Moving packed beds for cryogenic CO2 capture: analysis of packing material and bed precooling

Cann, David; Font-Palma, Carolina; Willson, Paul

Abstract

This work expands upon previous work on a moving bed cryogenic carbon capture (CCC). Cryogenic carbon capture using a fixed packed bed captures CO2 frost deposited on the surface of the bed material; this build-up of frost fouls the heat transfer of the capture column and requires periodic shut down of the process to regenerate the bed material and collect CO2 for further storage. Using a moving bed continuously removes frosted bed material from the capture column preventing the excessive build-up of frost and eliminating the need for a regeneration step within the capture column. This paper sets out two objectives in evaluating an experimental moving bed system with a fixed volume of bed material; i) compare two different types of bed material within the capture column, a high-density ceramic and a steel bed material of similar particle sizes, and ii) combine the precooling step and capture step within the cryogenic capture column to allow the cooling of bed material and CO2 frost formation simultaneously. Frost front velocity results for the two different bed materials show 0.78 mm/s for steel bed material and 1.81 mm/s for ceramic bed material. Introducing a vertical gas injector into the capture column for additional cooling during the capture step allowed the capture step to be extended to approximately 5 minutes of continuous CO2 capture.

Citation

Cann, D., Font-Palma, C., & Willson, P. (2021). Moving packed beds for cryogenic CO2 capture: analysis of packing material and bed precooling. Carbon Capture Science & Technology, 1, Article 100017. https://doi.org/10.1016/j.ccst.2021.100017

• Journal Article Type: Article
• Acceptance Date: Nov 23, 2021
• Online Publication Date: Nov 25, 2021
• Publication Date: 2021-12
• Deposit Date: Nov 26, 2021
• Publicly Available Date: Nov 26, 2021
• Journal: Carbon Capture Science and Technology
• Electronic ISSN: 2772-6568
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 1
• Article Number: 100017
• DOI: https://doi.org/10.1016/j.ccst.2021.100017
• Public URL: https://hull-repository.worktribe.com/output/3886495