Title

Post-Spinning Infusion of Poly(ethyleneimine) into Polymer/Silica Hollow Fiber Sorbents for Carbon Dioxide Capture

Abstract

Amine-loaded hollow fiber sorbents for CO₂ capture from dilute gas streams are created using a novel post-spinning amine-infusion technique. This technique infuses poly(ethyleneimine) (PEI) into cellulose acetate/mesoporous silica hollow fiber sorbents during the solvent exchange steps after dry-jet, wet-quench, non-solvent induced phase separation spinning. A suitable post-spinning infusing solution was found to be 10% PEI in methanol with an infusion time of 4h. After amine infusion, the 51 wt% silica hollow fiber sorbents are demonstrated to have a nitrogen loading of 0.52 mmol/g-fiber and a CO₂ uptake of 1.2 mmol/g-fiber, at equilibrium. Amine-loaded fibers are packaged into a shell-and-tube module and exposed on the shell side to simulated flue gas with an inert tracer (10 mol% CO₂, 80 mol% N₂ and 10 mol% He at 100% relative humidity; 1 atm, 35°C). The fibers are shown to have a breakthrough CO₂ capacity of 0.58 mmol/g-fiber and CO₂ uptake after 20 min of 0.92 mmol/g-fiber (1 atm and 35°C). Under the same conditions, the water uptake was found to be 3.2 mmol/g-fiber. The preparation of amine-containing polymeric hollow fibers and demonstration of their CO₂ adsorption properties is an important step towards realizing new, scalable process configurations for supported amine sorbents relevant to post-combustion CO₂ capture.

Department(s)

Chemical and Biochemical Engineering

Comments

The authors acknowledge the DOE-NETL under contract DE-FE0007804 and GE for financial support.

Keywords and Phrases

Adsorption Properties; Amine Sorbent; Carbon Dioxide Capture; Cellulose Acetates; Dilute Gas; Hollow Fiber; Hollow Fiber Sorbents; Nitrogen Loading; Non-Solvents; Polyethyleneimine; Post Spinnings; Post-Combustion CO; Process Configuration; RTSA; Shell-and-Tube; Shell-Side; Simulated Flue Gas; Solvent Exchanges; Water Uptake; Carbon Dioxide; Fibers; Flue Gases; Internet Protocols; Methanol; Organic Compounds; Phase Separation; Polyetherimides; Polymers; Silica; Sorbents; Sorption; Spinning (Fibers); CO2 Capture; Flue Gas; PEI

International Standard Serial Number (ISSN)

1385-8947

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2013 Elsevier, All rights reserved.

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