PhD position: Elaboration of 3D electrodes by additive manufacturing: numerical optimization and application to the electrosynthesis of ammonia

Université Toulouse III - Paul Sabatier

vacanciesin.eu


9 Feb 2024
Job Information

Organisation/Company
Université Toulouse III – Paul Sabatier
Research Field
Engineering » Chemical engineering
Researcher Profile
First Stage Researcher (R1)
Country
France
Application Deadline
24 Apr 2024 – 18:00 (Europe/Paris)
Type of Contract
Temporary
Job Status
Full-time
Is the job funded through the EU Research Framework Programme?
Not funded by an EU programme
Is the Job related to staff position within a Research Infrastructure?
No

Offer Description

Duration: 3 years (start: October 1, 2024)
Funding: Université Toulouse 3, Paul Sabatier, FRANCE
Doctoral school: Mechanics, Energetics, Civil & Process Engineering, MEGEP
Lab: Laboratoire de Génie Chimique, LGC
Keywords: hydrodynamics, mass transfer, electrochemistry, modeling, additive manufacturing, electrosynthesis I electrification, energy, environment, decarbonisation, hydrogen

Electrochemical reactors play a key role in several areas such as i) the production and recycling of raw materials (electrosynthesis, chlor-alkali, H2 , metals, etc.), ii) environmental protection (degradation of pollutant compounds, carbon-free processes, CO2 recovery, etc.) and iii) energy transformation and storage (fuel cells, redox flow batteries). They are also crucial for the development of carbon-free solutions based on electrification (renewable energy storage, electrosynthesis). New electrochemical applications in these areas (contributing to achieving carbon neutrality in 2050 [1]) require optimal and rapid design of efficient electrochemical reactors. In this context, this thesis aims to implement Additive Manufacturing (AM) for the development of new electrodes of the reactor. The full geometry control offered by AM allows the production of 3D/porous electrodes with complex shapes, which are not achievable by conventional manufacturing methods, and which lead to greatly improved electrochemical (mass flux/current and selectivity/potential distribution) and hydraulics (resistance to flow) performances. As the structure is numerically designed, it is possible to simulate the flow, and the transfers of mass and charges, through a 3D electrode produced by AM. This opens the way to the numerical optimization of the structure of the electrodes in order to design and produce more quickly an electrochemical reactor adapted, optimized and selective for a given application; thus avoiding the long and costly experimental optimization phase. AM represents a paradigm shift from the “classic” development of electrodes. However, no optimization method has yet been developed. In addition, the contribution of 3D electrodes produced by AM has not yet been evaluated and exploited for electrochemical applications of current interest.

In this context, the main objectives of this thesis are:

–  Develop a method to numerically optimize the structure of 3D electrodes: selection and implementation of a numerical simulation of the flow and potential/current distribution taking into account electrochemical kinetics and mass transfer (direct CFD simulation, continuous effective model, porous medium), optimization

–  Experimental validation of the performance of numerically optimized 3D electrodes: production of 3D electrodes by metallic AM LPBF (Laser Powder Bed Fusion), determination of AM parameters, electrochemical measurements on a filter-press reactor integrating the electrodes (voltammetry, electrolysis, measurement of the limiting current, etc.)

–  Application to the electrosynthesis of ammonia NH3 which is considered today as a way to store hydrogen and whose production, without using H2 of fossil origin (alternative to the Haber-Bosch process), is an important topic of decarbonisation: use of the 3D electrodes produced by AM to enhance the flux and the yield of NH3 production (electrolysis, chemical analysis, NH3 dosage).

This research work will be carried out at Laboratoire de Génie Chimique (LGC) in the Electre team of the Electrochemical Processes department. The Electre team specializes in the design, modeling and implementation of electrochemical reactors and microreactors (electrosynthesis, depollution, redox flow batteries). The LGC has all the required analytical and numerical resources. During this project, the Electre team will collaborate with Laboratoire d’Études des Microstructures et de Mécanique des Matériaux (LEM3) in Metz (France) for aspects related to the metallic AM of the electrodes.

[1] IEA (2021), Net Zero by 2050, IEA, Paris https://www.iea.org/reports/net-zero-by-2050

 

About the application

Send CV, cover letter, transcripts and diplomas, name and contact information of two referees

 

 

Requirements

Research Field
Engineering » Chemical engineering
Education Level
Master Degree or equivalent

Research Field
Engineering » Mechanical engineering
Education Level
Master Degree or equivalent

Skills/Qualifications

Profile: Academic training (Master degree) in chemical engineering/process engineering, or in fluid mechanics and transfers (mechanical engineering), ideally with basic knowledge in electrochemistry.

Specific Requirements

Fluency in french appreciated but not required

Languages
ENGLISH
Level
Excellent

Additional Information
Work Location(s)

Number of offers available
1
Company/Institute
Université Toulouse 3 – Paul Sabatier, Laboratoire de Génie Chimique
Country
France
City
Toulouse
Geofield

Where to apply

E-mail
[email protected]

Contact

City
Toulouse
Website
http://www.univ-tlse3.fr/
https://lgc.cnrs.fr/en/
https://ed-megep.univ-toulouse.fr/as/ed/actu.pl?site=megep
Street
118 route de Narbonne
Postal Code
31062

STATUS: EXPIRED

View or Apply
To help us track our recruitment effort, please indicate in your cover//motivation letter where (vacanciesin.eu) you saw this job posting.

Job Location