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

被引：2
|
作者：
Zhang, Peng [1 ]
Wu, Tao [1 ]
Huang, Kevin [1 ]
机构：
[1] Univ South Carolina, Dept Mech Engn, Columbia, SC 29208 USA
来源：
FRONTIERS IN ENERGY RESEARCH | 2021年 / 9卷 / 09期
基金：
美国国家科学基金会;
关键词：
molten carbonate; surface species; Raman spectroscopy; DFT; alkaline earth;
D O I：
10.3389/fenrg.2021.653527
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Here we report the results of a study on active surface species of a pristine and modified (Li-Na)(2)CO3 eutectic using in situ Raman spectroscopy technique. The effects of gas compositions, temperature, time, and alkaline earth have been systematically studied. The species of CO42-, HCO4-, and C2O52- are identified as the three major active species on the surface of (Li-Na)(2)CO3 eutectic by a combined Raman spectroscopy and theoretical density functional theory calculations. The results further reveal that CO42-, HCO4-, and C2O52- are preferably formed in the presence of O-2, H2O, and high CO2 concentration. With the addition of Ba to the pristine (Li-Na)(2)CO3 eutectic, the Raman CO42-/HCO4- shifts become more pronounced.
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页数：7
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