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    Implications of feeding or cofeeding bio-oil in the fluid catalytic cracker (FCC) in terms of regeneration kinetics and energy balance

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    Accepted manuscript
    Embargo End Date:
    2022-08-04
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    Type
    Article
    Authors
    Ochoa, Aitor
    Vicente, Héctor
    Sierra, Irene
    Arandes, José M.
    Castaño, Pedro cc
    KAUST Department
    Physical Science and Engineering (PSE) Division
    Date
    2020-07-27
    Online Publication Date
    2020-07-27
    Print Publication Date
    2020-10
    Embargo End Date
    2022-08-04
    Submitted Date
    2020-06-02
    Permanent link to this record
    http://hdl.handle.net/10754/664564
    
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    Abstract
    Feeding or cofeeding bio-oil (biomass pyrolysis oil) into the fluid catalytic cracking (FCC) has a direct impact on product distribution, reaction kinetics and deactivation of this key catalytic valorization strategy. In this work, we have analysed the impact in terms of the catalyst regeneration kinetics and energy balance of the unit. These factors are linked to the holistic viability of revamped refineries turned into biorefineries. Deactivated catalysts were obtained in FCC experiments using vacuum gasoil and raw bio-oil. The regeneration kinetics of coke combustion were analysed in a thermobalance, whereas the heats dissipated throughout the combustion (high heating values) were analysed in a calorimeter. Overall, the regenerator does not require major design amendments to treat bio-oil. We found a linear correlation between the higher heating value of the reactants and the coke produced, which enables to predict possible scenarios in the FCC unit. When incorporating higher amounts of bio-oil, the heat balance of the unit changes significantly: the temperature in the regenerator rises up to +36 K, requiring significant energy input for heating the bio-oil but offering the chance to recover more (electrical) energy when the proportion of bio-oil is greater than ca. 50%.
    Citation
    Ochoa, A., Vicente, H., Sierra, I., Arandes, J. M., & Castaño, P. (2020). Implications of feeding or cofeeding bio-oil in the fluid catalytic cracker (FCC) in terms of regeneration kinetics and energy balance. Energy, 209, 118467. doi:10.1016/j.energy.2020.118467
    Sponsors
    This work was carried out with the support of the Ministry of Economy and Competitiveness of the Spanish Government, some cofounded with ERDF funds (CTQ2016-79646-P and RTI2018-096981-B-I00) and the Basque Government (IT748-13 and IT912-16). A. Ochoa is grateful for his predoctoral grant from the Department of Education, Language Policy and Culture of the Basque Government (PRE_2016_2_0129).
    Publisher
    Elsevier BV
    Journal
    Energy
    DOI
    10.1016/j.energy.2020.118467
    Additional Links
    https://linkinghub.elsevier.com/retrieve/pii/S0360544220315759
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.energy.2020.118467
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division

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