Solubility of carbon dioxide in aqueous solutions of amino acid salts

• Type: Article in International Scientific Journal
• Date: 2009

Authors

A. F. Portugal (Author) FEUP; J. M. Sousa (Author) FEUP; F. D. Magalhães (Author) FEUP; A. Mendes (Author) FEUP

Journal

Title: Chemical Engineering Science

Vol. 64

Pages: 1993-2002

ISSN: 0009-2509

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 103 Citations

ISI Web of Science

Scopus - 130 Citations

COMPENDEX

Scientific classification

FOS: Engineering and technology > Other engineering and technologies

CORDIS: Technological sciences

Other information

Authenticus ID: P-003-K85

DOI: 10.1016/j.ces.2009.01.036

Abstract (EN): The solubility of CO(2) in aqueous solutions of potassium glycinate was measured in a stirred reactor, at temperatures from 293 to 351 K, for amino acid salt concentrations ranging between 0.1 and 3.0 mol dm(-3) and CO(2) partial pressures up to 6 x 10(4) Pa. CO(2) Solubility in potassium threonate 1.0 mol dm(-3) was also measured at 313 K. It was observed that amino acid salt solutions can be very interesting for CO(2) absorption purposes since they present considerably high absorption capacities. Nevertheless, CO(2) solubility in these solutions does not change significantly for temperatures between 293 and 323 K, which can be a draw back concerning the absorbent regeneration. Potassium glycinate solubility data were interpreted using the thermodynamically sound model proposed by Deshmukh and Mather [1981. A mathematical-model for equilibrium solubility of hydrogen-sulfide and carbon-dioxide in aqueous alkanolamine solutions. Chemical Engineering Science 36 (2). 355-362] and the empirical Kent and Eisenberg [1976. Better data for amine treating. Hydrocarbon Processing 55(2), 87-90] model.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10