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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 |
Appears in Collections: | Άρθρα/Articles |
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