Development of process to remove oligomers and suppress their formation in aging fuels by adsorbing the precursors of their aging procedure using adsorbents

  • The research described in this dissertation focuses on developing a process to remove oligomers and suppress their formation by intercepting the aging procedure's precursors using adsorbents when biodiesel and its blends are used as fuel. So far, there has been no attempt to cause the stabilization of biodiesel and its blends using adsorbents from open literature. This investigation is one of the first studies on the use of adsorbents to mitigate biodiesel and diesel fuel's stability behavior–biodiesel blends and the removal of oligomers or suppressing the formation of high molecular mass species in aging oil. This study's primary aim has been achieved by several experimental measurements that provided results on adsorbents' effecton fuel oxidative stability, especially ester-based fuel like biodiesel and its blends. The chemical composition and some critical rheological analyses of the samples have been measured to understand their role in the oxidation of the sample by comparing the presence and absence of the adsorbents during the aging process. Furthermore, it aims to use adsorbents to suppress oligomers' formation and remove them in aging oil due to the influence of biodiesel and its blends. The research project also seeks to stabilize fuel, especially ester-based fuel like biodiesel, and its blends using the adsorbents. The adsorbents' application will enhance biodiesel's oxidative stability and its blends during long-term storage or application, focusing on its use in plug-in hybrid vehicles, emergency power plants,and generators. The combustion engine only starts in plug-in hybrid vehicles if the battery cannot supply energy on longer journeys. As a result, the fuel remains longer in plug-in hybrid vehicles. Fuels that are exposed to heat and oxygen over anextendedperiod can form aging products. These aging products lead to the formation of deposits, especially in the case of diesel fuels mixed with biodiesel content,and can, therefore, endanger the operational safety of the vehicle in critical components such as injectors or filter units.

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Author:Jerome Desire Aliebakaa KpanORCiDGND
Advisor:Wolfgang K. L. Ruck (Prof. Dr. Ing.)
Referee:Wolfgang K. L. Ruck (Prof. Dr. Ing.)ORCiDGND, Jürgen Krahl (Prof. Dr.)ORCiDGND, Oliver Opel (Prof. Dr.)ORCiDGND
Document Type:Doctoral Thesis
Year of Completion:2023
Date of Publication (online):2023/10/13
Date of first Publication:2023/10/13
Publishing Institution:Leuphana Universität Lüneburg, Universitätsbibliothek der Leuphana Universität Lüneburg
Granting Institution:Leuphana Universität Lüneburg
Date of final exam:2023/08/23
Release Date:2023/10/13
Institutes:Fakultät Nachhaltigkeit
Fakultät Nachhaltigkeit / Institut für Nachhaltige Chemie (INSC)
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 54 Chemie / 547 Organische Chemie
Licence (German):License LogoDeutsches Urheberrecht