Post-Doctorat

Dans le cadre du Programme Régional CLIMIBIO (Contrat de Plan Etat-Région « Hauts de France » 2015-2020 et FEDER), nous recrutons des personnels affectés dans les différents laboratoires ou équipes du projet.

LPCA - Postdoctoral (9 month) : Instrument development for measurement of vertical concentration profile of GHGs by LHR / atmospheric radicals by FRS

Keywords : Laser heterodyne radiometry (LHR), mid-IR QCL, greenhouse gases (GHGs), OH radicals, Faraday rotation spectroscopy (FRS)

Project : (1) A mid-infrared laser heterodyne radiometer (LHR) is in development for ground-based in situ measurement of trace gases in the atmospheric column, in particular the development of a fiber coupling device to couple the sunlight to the laser heterodyne receiver which will allow us to realize a fully portable LHR for long-range, long-term and continuous atmospheric observation. The postdoctoral researcher will be involved in the development of the LHR, including: - Optimizing and testing the fiber-coupling system by following the sun movement;  - Optimizing and testing the fiber-coupled LHR in lab & in the field; - Testing and validating by field side-by-side inter-comparison measurement. 

or

(2) Development of a laser spectroscopic instrument based on Faraday rotation spectroscopy (FRS) for measurement of free radical OH in the atmosphere, including:

Test, characterization and calibration of the FRS instrument, and validation via intercomparison measurements with well established instruments such as FAGE. This project takes place in the framework of the regional program CLIMIBIO

Qualifications :  The candidate should have a PhD in optics. He/she should have expertise in the followings fields: laser and spectroscopic measurement techniques. Skills in data analysis and computer programming (LabView or equivalent) are also required.

Application : Candidates are invited to send their application by email, including a statement of research activities, a cover letter, a CV, as well name and address of two referees who could provide a recommendation letter.

Salary : About 2100 € monthly net wages. Dates The position can be available from June 1st 2018 

Lab location : Laboratoire de Physico-Chimie de l'Atmosphère (LPCA) Université du Littoral-Côte d'Opale (ULCO) 189A, avenue Maurice Schumann, 59140 Dunkerque, France

Contact : Pr. W. Chen (LPCA/ULCO), +33 (0)3 28 65 82 64

 

PC2A - Post-doctoral : Soot modelling in premixed flames - Effect of hydrogen and oxygenated compounds on soot nucleation and soot formation

Post-doctoral position at University of Lille (France)

Context and objectives

Reducing soot emissions from combustion processes is a major issue for energy and transportation industries. Many experimental and numerical investigations of sooting flames have been investigated over the past decades and have contributed to significant improvements in the understanding of the soot formation processes. However the transition from the gas phase to the solid phase leading to soot formation is not yet understood and this step is the subject of many efforts at PC2A laboratory by developing highly sensitive diagnostics, PAH modelling and more recently sectional approach for soot modelling*. Particularly all our recent activity is focused on premixed “nucleation flames” which have the special feature of producing nascent soot particles which undergo only minor soot growth along the flames. Therefore these flames are an excellent tool to better understand the nucleation process and have led to new input in soot modeling.

In the continuity of this research we are currently interested in the study of the influence of some additives on the sooting tendency in premixed laminar hydrocarbon flame conditions. The main objective is to identify the impact of hydrogen and oxygenated molecules on both gas and particulate phase chemistry in a wide range of operating conditions (equivalence ratios and proportion of the additives) including near-nucleation conditions.

A recent soot code based on the sectional method has been developed and its association with our kinetic mechanisms has been successfully carried out using Cantera code**. Our group wishes to recruit a postdoctoral researcher to support the development of this new theme. The person hired will support modelling soot volume fraction and particle-size distributions. The candidate is expected to be able to make the necessary improvements to the soot code for predicting the effect of hydrogen and oxygenated compounds on soot nucleation and soot formation.

*Mouton et al. Appl. Phys.B 112,369 (2013) ; Betrancourt et al. Aerosol Sci. Technol. 151, 916 (2017); El Bakali et al. Fuel 211, 548(2018) ; Desgroux et al. Combust. Flame 184, 153 (2017) ;

**Aubagnac-Karkar et al., Combust. Flame 189, 190 (2018)

Essential Requirements

Ph.D. degree in Chemical or Mechanical Engineering.
The position requires skills in:

  • Coding and software development skills (mainly C++/Python, other languages considered) in order to improve the existing sectional soot model implementation in Cantera;
  • Detailed soot modelling (sectional or moment methods, stochastic approaches)

Application

For application, send a detailed CV which includes the list of publications, a covering letter and contact details to:
Abderrahman El-Bakali / +33.3.20.43.48.04
Pascale Desgroux / +33.3.20.43.49.30

Position details

This work is supported by CPER CLIMIBIO. Month salary depends on candidate experience. Duration: 15 months. Start: at the latest September 2018.

 

SAGE - Post-doc sur l’étude des déterminants de l’évolution des composés organiques gazeux précurseurs d’aérosols dans le nord de la France au regard du changement climatique / Post-doctoral position on investigating the drivers leading to changes in aerosol-forming volatile organic compounds in north of France within the context of climate change

Dans le cadre du projet CLIMIBIO, le Département Sciences de l’Atmosphère et Génie de l’Environnement (SAGE) de l’Institut Mines-Télécom Lille Douai, France mène des activités de recherche en lien avec l’impact du changement climatique sur la qualité de l’air et la composition chimique de l’atmosphère.

Le poste est à pourvoir pour une période de 18 mois idéalement à partir d’avril 2018 et sera basé au département SAGE (59500 Douai, France).

 

The Department of Atmospheric Sciences and Environmental Engineering (SAGE) of IMT Lille Douai, France (http://sage.mines-douai.fr/), has ongoing research activities focused on the impact of climate change on air quality and atmospheric composition. SAGE is currently composed of a staff of about 50 persons including 15 full-time faculty members.

This fixed-term position is available for a total duration of 18 months at the SAGE department (59500 Douai, France), with an expected starting date on April 2018.

 

Description du projet / Project description :

La qualité de l’air du nord de la France est fréquemment impactée par des épisodes de concentrations élevées en particules atmosphériques (PM), riches en aérosols secondaires. L’une des conséquences du changement climatique en cours devrait être l’augmentation des émissions de composés organiques volatils (COVs) biogéniques, précurseurs d’aérosols organiques secondaires (AOS). Ce changement pourrait affecter non seulement la formation et la composition des AOS, mais aussi celle des aérosols inorganiques secondaires (AIS). En effet, plusieurs études de laboratoire ont montré l’influence des espèces inorganiques à l’origine des AIS (telles que SO2, NOx, NH3) sur les rendements de formation des AOS et, inversement, celle des COVs sur la formation d’AIS. Ces interactions complexes font encore l’objet d’études.

La mission proposée vient en synergie d’autres travaux menés en parallèle sur l’AIS. L’objectif est d’étudier les déterminants de l'évolution des composés organiques gazeux précurseurs d’aérosols en lien avec les concentrations en espèces particulaires observées dans le nord de la France, au regard du changement climatique. Une attention particulière sera portée au couplage des gaz précurseurs organiques et inorganiques dans la formation des aérosols secondaires.

La mission s’articulera selon les points suivants :

1) Conduire une campagne d'observation intensive des composés organiques et inorganiques gazeux d’intérêt pour la formation des aérosols et des espèces particulaires dans le nord de la France ;

2) Exploiter les mesures obtenues pendant la campagne en vue d'identifier les déterminants de l'évolution des composés organiques et inorganiques gazeux et particulaires au regard des sources, de l'origine des masses d'air et des paramètres météorologiques ;

3) Mettre en perspective les résultats et interprétations par rapport à la bibliographie et valoriser l'étude par l'écriture d'une publication internationale en anglais.

 

The north of France is submitted to frequent episodes of high particulate matter (PM) concentrations in ambient air, to which secondary organic and inorganic aerosols contribute largely. In the context of climate change it is predicted a possible increase in the emission of biogenic volatile organic compounds (VOCs), known as effective precursor gases for secondary organic aerosol (SOA). This change may modify not only the availability and chemical composition of SOA, but also of secondary inorganic aerosols (SIA). Indeed several laboratory studies have shown the influence of SIA precursor gases (e.g. SO2, NOx, NH3) on SOA formation yields and vice-versa of VOCs on SIA formation. These interactions are still not fully elucidated.

The main objective of this work is to investigate, within a context of climate change, drivers leading to changes in volatile organic compounds (VOCs) composition and levels that are precursors of aerosol particles observed in northern France. A special focus will be put on the coupling of both VOCs and SIA precursor gases for the formation of secondary particles.

This work will involve the following tasks:

1) Participate to an intensive field campaign in northern France to measure aerosol particles as well as inorganic species and VOCs of interest for their formation;

2) Analyze the field measurements to highlight the drivers controlling ambient levels of VOCs, inorganic species and aerosol particles in regards to their sources, the origin of air masses and meteorological parameters of interest for climate change;

3) Present these results into the context of existing literature and promote this work through the writing of an international publication.

 

Profil recherché / Profile :

Titulaire d’un doctorat ès sciences de l’atmosphère, l’intéressé(e) devra avoir une bonne connaissance de la problématique des composés organiques et de la formation des aérosols, de l’analyse par Aerosol Mass Spectrometry (AMS) et/ou Proton-Transfer-Reaction – Mass Spectrometry (PTR-MS). Une première expérience des campagnes d’observation sur le terrain, ainsi qu’une expérience avec IGOR et la modélisation sources-récepteur seront des atouts. La maitrise de la langue anglaise est un prérequis indispensable pour ce poste. Le permis de conduire est fortement recommandé.

Les candidats devront envoyer un CV, une lettre de motivation, et 2 lettres de recommandation à :

- Pr. Véronique RIFFAULT

- Dr. Sébastien DUSANTER

- Dr. Esperanza PERDRIX

 

The successful applicant will hold a Ph.D. degree in a relevant area of atmospheric sciences and will have a good knowledge of the field of research, as well as skills in Aerosol Mass Spectrometry and/or Proton-Transfer-Reaction Mass Spectrometry (PTR-MS). A previous experience of field measurements, as well as knowledge of the IGOR software and source-receptor models, will be assets for this position. Good proficiency in English is a prerequisite. A driving license would be a plus.

Applicants are invited to send their Curriculum Vitae, a cover letter, and two reference letters to:

- Pr. Véronique RIFFAULT

- Dr. Sébastien DUSANTER

- Dr. Esperanza PERDRIX