Dr Marco Taddei

COFUND Fellow

Person imageDr Marco Taddei
  • COFUND Marie Curie Research Fellow
  • Postdoctoral Fellow, Paul Scherrer Institut – ETH Zürich (Switzerland)
  • Visiting Scholar, University of California, San Diego (USA)
  • Postdoctoral Fellow, Università di Perugia (Italy)
  • PhD, Università di Perugia (Italy)

Project

Metal-organic frameworks based on phosphonate ligands for CO2 capture

Description of the project

Post-combustion carbon capture (CC) from large point sources, such as power plants, is regarded as one of the key technologies for reducing anthropogenic CO2 emissions and mitigate climate change. The ideal sorbent for this application should: i) have high mass uptake capacity; ii) be selective towards CO2 over N2; iii) be able to be regenerated with a low energy penalty; iv) be stable over various working cycles. State-of-the-art technologies on the industrial scale are still based on liquid amine scrubbing, a process known since many decades that suffers from decomposition at high temperature, with consequent loss of performance, and high regeneration costs. Solid sorbents represent an alternative to amine scrubbing. MOFs are crystalline and microporous coordination polymers built from the connection of metal ions or clusters and organic linkers (usually polycarboxylic acids). MOFs are extremely attractive for application in gas sorption/separation (including CC), due to their high surface area. Their practical employment on a large scale is limited, however, by scarce stability towards hydrolysis. In post-combustion CC, where the sorbent is constantly exposed to a flow of gas containing small amounts of water, stability to hydrolysis is crucial. Use of phosphonate linkers for construction of MOFs is not yet well established, due to synthetic and crystallographic challenges. However, phosphonate-based materials usually display outstanding stability and preferential adsorption of CO2 over other gases (including N2). These features make them suitable for application in post-combustion CO2 capture.

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Research Funding

This project has received funding from the European Union’s Seventh Framework Programme for research, technological development and demonstration under grant agreement no 663830.


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