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US 2011/0094378 A1Published application
Oxygen Removal From Contaminated Gases
AssigneeGuild Associates, Inc.
InventorMichael J. Mitariten
Life of this patent
Estimating the term…
Abstract
The invention relates to a method for achieving low oxygen levels in a natural gas stream without the use of a catalytic system. In one embodiment, the method comprises: membrane treatment for the removal of the bulk of CO2 and oxygen in the natural gas feed and the addition of a PSA system using a carbon molecular sieve adsorbent for the adsorption of residual oxygen.
Claims25
A process for the improved separation of oxygen from a natural gas feed stream which comprises:
- a. passing said natural gas feed stream to a first separation unit so as to separate oxygen from said feed stream and produce a first product stream enriched with methane and a waste stream having a higher molar concentration of oxygen than said feed stream;
- and
- b. passing said first product stream to a second separation unit containing an oxygen-selective adsorbent and operated with a pressure swing so as to preferentially adsorb said oxygen to produce a low pressure gas stream enriched with oxygen and produce a higher pressure second product stream enriched with methane.
A process for the improved separation of oxygen from a natural gas feed stream, which comprises:
- a. passing said natural gas feed stream to a membrane separation unit so as to separate oxygen from said feed stream and produce a first product stream enriched with methane and a waste stream having a higher molar concentration of oxygen than said feed stream;
- b. passing said first product stream to a pressure swing adsorption unit containing a carbon molecular sieve so as to preferentially adsorb oxygen to produce a low pressure gas stream enriched with oxygen and to produce a second product stream enriched with methane;
- and
- c. recycling said low pressure gas stream back to said feed stream for said membrane separation unit.
1 more element
Dependencies are inferred from the claim text.