CO2 capture from fluid catalytic crackers via chemical looping combustion: Regeneration of coked catalysts with oxygen carriers

Güleç, Fatih; Meredith, Will; Snape, Colin E.

Abstract

Oil refineries are responsible for ∼5% of total global CO2 emissions and approximately 25–35% of these emissions are released from a single unit called Fluid Catalytic Cracking (FCC). Chemical Looping Combustion (CLC) has been recently proposed as a novel CO2 capture method from the regenerator of FCC units as an integrated process of CLC-FCC. In this study, for the first time, the combustion behaviour of three types of cokes, a model FCC coke (which is a low volatile semi-anthracite coal), and cokes deposited on commercial FCC catalysts by n-hexadecane cracking and Vacuum Gas Oil, were comprehensively investigated with oxygen carriers (Co3O4, CuO, and Mn2O3) in a fixed-bed reactor at 700–850 °C. The results demonstrate that a high coke combustion efficiency was achieved with CuO (98 vol %), Co3O4 (91 vol %), and Mn2O3 (91 vol %) at 800 °C for 30 min. CuO was the most effective oxygen carrier, at temperatures greater than 750 °C for 45 min of residence time. These are the regeneration conditions used in the conventional FCC regenerators.

Citation

Güleç, F., Meredith, W., & Snape, C. E. (2023). CO2 capture from fluid catalytic crackers via chemical looping combustion: Regeneration of coked catalysts with oxygen carriers. Journal of the Energy Institute, 107, Article 101187. https://doi.org/10.1016/j.joei.2023.101187

• Journal Article Type: Article
• Acceptance Date: Jan 13, 2023
• Online Publication Date: Jan 14, 2023
• Publication Date: Apr 1, 2023
• Deposit Date: Feb 9, 2023
• Publicly Available Date: Feb 10, 2023
• Journal: Journal of the Energy Institute
• Print ISSN: 1743-9671
• Electronic ISSN: 1746-0220
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 107
• Article Number: 101187
• DOI: https://doi.org/10.1016/j.joei.2023.101187
• Keywords: Chemical looping combustion, Advanced combustion, Fluid catalytic cracking, CO2 capture, Oxygen carrier
• Public URL: https://nottingham-repository.worktribe.com/output/16162172
• Publisher URL: https://www.sciencedirect.com/science/article/pii/S1743967123000168?via%3Dihub
• Additional Information: This article is maintained by: Elsevier; Article Title: CO2 capture from fluid catalytic crackers via chemical looping combustion: Regeneration of coked catalysts with oxygen carriers; Journal Title: Journal of the Energy Institute; CrossRef DOI link to publisher maintained version: https://doi.org/10.1016/j.joei.2023.101187; Content Type: article; Copyright: © 2023 The Authors. Published by Elsevier Ltd on behalf of Energy Institute.