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Portal > Offres > Offre UMR5518-STEVER-003 - H/F-Psot doc : Production de pâte à dissoudre par un procédé à base de solvants Eutectiques Profonds

M/W - Post-doc position - FProduction of Dissolved pulp by Deep Eutectic Solvents (Deep Eutectics Solvents)

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

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General information

Reference : UMR5518-STEVER-003
Workplace : ST MARTIN D HERES
Date of publication : Friday, January 10, 2020
Type of Contract : FTC Scientist
Contract Period : 12 months
Expected date of employment : 1 February 2020
Proportion of work : Full time
Remuneration : 2617.05 euros
Desired level of education : 5-year university degree
Experience required : Indifferent

Missions

The main objective of the DISSOLDES project is to develop a new process for the production of dissolving pulp. This process will be more respectful of the environment than conventional processes (by reducing CO2 emissions and energy consumption), without altering the pulp quality.
During this production, the quality of the cooking effluents and their potential recyclability will be evaluated.

The innovative characters of the project reside in: (i) the use of new specific chemicals “Deep Eutectic Solvents” (DES) for pulp production (a mixture of 2 natural, biodegradable, water-miscible, inexpensive, no-toxic, no-volatile and no-flammable compounds), (ii) the development of a greener process, which will generate less CO2 and will consume less energy, (iii) the development of a method for DES recycling, present in black liquor, and (iv) an application with high added value and in full growth: dissolving cellulose.

Activities

Task 1. Based on previous studies, a DES-type solvent will be selected and used to dissolve lignocellulosic compounds in softwood or hardwood chips under less drastic conditions than conventional kraft or acidic cooking used to produce the dissolving pulp (lower temperature and shorter reaction times than conventional process). Subsequently, the produced pulp will be bleached by a conventional sequence or by a sequence including the new Dalkmod bleaching stage patented by LGP2 and CTP. The reaction conditions during DES cooking and during the bleaching sequence will be adapted in order to modulate the size of the polysaccharide chains, but also to de-structure and enrich the resulting pulp in carboxyl groups, in order to promote its dissolution during its usage.
Task 2. will be devoted to the recovery and the purification of the black liquor produced during the DES cooking, by different techniques (ultrafiltration, precipitation, solvent exchange ...).
Task 3. will consist in the understanding of the reactional mechanism of DES on wood, thanks to the use of different analytic techniques applied on the lignocellulosic product before and after pulping (13C NRM, SEC analysis of the polysaccharide fraction...)

Skills

The applicant must have a PhD degree and strong academic background in chemical engineering, basic chemistry, both organic and analytical chemistry. Applicants who have already worked in laboratory on lignocellulosic materials are of special interest. Personal skills include social competence. An open and inclusive personality, an independent thinking and attitude are all useful qualities. The position requires a very high level of accomplishment in writing and communication in English

Work Context

The successful applicant will be hosted by the LGP2 (Laboratory of Pulp and Paper Science and Graphic Arts, Grenoble INP, France) in the “BioChip (Biorefinery: chemistry and eco-processes)” team and in the CTP (Centre Technique du Papier, Grenoble). He/she will work under the supervision of Pr. Gérard MORTHA and Dr. Nathalie MARLIN from LGP2, Dr. Sandra Tapin Lingua from FCBA and Dr. Auphélia BURNET from CTP.
The LGP2's research focuses on processes for the conversion and the valorisation of the vegetal biomass such as the biorefinery and the manufacturing of bio-based materials (paper and cardboard, composites, films, nonwovens) and on printing processes for surface functionalization. LGP2 develops research on green processes with an emphasis on material and energy saving and on sustainable chemistry for new functional materials. The research projects rely on the development or the adaptation of multi-scale characterization tools.

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