Carbon dioxide absorption kinetics in potassium threonate

• Type: Article in International Scientific Journal
• Date: 2008

Authors

A. F. Portugal (Author) Other; F. D. Magalhães (Author) FEUP; A. Mendes (Author) FEUP

Journal

Title: Chemical Engineering Science

Vol. 63

Pages: 3493-3503

ISSN: 0009-2509

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 37 Citations

ISI Web of Science

Scopus - 50 Citations

COMPENDEX

Scientific classification

FOS: Engineering and technology > Chemical engineering

CORDIS: Technological sciences > Technology

Other information

Authenticus ID: P-003-XXH

DOI: 10.1016/j.ces.2008.04.017

Abstract (EN): The absorption of carbon dioxide in potassium threonate aqueous solutions is studied at concentrations ranging from 0.1 to 3 M and temperatures from 293 to 313 K. This study includes experimental density, viscosity, solubility of N2O and absorption kinetics of CO2 (using a stirred cell reactor) data obtained for the various potassium threonate solutions. The diffusion coefficients Of CO2 and potassium threonate in the absorption solutions are estimated using a modified Stokes-Einstein relation. N2O solubility is interpreted using the Schumpe [1993. The estimation of gas solubilities in salt-solutions. Chemical Engineering Science 48(1), 153-158] model and CO2 physical solubility estimated. Physical absorption experiments were performed in the stirred cell in order to determine the physical mass transfer coefficients. The kinetics results are interpreted using both the pseudo-first-order and the DeCoursey approaches. It was concluded that CO2 absorption in the aqueous potassium threonate solutions is well represented by -r(CO2) = 4.13 x 10(8) exp (-3580/T) C-S exp(0.90C(S))C-CO2

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 11