2 Feb 2024
Job Information
- Organisation/Company
CNRS- Department
Conditions Extrêmes et Matériaux : Haute température et Irradiation- Research Field
Chemistry
Physics
Technology- Researcher Profile
First Stage Researcher (R1)- Country
France- Application Deadline
22 Feb 2024 - 23:59 (UTC)- Type of Contract
Temporary- Job Status
Full-time- Hours Per Week
35- Offer Starting Date
1 Apr 2024- 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
Context
Global warming calls for a drastic reduction in greenhouse gas emissions. In the cement industry, the IMERYS Group is involved in a vast research program to bring about a successful transition to hydrogen. IMERYS Aluminates and Air Liquide, and the LGC Toulouse and CNRS-CEMHTI laboratories in Orléans, are involved in the PRECIZE project, financed by ADEME (the French Environment and Energy Management Agency), dedicated to the development of a demonstrator furnace for the production of aluminous cements, based on hydrogen combustion on the one hand, and on the mineralization of CO2 from the raw materials used on the other. One of the CEMHTI laboratory's activities in this project is to study the feasibility of producing aluminous cement using a pilot furnace equipped with hydrogen-powered burners. The CNRS CEMHTI (Extreme Conditions and Materials : High Temperature and Irradiation) laboratory in Orléans is recruiting a PhD student for 3 years.
The CEMHTI is a CNRS research unit located on two nearby sites (High-Temperature and Cyclotron), with a staff of around 100 collaborators. The laboratory is developing original expertise and tools on a national and international level to study the physico-chemical properties of materials in extreme conditions, particularly in situ.
Within the CEMHTI laboratory, the PhD student will join the CERAM and MatRMag teams, dedicated respectively to the study of innovative glass-ceramics: crystallization, structure and corrosion, and to the study of materials by Nuclear Magnetic Resonance. The PhD student will also collaborate with the project partners and take part in progress meetings at the various partner sites.
Objectives
The aim of the thesis being carried out at CEMHTI, in close collaboration with the project consortium, is to gain a detailed understanding of the clinker solidification path, from the melting of the raw materials to the solidification and crystallization of the expected mineral phases, in the innovative context of a hydrogen-powered furnace. The aim of the thesis is to define the feasibility of the process for obtaining the desired mineral phases. Secondly, the PhD student will characterize the setting and ageing conditions of the clinker produced under these conditions.
Methodology
The PhD student will produce clinker samples at the CEMHTI laboratory on a dedicated atmosphere-controlled furnace. The influence of the parameters: temperature cycle and composition of the working atmosphere, as well as to a lesser extent, the composition and origin of the raw materials, will be analyzed within the framework of a parameterized study. Samples from the conventional production process will be characterized and used as a reference. In addition, the PhD student will have at his disposal samples from the hydrogen pilot furnace, which are more representative of the process. These samples will be studied using a wide range of techniques: thermal analysis (ATG, DSC), temperature X-ray diffraction, spectroscopies adapted to high temperatures (solid and liquid Nuclear Magnetic Resonance, solid and liquid Raman), microscopy (Scanning Electron Microscope, Transmission Electron Microscope, Confocal Microscope) and ion beam analysis (Rutherford Back Scattering - Elastic Recoil Detection Analysis). The combination of these techniques will enable us to report on the evolution of the chemical composition of the phases and characterize the amorphous and crystalline phases of the material, providing information on the chemical environments, in both liquid and solid phases, at key stages in the crystallization process. Hydration and aging of the clinker will also be monitored through targeted analysis of the solid surface.
Deadline for application : 20/02/2024
Parametric study of the production of aluminous cements applied to the optimization of a pilot hydrogen furnace: influence of the nature of the atmosphere and raw materials on clinker quality.
Requirements
- Research Field
- Chemistry
- Education Level
- Master Degree or equivalent
- Research Field
- Physics
- Education Level
- Master Degree or equivalent
- Research Field
- Technology
- Education Level
- Master Degree or equivalent
- Languages
- FRENCH
- Level
- Basic
- Research Field
- Chemistry
- Years of Research Experience
- None
- Research Field
- Physics
- Years of Research Experience
- None
- Research Field
- Technology
- Years of Research Experience
- None
Additional Information
Additional comments
Expected skills:
Master's degree or engineering diploma in materials science, with a background in material physics or physical chemistry.
Knowledge of the structure and microstructure of crystalline and amorphous oxides, with experience in elaboration.
Knowledge of thermal analysis techniques, microscopy, solid state NMR and vibrational spectroscopy (IR, Raman).
Basic knowledge of phase diagrams, diffusion mechanisms, ceramics and sintering, crystallization, reaction kinetics.
Expected qualities :
1) A taste for experimentation
2) Rigor and care in experimentation and data processing
3) Ability to work independently
4) Ability to analyze and synthesize, to communicate, to work as part of a team
5) Fluency in English (read, written and spoken)
6) Project management, work planning
7) French/English writing and speaking skills
Please include transcripts for both years of the Master's program in your CV, as well as any other relevant documents such as letters of recommendation.
- Website for additional job details
https://emploi.cnrs.fr/Offres/Doctorant/UPR3079-NADPEL-004/Default.aspx
Work Location(s)
- Number of offers available
- 1
- Company/Institute
- Conditions Extrêmes et Matériaux : Haute température et Irradiation
- Country
- France
- City
- ORLEANS
- Geofield
Where to apply
- Website
https://emploi.cnrs.fr/Candidat/Offre/UPR3079-NADPEL-004/Candidater.aspx
Contact
- City
ORLEANS- Website
http://www.cemhti.cnrs-orleans.fr
STATUS: EXPIRED