Development of Thin Film Composite Hollow Fiber Membranes for Direct Ocean Capture

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Exploratory Topics
Pasadena, California
Project Term:
09/06/2022 - 09/05/2024

Technology Description:

Captura will demonstrate efficient CO2 stripping from oceanwater using low-cost thin film composite hollow fiber membranes. The team will use ultra-low-cost hollow fiber membranes, traditionally used in water filtration applications, as a structural support, and modify their outer layers with highly CO2 permeable polydimethylsiloxane layers to selectively strip CO2 from oceanwater. Captura will also employ a computational model-assisted design and rapidly prototype new gas liquid contactor designs that use counterflow and cross-flow design for efficient CO2 stripping from oceanwater. The team estimates a >10x cost reduction in the capital expenditure for the CO2 stripping unit.


ARPA-E Program Director:
Dr. Simon Freeman
Project Contact:
Chengxiang Xiang
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