| Autor: |
Fumihiko Kosaka, Tomone Sasayama, Yanyong Liu, Shih-Yuan Chen, Takehisa Mochizuki, Koichi Matsuoka, Atsushi Urakawa, Koji Kuramoto |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
Chemical Engineering Journal. 450 |
| ISSN: |
1385-8947 |
| Popis: |
Carbon capture and utilization (CCU) technologies, such as CO2 methanation, generally require energy-intensive CO2 capture and separation processes prior to catalytic CO2 conversion. In contrast, integrated CO2 capture and reduction (CCR) technologies that use dual function materials (DFM) can directly convert low-concentration CO2 in flue gas or atmosphere into high-concentration CH4 or CO. In this study, we demonstrate a circulating fluidized bed (CFB) approach to enable continuous operation of CCR. In the CFB approach, the DFM (Na/Ni/Al2O3) circulates between two bubbling fluidized beds to enable steady-state cyclic operation of (1) selective capture of CO2 in flue gas/air and (2) hydrogenation of the captured CO2. We succeeded in the continuous synthesis of CH4 with high CO2 capture efficiency (>88 %) and high H2 conversion (>85 %) yielding mainly CH4 (selectivity > 99 %) as the product at high concentration (>20 % CH4) using 2 % CO2/N2 as the model flue gas. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect