
In a process for the purification of a gaseous flow containing at least one impurity selected from the group consisting of carbon dioxide, water vapor and hydrocarbon, comprising adsorbing at least one of said impurities on at least one first bed of adsorbent comprising at least one first adsorbent material; the improvement wherein at least one bed of ballast comprising at least one ballast material consisting of inert alumina and having a density at least twice that of the density of said first adsorbent material is located downstream of said first adsorbent bed, said at least one ballast bed exerting mechanical pressure on at least a portion of at least said first adsorbent bed, and wherein the gas to be purified is passed upward through said at least one first bed of adsorbent and then through said at least one bed of ballast material.