Name
Chemical looping with integrated CO2 capture and methanation in fluidized bed reactors using highly performing dual function materials
Date & Time
Wednesday, October 2, 2024, 9:00 AM - 9:40 AM
Description

A chemical looping strategy to perform Integrated CO2 Capture and Methanation (ICCM) was proposed in a configuration based on two interconnected fluidized beds, where dual function materials (DFMs), combining both sorbent and catalytic properties to capture and convert CO2 from flue gas into CH4, are continuously recirculated. In this work, we tested two highly performing DFMs, Lithium-Ruthenium/Al2O3 and Na-Ruthenium/ Al2O3, investigating the temperature effect on the CO2 capture and on the methanation phases, and the performance stability over 5 repeated cycles. The experiments were carried out in a batch lab-scale system, conceived with the aim of studying looping processes, consisting of two fluidized beds connected by a duct enabling the fast transfer of solids. Specifically, carbonation was carried out in one reactor at 200-400 °C, while methanation in 4% H2 was carried out in the other reactor at 230-300 °C. Both DFMs showed quite stable performance over the cycles. The highest methane yield occurred at the highest methanation temperature (300°C) due to kinetic constraints, to which Na-Ru/Al2O3 was especially subjected. The highly performing Li-based DFM showed a nearly 100% yield at the highest temperatures. Despite some experimental procedure limitation relevant at the lower carbonation temperature (200 °C), the study highlights the possibility of a large potential intensification. In particular, the physical separation of the CO2 capture and methanation phases would allow to optimize each single step in terms of operating parameters, as well as to split the high exothermicity of the whole process.

Location Name
Max Bell 252
Full Address
Banff Centre for Arts and Creativity
107 Tunnel Mountain Dr
Banff AB T1L 1H5
Canada
Session Type
Invited Talk
Abstract ID
1012