Description du sujet de thèse

The aim of the thesis work is to model, simulate and optimize a process for capturing CO₂ by absorption-desorption loop using physical solvents and making it possible to treat gaseous effluents at low pressure. The modelling of flows and transfers within HFMCs will make it possible to identify an optimal geometry and operating conditions for the absorption and regeneration stages, as well as for different solvents. The technological change aims to significantly reduce the energy cost of capture, compared with conventional technology using reactive absorption in a packed column.
The ultimate goal is to identify the optimal design of hollow-fiber membrane contactors (countercurrent or crosscurrent) adapted to new solvents and membrane materials for CO₂ capture and solvent regeneration. Initially, optimization of transfer performance, pressure drop and feasibility will be carried out considering conventional solvents (Water, Selexol). In order to validate the theoretical study, an experimental study will be carried out in a dedicated pilot plant. Secondly, the study will be extended to the new solvents and membranes that will be developed as part of the project. The overall process configuration will be optimized using energy optimization and life cycle analysis approaches.

The thesis is funded by the CNRS through a contract with the ANR (Agence nationale de la recherche). The thesis is part of the IMOSYCCA (Intensified Modular Systems for friendly CO2 capture) project (2023-2029), which is part of the PEPR (Programmes et équipements prioritaires de recherche) SPLEEN (Support innovation to develoP new Largely carbon-frEE iNdustrial processes). Research will be carried out in collaboration with LCPM (Laboratoire de Chimie-Physique Macromoléculaire) in Nancy, LGC (Laboratoire de Génie Chimique) and LCA (Laboratoire de Chimie Agro-industrielle) in Toulouse, and IFPEN (Institut Français du Pétrole Énergies Nouvelles) in Solaize.

Contexte de travail

The thesis will be carried out at the Laboratoire réactions et génie des procédés, LRGP, a joint research unit of the CNRS and the Université de Lorraine, UMR 7274. The laboratory is located in the historic center of Nancy, on the site of the École nationale supérieure des industries chimiques, ENSIC (1 Rue Grandville, Nancy, France). The unit employs over 300 people, and is one of France's largest laboratories in the field of process engineering. The laboratory is located in the historic center of Nancy, on the site of the École nationale supérieure des industries chimiques, ENSIC. The PhD student will be attached to the Separation, Transfer, Reaction, Energy and Matter (STREAM) team of the Processes, Intensification, Membranes, Optimization (PRIMO) research axis. The team has expertise in membrane processes, combining skills in materials implementation with skills in process simulation.

Le poste se situe dans un secteur relevant de la protection du potentiel scientifique et technique (PPST), et nécessite donc, conformément à la réglementation, que votre arrivée soit autorisée par l'autorité compétente du MESR.