K-Promoted Hydrotalcites for CO2 Capture in Sorption Enhanced Reactions

• Type: Article in International Scientific Journal
• Date: 2013

Authors

Wu, YJ (Author) Other; Li, P (Author) Other; Yu, JG (Author) Other; Cunha, AF (Author) Other; Alírio Rodrigues (Author) FEUP

Journal

Title: Chemical Engineering and Technology

Vol. 36

Pages: 567-574

ISSN: 0930-7516

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 26 Citations

Scopus - 17 Citations

Scientific classification

FOS: Engineering and technology > Chemical engineering

CORDIS: Technological sciences > Engineering > Chemical engineering

Other information

Authenticus ID: P-005-26J

DOI: 10.1002/ceat.201200694

Abstract (EN): Potassium-promoted hydrotalcite-like material was prepared with potassium nitrate as the K precursor. The highest ever reported CO2 adsorption capacity (1.13molkg1) was obtained at 656K with pCO2=0.5bar at humid conditions. A mathematical model was developed and it satisfactorily simulated the adsorption and desorption processes. The stability of the material was tested with repeated adsorption/desorption cycles; the CO2 adsorption capacity decreased around 7% after ten cycles. In addition, regeneration was performed with temperature swing operation (from 656K to 708K), where a complete regeneration was achieved within 60min, which reduced to half the time required for regeneration under isothermal conditions.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8