Gas separation: processes – With control responsive to sensed condition – Concentration sensed
Patent
1998-03-27
1999-09-14
Spitzer, Robert
Gas separation: processes
With control responsive to sensed condition
Concentration sensed
95 97, 95104, 95146, 96111, 96128, 96130, 96144, 96337, 96345, B01D 53047
Patent
active
059517417
ABSTRACT:
An improved process and apparatus are provided for recovering hydrocarbons from an intermittent or continuous inlet air-hydrocarbon vapor mixture. The air-hydrocarbon vapor mixture is caused to flow through a bed of solid adsorbent whereby hydrocarbons are removed therefrom and a residue gas stream of substantially hydrocarbon-free air is produced. The substantially hydrocarbon-free air is vented into the atmosphere and a second bed of solid adsorbent having hydrocarbons previously adsorbed thereon is regenerated by evacuation. As long as the concentration of hydrocarbons contained in the vented air is below a predetermined concentration, the inlet air-hydrocarbon vapor mixture is caused to continue to flow through the first bed of adsorbent. After the second bed of adsorbent is regenerated, the pumping and evacuation of the second bed is shut down and not restarted so long as the monitored concentration of hydrocarbons is below the predetermined concentration.
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Dahl Randall F.
Fox Scott J.
Greenfield Devin E.
Steiner Thomas M.
Dougherty, Jr. C. Clark
John Zink Company
Spitzer Robert
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