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首页> 美国政府科技报告 >First Spectroscopic Identification of Pyrocarbonate for High CO2 Flux Membranes Containing Highly Interconnected Three Dimensional Ionic Channels.
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First Spectroscopic Identification of Pyrocarbonate for High CO2 Flux Membranes Containing Highly Interconnected Three Dimensional Ionic Channels.

机译：含高度互连三维离子通道的高CO2通量膜的焦碳酸盐的首次光谱鉴定。

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摘要

Identification of the existence of pyrocarbonate ion C2O5(exp2-) 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 and carbonate-ion conducting (MOCC) membranes containing highly interconnected three dimensional ionic channels. Here we report the first Raman spectroscopic evidence of C2O5(exp2-) as an active species involved in the CO2-transport process of MOCC membranes exposed to a CO2 atmosphere. The two new broad peaks centered at 1317 cm(exp -1) and 1582 cm(exp -1) are identified as the characteristic frequencies of the C2O5(exp2-) species. The measured characteristic Raman frequencies of C2O5(exp2-) are in excellent agreement with the DFT-model consisting of six overlapping individual theoretical bands calculated from Li2C2O5 and Na2C2O5.

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