Characterization of potassium glycinate for carbon dioxide absorption purposes

• Tipo: Artigo em Revista Científica Internacional
• Data: 2007

Autores

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

Revista

Título: Chemical Engineering Science

Vol. 62

Páginas: 6534-6547

ISSN: 0009-2509

Editora: Elsevier

Indexação

ISI Web of Knowledge - 106 Citações

ISI Web of Science

Scopus - 135 Citações

INSPEC

COMPENDEX

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia química

CORDIS: Ciências Tecnológicas > Tecnologia > Tecnologia química

Outras Informações

ID Authenticus: 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 14