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

Authors

  • Aline Villarreal Universidad Nacional Autónoma de México
  • Perla Castillo-Villalón Universidad Nacional Autónoma de México
  • Jorge Ramírez Universidad Nacional Autónoma de México

DOI:

https://doi.org/10.29356/jmcs.v61i2.257

Keywords:

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

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.

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Author Biographies

Aline Villarreal, Universidad Nacional Autónoma de México

UNICAT, Dpto. Ingeniería Química, Facultad de Química

Perla Castillo-Villalón, Universidad Nacional Autónoma de México

UNICAT, Dpto. Ingeniería Química, Facultad de Química

Jorge Ramírez, Universidad Nacional Autónoma de México

UNICAT, Dpto. Ingeniería Química, Facultad de Química

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Published

2017-10-12

Issue

Vol. 61 No. 2 (2017): Special Issue dedicated to Prof. Roberto Sánchez-Delgado

Section

Regular Articles

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