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

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

Authors

DR FATIH GULEC FATIH.GULEC1@NOTTINGHAM.AC.UK
Assistant Professor in Chemical and Environmental Engineering

COLIN SNAPE COLIN.SNAPE@NOTTINGHAM.AC.UK
Professor of Chemical Technology & Chemical Eng



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 BV
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.