Analysis of the interaction of CO2 with Na, K, and Ca-exchanged Mordenite. An infrared spectroscopic study

Aline Villarreal, Perla Castillo-Villalón, Jorge Ramírez

Abstract


To enquire on the CO2 capture on solid adsorbents, the interactions of CO2 with mordenite exchanged with Na, K, and Ca were analyzed using FTIR spectroscopy. The results reveal that physisorbed CO2 and different carbonate species are present on the zeolite surface. At high CO2 concentration, the cation polarizing power determines the type of carbonates formed: mainly bidentate carbonates on Ca-mordenite; bi and polydentate carbonates on Na-mordenite; polydentate carbonates on K-mordenite. At low CO2 (10-4 Torr), mostly bidentate carbonates are formed. Pre-adsorbed water produces bicarbonates and decreases CO2 adsorption.

Keywords


CO2 capture; (Na, K, Ca)-Mordenite; chemisorbed carbonates; IR spectroscopy; interaction CO2-mordenite

Full Text:

PDF

Refbacks

  • There are currently no refbacks.


Copyright (c) 2017 Aline Villarreal, Perla Castillo-Villalón, Jorge Ramírez

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

Journal of the Mexican Chemical Society (J. Mex. Chem. Soc.) Vol 61, No 3 (2017). Quarterly publication (July-September). Edited and distributed by Sociedad Química de México, A.C. Barranca del Muerto 26, Col. Crédito Constructor, Del. Benito Juárez, C.P. 03940, Mexico City. Phone: +5255 56626837; +5255 56626823 Contact: soquimex@sqm.org.mx http://www.sqm.org.mx Editor-in-Chief: Ignacio González-Martínez. Indexed Journal. Certificate of reserved rights granted by the Instituto Nacional del Derecho de Autor (INDAUTOR): 04-2005-052710530600-102. Certificate of lawful title and content: Under procedure. ISSN-e granted by the Instituto Nacional del Derecho de Autor (INDAUTOR): 2594-0317. ISSN granted by the Instituto Nacional del Derecho de Autor (INDAUTOR): 1870-249X. Postal registration of printed matter deposited by editors or agents granted by SEPOMEX: IM09-0312 Copyright © Sociedad Química de México, A.C. Total or partial reproduction is prohibited without written permission of the right holder. The Figures/schemes quality and the general contents of this publication are full responsibility of the authors. Updated October 26th, 2017 by Adriana Vázquez (editorial assistant, e-mail: editor.jmcs@gmail.com), J. Mex. Chem. Soc., Sociedad Química de México, A.C.