Document Type

Article

Abstract

Identification of the existence of pyrocarbonate ion C2O52− in molten carbonates exposed to a CO2 atmosphere provides key support for a newly established bi-ionic transport model that explains the mechanisms of high CO2 permeation flux observed in mixed oxide-ion andcarbonate-ion conducting (MOCC) membranes containing highly interconnected three dimensional ionic channels. Here we report the first Raman spectroscopic evidence of C2O52− as an active species involved in the CO2-transport process of MOCC membranes exposed to a CO2atmosphere. The two new broad peaks centered at 1317 cm−1 and 1582 cm−1 are identified as the characteristic frequencies of the C2O52− species. The measured characteristic Raman frequencies of C2O52− are in excellent agreement with the DFT-model consisting of six overlapping individual theoretical bands calculated from Li2C2O5 and Na2C2O5.

Rights

©Physical Chemistry Chemical Physics (2013), Royal Society of Chemistry.

This article cannot be redistributed of further made available.

This article was first published by the Royal Society of Chemistry and can be found at http://dx.doi.org/10.1039/C3CP52362D

Zhang, L., Huang, X., Qin, C., Brinkman, K., Gong, Y., Wang, S., & Huang, K. (2013). First Spectroscopic Identification of Pyrocarbonate for High CO2 Flux Membranes Containing Highly Interconnected Three Dimensional Ionic Channels. Physical Chemistry Chemical Physics, 15 (31), 13147 - 13152. http://dx.doi.org/10.1039/C3CP52362D

Download

Share

COinS