Identification of Active Surface Species in Molten Carbonates Using in situ Raman Spectroscopy

Author(s)

Peng Zhang
Tao Wu
Kevin Huang, University of South Carolina - ColumbiaFollow

Document Type

Article

Abstract

Here we report the results of a study on active surface species of a pristine and modified (Li-Na)₂CO₃ eutectic using in situ Raman spectroscopy technique. The effects of gas compositions, temperature, time, and alkaline earth have been systematically studied. The species of CO₄^2–, HCO₄^–, and C₂O₅^2– are identified as the three major active species on the surface of (Li-Na)₂CO₃ eutectic by a combined Raman spectroscopy and theoretical density functional theory calculations. The results further reveal that CO₄^2–, HCO₄^–, and C₂O₅^2– are preferably formed in the presence of O₂, H₂O, and high CO₂ concentration. With the addition of Ba to the pristine (Li-Na)₂CO₃ eutectic, the Raman CO₄^2–/HCO₄^– shifts become more pronounced.

Digital Object Identifier (DOI)

https://doi.org/10.3389/fenrg.2021.653527

Publication Info

Published in Frontiers in Energy Research, Volume 9, 2021.

Rights

© 2021 Zhang, Wu and Huang. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

APA Citation

Zhang, P., Wu, T., & Huang, K. (2021). Identification of Active Surface Species in Molten Carbonates Using in situ Raman Spectroscopy. Frontiers in Energy Research, 9. https://doi.org/10.3389/fenrg.2021.653527