WorldCat Identities

Marion, Philippe (19..-....).

Works: 5 works in 5 publications in 1 language and 5 library holdings
Roles: Opponent
Publication Timeline
Most widely held works by Philippe Marion
Valorisation des sucres dérivés des hémicelluloses by Elie Derrien( )

1 edition published in 2015 in French and held by 1 WorldCat member library worldwide

Étude sur la dépolymérisation catalytique de la lignine en milieu oxydant : vers la production d'aromatiques biosourcés by Cédric Cabral Almada( )

1 edition published in 2015 in French and held by 1 WorldCat member library worldwide

This work is part of the CHEMLIVAL project aiming at the lignin valorization into functionalized aromatics compounds (functions : aldehydes, carboxylic acids, phenols) for fine chemistry or polymer applications. With this in mind, we studied lignin valorization through heterogeneous catalytic oxidation in alkaline media, an environmental friendly approach, for the production of aromatic compounds such as vanillin or syringaldehyde. After an extensive characterization of the different lignin samples used, we proceeded to an optimization of the conditions parameters (temperature, pressure, catalysts...) and kinetics study. As a results, yields similar or even higher than those reported in the literature were obtained. This work demonstrated that the lignin source as well as its extraction process has a great influence over the aromatic yields. Furthermore, the results acquired allowed us to propose a reaction scheme for lignin oxidation. The use of a catalyst (Pt/TiO2) was found to be beneficial for the production of aromatic compounds probably due to metallo-initiated mechanism that still needs to be identified
Transéthérification du glycérol par les alcools gras. Etude physico-chimique de la miscibilité des réactifs en présence de catalyseurs solides by Guillaume Malcouronne( )

1 edition published in 2015 in French and held by 1 WorldCat member library worldwide

The objective of this work is the conception of emulsion catalysed by Pickering nanoparticles inorder to synthetize biosurfactant. Our strategy was based on functionalised mesoporous materials(MCM-41). These materials combine both emulsion stabilisation and reaction catalysis.After a bibliographic study on glycerol, surfactants, Pickering emulsions and mesoporousmaterials; our strategy was to functionalise these materials. After charaterisation, these materialswere tested in bipohasic model reactions (acetalysation and ester hydrolysis). We come to the end of this study by testing these catalysts in our target reaction (glycerol etherifaction from fattyalcohol).The MCM-41 was synthetized by using a microwave heating. The grafted functions on our materials can both make several hydrophilic-hydrophobic materialsas possible and provided them some catalytic functions. The nanoparticles were characterized byTGA, BET, XRD, elemental analysis, acidity and particle size.Catalyst from Aerosil® 200 and carbon nanoparticles were also tested. A long alkyl chain (C18) and small nanoparticles (Aerosil® 200 and carbon nanoparticles) supportthe emulsion's stability. Nevertheless, the porous inside our materials is not interesting on acatalytic point of view
Conception de biosolvants à partir de la molécule plateforme furfural, en laboratoires virtuel et réel by Manon Bergez-Lacoste( )

1 edition published in 2013 in French and held by 1 WorldCat member library worldwide

The solvents play a significant role in the chemical industry and are at the heart of many applications such as the formulation of pesticides, inks or paints, industrial cleaning or extraction processes, synthesis and separation. The depletion of fossil resources, stricter regulations and collective awareness incite the development of alternatives to the use of petrochemical solvents. In fact, about 45% of emissions of volatile organic compounds (VOCs) come from the use of solvents, most of which have a very unfavorable environmental and health impact. The panorama of industrial solvents inevitably initiates a change, which requires the search for more eco friendly solvents in terms of their properties and their mode of production. In addition to the ionic liquids, supercritical fluids and fluorinated solvents, called green solvents, biosolvents emerged as an alternative capable of meeting a large number of specifications required in various applications. Developing biosolvents is accompanied by a change in raw material, from petroleum to renewable resources from biomass. Among the biobased platform molecules used for the synthesis of bioproducts, furfural, obtained by dehydration of sugars in corn cobs, was selected as part of this study to develop new biosolvents in collaboration with Rhodia-Solvay (InBioSynSolv project). Thus, to replace conventional solvents used in phytosanitary formulations or for industrial cleaning, two methodologies different from the tests and error approach, were studied. The first methodology, predictive, is based on the properties prediction before the synthesis of the molecules. The inverse formulation is, in turn, an innovative methodology to design molecules of biosolvents through a virtual laboratory. Stages of generation of molecular structures and properties prediction are integrated in a computer-aided molecular design tool (CAMD) providing solutions that meet the outlined specifications. First, these methodologies have led to identify a pool of candidate molecules derived from furfural that may act as a solvent for the intended applications. In a second step, the feasibility of their production chains has been studied from the molecule platform to the use of the biosolvent in a formulation. For this, the candidate molecules were obtained by different synthetic routes, which were characterized using the determination of green indicators. An eco-design approach has also contributed to take into account different criteria including technical, environmental and socio-economic aspects. Finally, with the production of samples, properties were experimentally verified, to validate the interest of solvents substitution methodologies in terms of time savings and efficiency. These could be generalized to the development of various bioproducts to make possible innovation in the chemical industry
Transformation du glycérol par catalyse hétérogène : aspects théoriques et expérimentaux by Florian Auneau( )

1 edition published in 2011 in French and held by 1 WorldCat member library worldwide

This thesis reports a study of the heterogeneously catalysed conversion of glycerol into 1,2-propanediol (1,2-PDO) and lactic acid (LA). The mechanism and the first step of the reaction are especially debated, as it can be either dehydration or dehydrogenation. It is expected that these elementary steps can be influenced by pH variations and by the nature of the gas phase. These parameters were consequently investigated experimentally in the presence of a carbon supported rhodium catalyst. On the other hand, there was a lack of knowledge in the behaviour of glycerol at the surface of the metallic catalyst. A theoretical approach on a model Rh(111) surface was thus implemented in the framework of Density Functional Theory (DFT) to look over the alementary reactions and to calculate the corresponding transition states. The combination of experimental and theoretical results has shown that dehydrogenation into lyceraldehyde is the first step of the reaction on the Rh/C catalyst in basic media under He or H2 atmosphere. The study was then extended to carbon supported iridium catalyst that lead to the best 1,2-PDO and LA yields. The use of iridium catalyst supported on calcium carbonate allowed obtaining higher yields in LA, but catalytic performances were lower. This latter catalyst was surprisingly quite active when performing the reaction in neutral water, which provides opportunities for a greener synthesis of LA. Last, the predictive aspects of the theoretical chemistry were investigated to determine whether the reactivity of this polyalcohol can be modelized by the reactivity of a simpler monoalcohol on the surface
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French (5)