Direct and continuous conversion of flue gas CO₂ into green fuels using dual function materials in a circulating fluidized bed system

Direct and continuous conversion of flue gas CO₂ into green fuels using dual function materials in a circulating fluidized bed system

Kosaka, Fumihiko (National Institute of Advanced Industrial Science and Technology (AIST))
Sasayama, Tomone (National Institute of Advanced Industrial Science and Technology (AIST))
Liu, Yanyong (National Institute of Advanced Industrial Science and Technology (AIST))
Chen, S. (National Institute of Advanced Industrial Science and Technology (AIST))
Mochizuki, Takehisa (National Institute of Advanced Industrial Science and Technology (AIST))
Matsuoka, Koichi (National Institute of Advanced Industrial Science and Technology (AIST))
Urakawa, A. (TU Delft ChemE/Catalysis Engineering)
Kuramoto, Koji (National Institute of Advanced Industrial Science and Technology (AIST))

2022

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.

CO capture
CO hydrogenation
CO utilization
Dual function material
Fluidized bed
Methanation

http://resolver.tudelft.nl/uuid:69e57fff-6f7e-40e2-abd9-13e50c76657b

https://doi.org/10.1016/j.cej.2022.138055

2023-07-01

1385-8947

Chemical Engineering Journal, 450

Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

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journal article

© 2022 Fumihiko Kosaka, Tomone Sasayama, Yanyong Liu, S. Chen, Takehisa Mochizuki, Koichi Matsuoka, A. Urakawa, Koji Kuramoto