Integrated CO&lt;sub&gt;2&lt;/sub&gt; capture and reduction catalysis: Role of γ-Al&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt; support, unique state of potassium and synergy with copper

Pinto, D.; Minorello, S.; Zhou, Zhouping; Urakawa, A.

doi:10.1016/j.jes.2023.06.006

Integrated CO₂ capture and reduction catalysis

Title

Integrated CO₂ capture and reduction catalysis: Role of γ-Al₂O₃ support, unique state of potassium and synergy with copper

Author

Pinto, D. (TU Delft ChemE/Catalysis Engineering)
Minorello, S. (TU Delft ChemE/Catalysis Engineering)
Zhou, Zhouping (Student TU Delft)
Urakawa, A. (TU Delft ChemE/Catalysis Engineering)

Date

2024

Abstract

Carbon dioxide capture and reduction (CCR) process emerges as an efficient catalytic strategy for CO₂ capture and conversion to valuable chemicals. K-promoted Cu/Al₂O₃ catalysts exhibited promising CO₂ capture efficiency and highly selective conversion to syngas (CO + H₂). The dynamic nature of the Cu-K system at reaction conditions complicates the identification of the catalytically active phase and surface sites. The present work aims at more precise understanding of the roles of the potassium and copper and the contribution of the metal oxide support. While γ-Al₂O₃ guarantees high dispersion and destabilisation of the potassium phase, potassium and copper act synergistically to remove CO₂ from diluted streams and promote fast regeneration of the active phase for CO₂ capture releasing CO while passing H₂. A temperature of 350℃ is found necessary to activate H₂ dissociation and generate the active sites for CO₂ capture. The effects of synthesis parameters on the CCR activity are also described by combination of ex-situ characterisation of the materials and catalytic testing.

Subject

Aluminium oxide
Carbon capture and utilisation
Carbon dioxide
CO capture and reduction
Copper catalysts
Heterogeneous catalysis
Potassium
Solid CO sorbents

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DOI

https://doi.org/10.1016/j.jes.2023.06.006

Embargo date

2024-08-07

ISSN

1001-0742

Source

Journal of Environmental Sciences, 140, 113-122

Bibliographical note

Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Part of collection

Institutional Repository

Document type

journal article

Rights

Files

file embargo until 2024-08-07

Integrated CO2 capture and reduction catalysis

Integrated CO₂ capture and reduction catalysis