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Portail > Offres > Offre UMR5256-GEOPOS-001 - Postdoctorant en catalyse hétérogène, H/F

Postdoctoral fellowship in catalysis H/F

This offer is available in the following languages:
Français - Anglais

Date Limite Candidature : lundi 13 décembre 2021

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General information

Reference : UMR5256-GEOPOS-001
Workplace : VILLEURBANNE
Date of publication : Monday, November 22, 2021
Type of Contract : FTC Scientist
Contract Period : 12 months
Expected date of employment : 1 March 2022
Proportion of work : Full time
Remuneration : The gross salary will be in between 2690 and 3000 € per month depending on work experience
Desired level of education : PhD
Experience required : Indifferent

Missions

The main objective of the mission is to evaluate experimentally the performance of different solid catalysts for isopropanol (IPA) oxy-dehydration to acrolein. The focus will be on conversion, selectivity, carbon formation and catalyst stability/deactivation and correlation with the acid-base and redox properties of catalysts. The main issue is to limit the action of some basic sites irremediably present on the surface of any catalytic formulation, which yields families of undesired products.

The missions are part of a project funded by the European Community focusing on the production of acetone from industrial CO2 and green hydrogen. The conversion of aceton into isopropyl alcohol (IPA) will further enable the production of a range of value-added C3 molecules, such as propylene, propylene oxide and acrolein. Inside this project, the objective of IRCELYON, the only academic partner, is to develop a new route of acrolein synthesis namely the direct oxi-dehydration of IPA which requires multifunctional catalysts with redox and acid-base properties. A combination of environmentally friendly acid-base and redox catalysts will be designed to dehydrate IPA into propylene in the reaction conditions which are appropriate for propylene oxidation to acrolein. In collaboration with ARKEMA, we will finetune and optimize the acid-base and redox properties of oxide-based solids to obtain a breakthrough catalyst for IPA dehydration under oxidative atmosphere.
This study will include a large experimental part including the validation and optimization of a test bench, test performing, deep characterization of fresh and spent catalysts and detailed analysis of the results in order to understand the observed behaviors and to enable back-optimization of the catalytic system. Kinetics and thermodynamic studies of the reactions will be necessary.
Advanced characterization of the acid-base surface properties of catalysts before and after reaction using adsorption microcalorimetry of probe molecules in gas phase (supplemented by infrared spectroscopy) in order to establish a correlation between the state / the chemical structure of the catalyst and the catalytic reactivity.

Activities

The missions of the post-doc will be to:
● Validate and optimize the catalytic test bench
● Define a design of experiments
● Establish an experimental protocol according to the specifications
● Carry out the experiments on the catalytic test bench (screening at least 20 different acid catalysts, supplied by the industrial partners, in the absence and presence of oxygen, CO2 and steam; kinetic measurements)
● Determine and minimize any adverse effect of the by-products.
● Perform the characterization of oxide-type catalysts using a combination of various physicochemical methods (gas phase and liquid phase adsorption microcalorimetry, thermal analysis, BET, XRD, XPS, FTIR…)
● Analyze the results, understand the observed phenomena and propose practical and efficient solutions (choice of the best material and the best process configuration)
● Carry out literature review simultaneously
● Attend project meetings and communicate with the direct project partners
● Oral presentation of obtained results in English at progress meetings and at conferences in France and abroad.
● Write activity reports and scientific publications related to this work.

Skills

● PhD in catalysis or chemical engineering,
● Solid experience with experimental catalysis pilots and solid materials characterization techniques
● Expertise in gas chromatography
● Experience in the area of materials thermodynamics, kinetics studies and knowledge of vacuum techniques is highly appreciated
● Autonomy, rigor, good organization, perseverance and force of proposal
● Fluent in English
● Good communication skills, comfortable in multidisciplinary and inter-team work
● Clear written and oral reporting ability
● Aware of confidentiality rules

Work Context

The Institute for Research on Catalysis and the Environment of Lyon (IRCELYON) is a joint research unit of CNRS and University of Lyon1. With around one hundred permanent staff and at least as many PhD and master students, post-docs and guest researchers from around thirty different countries, IRCELYON brings together all competences in heterogeneous catalysis over the Lyon area and forms the largest laboratory in heterogeneous catalysis in France and Europe. All the activities of IRCELYON are directed towards a better understanding of catalysis and adsorption/desorption processes, in order to solve scientific issues that concern chemical, petrochemical and pharmaceutical industries and environmental issues. IRCELYON has all the analytical and physico-chemical characterisation tools of catalysts to push forward the frontier of knowledge in our field, while taking an integrated catalyst-reactor-reaction approach.
Inside IRCELYON, the INTRAA group (Integrated Thermodynamical, Reactional and Analytical Approaches) is involved in the development of new tools to solve scientific challenges in the fields of catalysis and environmental science. The specificity of the team is to bring in new methods, new instrument, integrated approaches, or original couplings between existing techniques. The group activities are divided in two main axes: (i) Spectroscopies, spectrometry and analytical chemistry and (ii) Catalysis and thermodynamics of the reaction.
Under the responsibility of Dr G. Postole (Assistant professor, UCBL) and Dr A. Auroux (DR1, CNRS), a 250 m2 laboratory is equipped with calorimetric techniques associated with many analytical tools (GC and HPLC chromatographs, mass spectrometers, IR-TF, UV-Vis, TG-DSC) which is the particularity of this laboratory. This large platform of differential reaction and scanning calorimeters makes it possible to work in gas-solid, liquid-solid or liquid-liquid media and allow access to the energies of reaction, adsorption, dissolution, phase transformation, etc. By using such advanced tools, we are involved in many projects around bioressources valorization through advanced catalytic processes (study of catalytic phenomena and interactions with gases or liquids) and energy storage. The importance of our projects lies in their double industrial and academic component, generally combining a strong societal impact and the acquisition of fundamental knowledge on the interactions brought into play during the catalytic act.
The successful candidate will work within the INTRAA (ATARI) group under the responsibility of Drs Aline Auroux (aline.auroux@ircelyon.univ-lyon1.fr) and Georgeta Postole (georgeta.postole@ircelyon.univ-lyon1.fr).

Additional Information

Applicants should have a PhD in Chemistry, Chemistry-Physics with application in catalysis.
The candidates should provide a CV, a letter of motivation and at least one recommendation.

More information abour the project:
https://cordis.europa.eu/project/id/101037009
https://www.sintef.no/en/latest-news/2021/converting-co2-emissions-into-products-european-green-deal-project-kicks-off/

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