Characterization of potassium glycinate for carbon dioxide absorption purposes

• Type: Article in International Scientific Journal
• Date: 2007

Authors

A. F. Portugal (Author) Other; P. W. J. Derks (Author) Other; G. F. Versteeg (Author) Other; F. D. Magalhães (Author) FEUP; A. Mendes (Author) FEUP

Journal

Title: Chemical Engineering Science

Vol. 62

Pages: 6534-6547

ISSN: 0009-2509

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 106 Citations

ISI Web of Science

Scopus - 135 Citations

INSPEC

COMPENDEX

Scientific classification

FOS: Engineering and technology > Chemical engineering

CORDIS: Technological sciences > Technology > Chemical technology

Other information

Authenticus ID: P-004-5WE

DOI: 10.1016/j.ces.2007.07.068

Abstract (EN): Aqueous solutions of potassium glycinate were characterized for carbon dioxide absorption purposes. Density and viscosity of these solutions, with concentrations ranging from 0.1 to 3 M, were determined at temperatures from 293 to 313 K. Diffusivity of CO2 in solution was estimated applying the modified Stokes-Einstein relation. Solubilities of N2O at the same temperatures and concentrations were measured and the ion specific parameter based on Schumpe's model was determined for the glycinate anion; the solubilities of CO2 in these solutions were then computed. The reaction kinetics of CO2 in the aqueous solution of potassium glycinate was determined at 293, 298 and 303 K using a stirred cell reactor. The results were interpreted using the DeCoursey equation for the calculation of the enhancement factor. The rate of absorption as a function of the temperature and solution concentration for the conditions studied was found to be given by the following expression: -r(CO2) = 2.42 x 10(16) exp (-8544/T) exp(0.44C(S))CSCCO2.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 14