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Contribution à l'étude de l'influence des biocarburants et de leurs propriétés sur le fonctionnement des moteurs à combustion interne

Abstract : Global warming, mainly due to greenhouse gases, and the increasing of global demand for fossil fuels and their rapid depletion, represent strong environmental and economic challenges, which have prompted the global community to turn to alternative and renewable energy. This thesis falls within this perspective of developing renewable energies. The research work can be summed up in two main areas,where the first includes the development of the process of continuous biodiesel production with different raw materials through two reactions (transesterification and esterification). This axis consists of a simulation under ANSYS Fluent of the flow of fluids inside a chaotic mixer, a synthesis and purification of biodiesel, a kinetic study of the biodiesel production system, followed by an investigation on the effects of operating conditions on biodiesel’s yield and properties. The results obtained showed the effectiveness of this process in intensifying the continuous production of biodiesel. The second axis was devoted to the study of the effect of the physicochemical properties of biodiesels on the internal combustion engine operation. In this part, several biodiesels having a wide range of physicochemical characteristics were used in a direct injection (DI) and naturally aspirated diesel engine, with a rated electric power of 30.4 kW at 1500 rpm. Engine performance (specific consumption, efficiency) and pollutant emissions (unburnt hydrocarbons, NOx, CO2, CO, PM) were studied for the various biodiesels, used alone or as a mixture. The results showed a small deviation between the various biodiesels tested in the engine with the exception of HC and particulate emissions.
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Submitted on : Friday, December 3, 2021 - 1:02:20 AM
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  • HAL Id : tel-03464121, version 1

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Mohamed El Amine Kadi. Contribution à l'étude de l'influence des biocarburants et de leurs propriétés sur le fonctionnement des moteurs à combustion interne. Génie des procédés. Ecole nationale supérieure Mines-Télécom Atlantique, 2020. Français. ⟨NNT : 2020IMTA0207⟩. ⟨tel-03464121⟩

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