Analysis of the CO2 Chemisorption in Li5FeO4, a New High Temperature CO2 Captor Material. Effect of the CO2 and O2 Partial Pressures

详细信息    查看全文

• 作者：Hugo A. Lara-García ; Pedro Sanchez-Camacho ; Yuhua Duan ; José Ortiz-Landeros ; Heriberto Pfeiffer
• 刊名：Journal of Physical Chemistry C
• 出版年：2017
• 出版时间：February 16, 2017
• 年：2017
• 卷：121
• 期：6
• 页码：3455-3462
• 全文大小：585K
• ISSN：1932-7455

文摘

Pentalithium ferrite (Li₅FeO₄) was tested as possible CO₂ captor, both by theoretical calculations and experimental measurements. The pristine Li₅FeO₄ compound with orthorhombic structure was synthesized via solid-state reaction and it was structural and microstructurally characterized. Later, sample was heat-treated at temperatures from room temperature to 900 °C under different CO₂ or CO₂–O₂ atmospheres. Li₅FeO₄ exhibits excellent CO₂ chemisorption abilities with a capture capacity about 12.9 mmol/g, which is outstanding in comparison to other previously reported ceramic captors. This material is able to react with CO₂ from 200 °C to approximately 715 °C showing a high kinetic of reaction even at CO₂ partial pressure values as low as 0.2. Additionally, results suggest that oxygen addition does enhance the CO₂ chemisorption on Li₅FeO₄ at temperatures below 700 °C, although oxygen addition seems to favor the desorption process at higher temperatures.