Name
Chemical-looping combustion in packed-fluidized bed reactor: Experimental and modeling investigation into the effect of random metal packings
Date & Time
Tuesday, October 1, 2024, 11:40 AM - 12:00 PM
Description

Chemical-Looping-Combustion (CLC) presents a promising technology for heat and power generation while concurrently facilitating CO2 capture. It prevents the mixing of flue gases with air, eliminating the need for post-combustion gas separation. However, a key challenge with CLC lies in ensuring sufficiently high gas-solid mass transfer in the fuel reactor, to achieve the highest possible fuel conversion and avoid expensive oxy-polishing stage. This study investigates the impact of random metal packings such as RMSR on fuel conversion and mass transfer in a bubbling bed fuel reactor. This packing has a void factor >90% and have only a limited impact on pressure drop and solid flux, while physically preventing bubble growth and slugging. CLC experiments are conducted in a stainless-steel reactor with I.D. of 7.8 cm with gaseous fuels, such as syngas and carbon monoxide. Findings indicate that RMSR packings exhibit a noteworthy enhancement in syngas conversion, reaching 1.0 at 840°C, thereby suggesting their potential to facilitate complete fuel conversion and obviate the necessity for post-combustion oxy-polishing. To study involved phenomena further, cold-flow experiments are performed and a mass-transfer model is introduced to analyze the different mass-transfer steps (intra-particle, particle surface to emulsion gas, and emulsion gas to bubble gas) in the reactor. Model analysis shows that the main resistance for mass transfer occurs across the bubble-emulsion boundary. The incorporation of packings enhances the mass transfer coefficient across this boundary by up to 23% compared to conventional beds, underscoring the ability of packings to improve CLC performance.

Location Name
Max Bell 253
Full Address
Banff Centre for Arts and Creativity
107 Tunnel Mountain Dr
Banff AB T1L 1H5
Canada
Session Type
Oral Presentation
Abstract ID
1002