Beijing, China
En recherche d'emploi (Docteur/Ingénieur modélisation R&D en génie des procédés chimiques)
• Project FLOPTIM of Institute Carnot Icéel - 3D numerical simulation of redox flow battery (RFB) for porous electrode structure optimization: 1. 3D electrode design by modifying geometry or adding channels to improve electrolyte mixing towards membrane 2. Electrolyte fluid flow simulation in both porous and non-porous media by Darcy's law and Brinkman equation 3. 3D numerical modelling by coupling fluid flow, species transport and electrochemistry (battery dynamic charge and discharge, polarization curve) 4. Battery performance comparison of simulation results between uniform porous electrode and modified ones, comparison between simulation and experiments carried out at CNRS-LCPME, towards electrode structure optimization • Project Stock'NRJ financed by European Regional Development Fund - Numerical modelling of redox flow battery (RFB): 1. Dynamic numerical modelling of redox flow battery at engineering scale by using COMSOL Multiphysics, simulations of battery charge/discharge cycle, polarization curve through a coupling of species transport, electrochemistry and electrolyte external circulation between their tanks and cell 2. Qualitative comparison between simulation and measurements, analysis of essential parameters and operational conditions, their effects on heterogenous behaviors inside a segmented RFB cell 3. Limit current phenomenon analysis by simulating a symmetric RFB cell 4. A general tank modelling for fluid mixing effects on electrolyte utilization of RFB, by combining the continuous stirred-tank reactor and the plug flow model • Collaboration with Kemiwatt Company: 1. RFB numerical simulation results compared to the company's data 2. 3D CFD simulations of the company industrial tanks for fluid mixing analysis • 2 scientific articles, presentation in the 2021 annual CNRS RFB research group (GdR) conference, presentation in 2021 on-line Prague Flow Battery seminar, technical reports and regular meetings
• Design and development of high-pressure systems for supercritical CO2 cleaning processes: 1. Piping and instrumentation diagram (P&ID), mass and energy balances, dimensioning of main components (reactors, heat exchangers, pumps, separators, decanters, etc.), security risk assessment 2. Industrial system installation, high-pressure piping (Swagelok stainless steel piping and relevant union, fitting etc.), multilayer pipe for atmospheric pressure heat exchange pipeline, equipment repair and maintenance in the workshop • After sales service - System modification in client site for machine internal cleaning maintenance
• Thesis: Supercritical Antisolvent (SAS) Process Intensification through the use of High Pressure (HP) Microfluidic Mixing (ANR project SUPERFON: https://anr.fr/Project-ANR-17-CE07-0029) • Modelling approaches: 1. 3D CFD simulation by applying a home-made open source code "Notus-CFD", code integration of fluid mixture thermodynamics, calculation of local energy dissipation rate for turbulent mixing 2. HP CO2 and ethanol laminar mixing simulations, validation by experimental data 3. Direct numerical simulation (DNS) of supercritical CO2 and ethanol turbulent mixing through massively parallel and high performance computing 4. Micromixing time calculation based on first order system of species distribution along the microchannel, compared to other theories, mixing intensification 5. Nanoparticles formation simulation by implementing the standard method of moments (SMOM) and population balance into the CFD code • Experimental studies: 1. Microreactor design and microfabrication in clean room for silicon-pyrex type microreactors, with high-pressure resistance (150 bar) inside the microchannels 2. In-situ high-pressure experimental set-up, including high-speed camera, microscope and micro Particle Image Velocimetry (PIV) 3. Steady state velocity field measurement by micro PIV for a microfluidic laminar mixing of CO2 and ethanol 4. Observation of HP CO2 and ethanol microfluidic turbulent mixing (Re > 7000) • Other studies: two-phase HP microfluidic mixing of CO2 and water 1. Microreactor design and system set-up with HP transparent silica capillary for a coflow fluid configuration 2. In-situ measurements to determine different inertia-driven mixing regimes 3. Regime determination by jet and droplet properties, and eventually by inertial, viscous and interfacial forces of both fluids, confirmed by CFD simulation based on volume of fluid (VOF) method • 4 published scientific articles, PhD thesis, presentations and poster, technical reports and regular group meetings
• Following the internship, the hydrocracking process model validation and parameters determination by real data from laboratory, pilot and industrial plant • Analysis of feed quality effects on the model parameters • Internal and external communications, meetings and reports
• Optimization of an existing model of deasphalting process and data analysis by principal component analysis (PCA) and partial least squares (PLS) regression • Numerical modelling of hydrocracking process by coupling a multiple lump approach, reaction kinetics and statistical parameters of true boiling point (TBP) curve • Internship report & project defense