Job title:
month postdoctoral contract (M/F)
Company:
Job description
Offer DescriptionThe main objective is to improve the selective transfer of radicals from the gas phase to the liquid phase. This objective will require a complete overhaul of the various modules making up the process in order to develop an original chemical process for the activation of liquids by non-thermal flow plasma.The mission is divided into three sub-objectives: 1) The first stage concerns the development of innovative plasma/liquid micro-structured reactors with a view to improving the transfer of radicals to the liquid phase by exploring flow regimes in micro-reactors. 2) Radical production will be optimised. This involves studying the impact of the physicochemical conditions of the electric discharge in the gas phase. The electrical excitation signal, which is known to have an impact on the production and relaxation of radicals as well as on the generation of heat loss, will be varied. Energy transfer to the chemical reactions of interest will be optimised by studying the electrical characteristics of the reactor. Different microreactor configurations will be considered, such as the coplanar DBD [9], the comb DBD, the gas cavity [10] and microjets [11]. The plasma phase will be characterised by optical emission spectrometry (OES) combined with simulations using COMSOL Multiphysics and Specair. 3) The final stage involves the design and development of new tools for fine control and optimisation of process parameters and radical production. The aim is to integrate the new reactor into an automated sequential flow platform, to accelerate the discovery of molecules and synthesis routes, while improving control of reaction conditions [12]. An automated sequential process will allow recirculation of solutions through the reactor, rapid screening of reagents and conditions, back-to-back reactions to test synthetic pathways, and on-line separation of products. Characterisation will include automated on-line electrical, optical and chromatographic measurements.The IRCP laboratory is exploring the integration of non-thermal plasma into continuous flow chemical processes as an alternative activation method. Such a method has the potential to provide access to new synthesis routes and to the design of more sustainable and economical processes. The optimisation of plasma/liquid interactions has led to the design of various two-phase gas/liquid flow microreactors. In these reactors, a plasma can be generated along the entire length of a channel in the gas phase, allowing strong interaction between short-lived reactive species in the plasma and species from the liquid phase [1,2]. This approach has been used to functionalise light volatile molecules using plasma generated by various reactive gases such as O2 for oxidation and NH3 for amination [3-5]. In order to extend the method to the modification of high added value non-volatile molecules, it is necessary to generate radicals in the liquid. This is generally achieved by transferring the species generated in the plasma to the liquid [6]. This strategy has been explored in particular for water activation, pollution control and medical applications, where it generates OH radicals [7,8]. However, the conversion of reactions remains limited by the transfer of radicals to the liquid phase, which requires rapid and quantitative transfer.Where to apply WebsiteRequirementsResearch Field Physics Education Level PhD or equivalentLanguages FRENCH Level BasicResearch Field Physics Years of Research Experience 1 – 4Additional InformationEligibility criteriaPhD in process engineering and/or plasma physical chemistry, ideally in the field of non-thermal plasmas at atmospheric pressure. Skills in micro-fabrication and process automation will be a plus.Additional commentsNone Website for additional job detailsWork Location(s)Number of offers available 1 Company/Institute Institut de Recherche de Chimie Paris Country France City PARIS 05 GeofieldContact CityPARIS 05STATUS: EXPIREDShare this page
Expected salary
Location
Paris
Job date
Wed, 25 Dec 2024 01:15:02 GMT
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