Methods for the separation of CO2 from a gas stream

Ho, W. S. Winston; Han, Yang

Title: Methods for the separation of CO2 from a gas stream

Patent · Tue Jun 14 00:00:00 EDT 2022

OSTI ID:1893023

Ho, W. S. Winston; Han, Yang

Disclosed herein are 2-stage membrane separation methods for capturing CO2 from a feed gas. The methods can employ two selectively permeable membranes, which may be the same or different. The selectively permeable membrane can have a carbon dioxide permeance of from 500 to 3000 GPU at 57° C. and 1 atm feed pressure and a carbon dioxide:nitrogen selectivity of from 10 to 1000 at 57° C. and 1 atm feed pressure. High pressure ratios across the membranes can be achieved by compressing the feed gas to a high pressure, by using vacuum pumps to create a lowered pressure on the permeate side of the membrane, by using a sweep stream, or a combination thereof. When a sweep stream is used, the sweep stream may include a portion of the retentate gas stream obtained from the retentate side of one or more of the membranes used.

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Research Organization:: The Ohio State Univ., Columbus, OH (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: FE0007632

Assignee:: The Ohio State University (Columbus, OH)

Patent Number(s):: 11,358,093

Application Number:: 15/577,951

OSTI ID:: 1893023

Resource Relation:: Patent File Date: 05/23/2016

Country of Publication:: United States

Language:: English

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