First Spectroscopic Identification of Pyrocarbonate for High CO2 Flux Membranes Containing Highly Interconnected Three Dimensional Ionic Channels
Abstract
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 2013
- Accession Number
- ADA626911
Entities
People
- Changyong Qin
- Kevin Huang
- Kyle Brinkman
- Lingling Zhang
- Siwei Wang
- Xinyu Huang
- Yunhui Gong
Organizations
- Benedict College