Extremely Stable and Durable Mixed Fe–Mn Oxides Supported on ZrO<sub>2</sub> for Practical Utilization in CLOU and CLC Processes
This paper contains the results of research on a promising combustion technology known as chemical looping combustion (CLC) and chemical looping with oxygen uncoupling (CLOU). The remarkable advantages of CLC are, among others, that concentrated CO<sub>2</sub> stream can be obtained afte...
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| Autores principales: | , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
MDPI AG
2021
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/5b2cb371e2e149ac85715da7974b17b7 |
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| Sumario: | This paper contains the results of research on a promising combustion technology known as chemical looping combustion (CLC) and chemical looping with oxygen uncoupling (CLOU). The remarkable advantages of CLC are, among others, that concentrated CO<sub>2</sub> stream can be obtained after water condensation without any energy penalty for its separation or significant decrease of NO<sub>x</sub> emissions. The objective of this work was to prepare a novel bi-metallic Fe–Mn supported on ZrO<sub>2</sub> oxygen carriers. Performance of these carriers for the CLOU and CLC process with nitrogen/air and hard coal/air was evaluated. One-cycle CLC tests were conducted with supported Fe–Mn oxygen carriers in thermogravimetric analyzer utilizing hard coal as a fuel. The effects of the oxygen carrier chemical composition and process temperature on the reaction rates were determined. Our study proved that for CLOU, properties formation of bixbyite and spinel forms are responsible. Among iron ferrites, we concluded that iron-rich compounds such as Fe<sub>2</sub>MnO<sub>4</sub> over FeMn<sub>2</sub>O<sub>4</sub> spinel type oxides are more effective for CLOU applications. |
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