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PhD in material chemistry (H/F)

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Français - Anglais

Date Limite Candidature : lundi 2 novembre 2020

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General information

Reference : UMR7361-JEADAO-001
Workplace : MULHOUSE,MULHOUSE
Date of publication : Monday, October 12, 2020
Scientific Responsible name : Jean DAOU et Gérald Chaplais
Type of Contract : PhD Student contract / Thesis offer
Contract Period : 36 months
Start date of the thesis : 1 January 2021
Proportion of work : Full time
Remuneration : 2 135,00 € gross monthly

Description of the thesis topic

The global annual production of ethene and propene exceeds 200 million tons with these chemicals mostly used to prepare plastics. However, the separation of alkenes such as ethylene and propylene from their respective alkanes (ethane or propane) represent some of the most challenging and certainly the most energy intensive separations currently employed. The above-mentioned alkane/alkene separations are particularly problematic due to the similarity in the physical and chemical properties of the components. The current solution employed for these separations involves over 70 distillation steps at sub-ambient temperature. Bearing in mind the above mentioned global requirement for these alkenes for polymers, any room temperature alternative to the current process represents a game changer in this domain [1]. This project aims by coupling experimental studies and simulation to develop effective and energy-efficient separation processes using microporous materials such as zeolites and MOFs.
The best microporous materials identified by our colleagues in Montpelliers and Nancy using molecular simulation as part of the ANR SAAMM project, will be synthesized initially in powder form with different particle sizes and will be fully characterized. The physicochemical characterizations will relate both to the structure (X-ray diffraction, solid state NMR, etc.) as well as to the morphology and chemical composition (scanning electron microscopy, mapping, EDX, X-ray fluorescence). All these characterizations will be carried out on the technical platforms of IS2M, which are ISO9001 certified.
The syntheses of conventional zeolites and MOFs generally result in powders composed of crystals of the order of a few micrometers. The size of these crystals is generally not detrimental for a large number of industrial applications. Although the use of these adsorbent materials in powder form can be advantageous in applications using fluidized bed processes, it becomes disadvantageous for certain industrial applications such as those in the separation of alkanes from alkenes. The Controlled Porosity Materials (MPC) axis of IS2M has expertise in shaping zeolites in the form of beads [2], pellets [3], films [4] and membranes [5]. The second part of this thesis project will focus on the shaping of the most promising zeolites and MOFs in extrudates or pellets forms of (identified following the separation results performed by our colleagues at MADIREL).

Skills:
- Very motivated, team player.
- Knowledge in solid-state chemistry
- Curiosity, open mindedness, creativity, perseverance, professionalism, responsibility and team spirit are the main personal skills that we are looking for this position.

[1] D. S. Sholl, R. P. Lively, «Seven Chemical Separation to Challenge the World» Nature, vol. 532, p. 435-437, 2016.
[2] G. Rioland, L. Bullot, T. J. Daou, A. Simon-Masseron, G. Chaplais, D. Faye, E. Fiani et J. Patarin, «Elaboration of FAU-type Zeolite Beads with Good Mechanical Performances for Molecular Decontamination» RSC Advances, vol. 6, p. 2470, 2016.
[3] G. Rioland, T. J. Daou, D. Faye et J. Patarin, «New Generation of MFI-type Zeolite Pellets with Very High Mechanical Performance for Space Decontamination» Microporous and Mesoporous Materials, vol. 167, p. 221, 2016.
[4] N. Laudriant, T. J. Daou, G. Arnold, H. Nouali, J. Patarin et D. Faye, «Zeolite hybrid films for space decontamination» Microporous and Mesoporous Materials, vol. 36, p. 172, 2013.
[5] A. Said, L. Limousy, H. Nouali, L. Michelin, J. Halwani, J. Toufaily, T. Hamieh, P. Dutournié et T. J. Daou, «Synthesis of mono and bi-layer MFI zeolite films on macroporous alumina tubular supports: application to nanofiltration» Journal of Crystal Growth, vol. 428, pp. 71-79, 2015.

Work Context

The PhD student will work at the Institute of Materials Science of Mulhouse (IS2M, UMR 7361) in the Controlled Porosity Materials (MPC) axis as part of a collaboration with the MADIREL laboratory in Marseille, the institute ICGM in Montpellier and the LPCT laboratory in Nancy. This thesis is part of the ANR SAAMM project between the 4 partners mentioned above.

Constraints and risks

Nothing to declare

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