Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.14279/29818
Title: Selective catalytic deoxygenation of palm oil to produce green diesel over Ni catalysts supported on ZrO2 and CeO2–ZrO2: Experimental and process simulation modelling studies
Authors: Tsiotsias, Anastasios I. 
Hafeez, Sanaa 
Charisiou, Nikolaos D. 
Al-Salem, Sultan M. 
Manos, George 
Constantinou, Achilleas 
Alkhoori, Sara 
Sebastian, Victor 
Hinder, Steven J. 
Baker, Mark A. 
Polychronopoulou, Kyriaki 
Goula, Maria A. 
Major Field of Science: Engineering and Technology
Field Category: Chemical Engineering
Keywords: Ceria-zirconia;Computational fluid dynamics;Green diesel;Process modelling;Selective deoxygenation
Issue Date: 1-Apr-2023
Source: Renewable Energy, 2023, vol. 206, pp. 582 - 596
Volume: 206
Abstract: The selective deoxygenation of palm oil to produce green diesel has been investigated over Ni catalysts supported on ZrO2 (Ni/Zr) and CeO2–ZrO2 (Ni/CeZr) supports. The modification of the support with CeO2 acted to improve the Ni dispersion and oxygen lability of the catalyst, while reducing the overall surface acidity. The Ni/CeZr catalyst exhibited higher triglyceride (TG) conversion and yield for the desirable C15–C18 hydrocarbons, as well as improved stability compared to the unmodified Ni/Zr catalyst, with TG conversion and C15–C18 yield remaining above 85% and 80% respectively during 20 h of continuous operation at 300 oC. The high C17 yields also revealed the dominance of the deCOx (decarbonylation/decarboxylation) pathway. A fully comprehensive process simulation model has been developed to validate the experimental findings in this study, and a very good validation with the experimental data has been demonstrated. The model was then further utilised to investigate the effects of temperature, H2 partial pressure, H2/oil feed ratio and LHSV. The model predicted that maximum triglyceride conversion was attainable at reaction conditions of 300 °C temperature, 30 bar H2 partial pressure, H2/oil of 1000 cm3/cm3 feed ratio and 1.2 h−1 LHSV.
URI: https://hdl.handle.net/20.500.14279/29818
ISSN: 09601481
DOI: 10.1016/j.renene.2023.02.038
Rights: © Elsevier Ltd
Type: Article
Affiliation : University of Western Macedonia 
Queen Mary University of London 
Kuwait Institute for Scientific Research 
University College London 
Cyprus University of Technology 
Khalifa University of Science and Technology 
Universidad de Zaragoza 
Networking Research Center on Bioengineering 
University of Surrey 
Publication Type: Peer Reviewed
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