Doctoral theses

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308 Subject(s) of these

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Statut
Ongoing
Published on

Hydrogen storage using mixed clathrates in porous media

With the growing attractiveness of hydrogen (H2) as a fuel source for tomorrow's mobility, the issue of H2 storage will become central, especially for the medium size storage as for example in gas station for vehicles. The unique density and diffusivity properties of H2 at ambient conditions make storage very difficult.

Physical Sciences and Physico-chemistry Earth Sciences and Environmental Technologies Rueil-Malmaison
Ongoing
Published on

Hydrogen assisted recycling of polyolefins on acid/metallic bifunctional catalysts

Plastic recycling is gaining more and more attraction, not only to find a solution to fossil resources depletion, but also to prevent plastics from damaging environment and to limit health issues. As IFPEN intends to be a major actor of low carbon footprint circular economy, R&D work on plastic recycling is ongoing.

Chemical Sciences Catalysis, Biocatalysis and Separation Lyon
Ongoing
Published on

Mixed accuracies for preconditioned iterative methods applied to sparse systems

Currently, most numerical simulations performed at IFPEN are carried out in double precision. However, computing in mixed or reduced precision allows an acceleration of the execution, a decrease in energy consumption, and optimal use of the memory. 

Computer and Information Science Digital Science and Technology Rueil-Malmaison
Ongoing
Published on

Development and experimental test of data-driven approaches for physics-informed wind-turbine digital twins

In a context of energy crisis, health monitoring of wind turbines is a major economic issue. This monitoring allows costs to be reduced by anticipating maintenance operations and optimising operating time. Classical approaches propose to exploit the measurements of a few sensors placed on the wind turbine.

Mathematics Applied Physico-chemistry and Mechanics Rueil-Malmaison
Ongoing
Published on

Use of co-cultures to improve Clostridium acetobutylicum fermentation

Through various research programs, IFP Energies nouvelles is strongly involved in the development of bioprocesses to produce biofuels and bio-based chemical intermediates. In particular, the Biotechnology department focuses on biological pathways trough the use of micro-organisms, such as Clostridium acetobutylicum.

Biosciences and Biotechnologies Catalysis, Biocatalysis and Separation Rueil-Malmaison
Ongoing
Published on

Improvement of the safety of Li-ion batteries subjected to fast/cold charge constraints

The Li-ion battery is the technology selected by all car manufacturers to provide the energy storage required for electrified vehicle deployment. A battery, during its lifecycle, can encounter a wide range of operating conditions. Some of those operating conditions can accelerate battery degradation and can lead to safety issues.

Physical Sciences and Physico-chemistry Applied Physico-chemistry and Mechanics Lyon
Ongoing
Published on

Mechanistic and kinetic study of the formation of humins and their precursors during fructose dehydration

The PhD project is proposed in the context of the transformation of sugars into fine chemicals, more specifically fructose into platform molecules for the chemical industry. The goal of the project is to understand and rationalize the reaction mechanisms of sugars by combined experimental and theoretical approaches.

Chemical Sciences Process Design and Modeling Lyon
Ongoing
Published on

Etude de la désactivation de la réaction de déshydrogénation de l’éthanol

Catalyst deactivation is the loss of catalytic activity and/or selectivity with time. This is a major and recurring problem in industrial-scale processes. Catalyst deactivation is unavoidable and has a major impact on the reactor technology used and therefore on the process design.

Chemical Sciences Process Design and Modeling Lyon
Ongoing
Published on

Interactions entre les parcs éoliens et la stratification stable de l’atmosphère : impacts sur la zone d’inversion et la surface

Since 2016, a partnership was initiated between IFP Energies Nouvelles and the Centre National de Recherche en Météorologie (CNRM – Météo France), to study the interactions between wind turbines and the Atmospheric Boundary Layer (ABL).

Physical Sciences and Physico-chemistry Applied Physico-chemistry and Mechanics Rueil-Malmaison