WorldCat Identities

El Khamlichi, Aicha (1982-....).

Overview
Works: 8 works in 10 publications in 2 languages and 10 library holdings
Roles: Opponent, Author
Publication Timeline
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Most widely held works by Aicha El Khamlichi
The carbon footprint of the carbon feedstock CO2 by Leonard Jan Müller( )

1 edition published in 2020 in English and held by 2 WorldCat member libraries worldwide

Valorisation des Dérivés Carboniques par hydrogénation : un challenge vers le développement de procédés éco-compatibles by Sebastien Coufourier( )

2 editions published in 2018 in French and held by 2 WorldCat member libraries worldwide

The use of carbon dioxide as a source of carbon C1 to produce chemical platforms or as a fuel source constitute an alternative to petrochemicals and could allow its recycling. Currently, the main described processes for the recycling and the valorization of CO2 are using reducing agents in stoichiometric amounts (which generates waste) or noble metals (limited availability, toxicity and high costs). In this environmental and economical race, one of the challenges of modern chemistry is the preparation of new organometallic iron complexes and their use in catalysis. Based on our expertise in the field of synthesis, catalysis and development of organometallic complexes, this work proposes to develop new fast, efficient, selective and eco-compatible methodologies for the reduction of carbon dioxide and carbonates by hydrogenation with bifunctional iron complexes
Immobilisation de catalyseurs dans des phyllosilicates et leurs applications dans des réacteurs continus by Aicha El Khamlichi( Book )

2 editions published in 2010 in French and held by 1 WorldCat member library worldwide

Ce manuscrit concerne le développement de procédés chimiques plus respectueux de l'environnement. Cela contribue à l'effort de progression vers une chimie durable en permettant une économie de matière et d'énergie. Notre approche utilise la montmorillonite comme support de catalyseur hétérogène. Ce matériau lamellaire naturel peut être facilement modifié par échange de cations se trouvant entre les feuillets d'aluminosilicates. Des complexes de palladium avec ou sans ligands ont été immobilisés par une méthode générale développée au laboratoire. De nombreuses analyses de ces composites ont été réalisées et ont confirmé l'intercalation des complexes métalliques. Ces matériaux hybrides fonctionnels ont ensuite été implémentés en réacteurs continus. Ces technologies améliorent grandement l'efficacité énergétique du procédé. En outre, ils permettent un meilleur contrôle des conditions opératoires ce qui induit une meilleure sélectivité. Nous avons observé dans le cas du couplage palladocatalysé de Heck-Mizoroki, une très bonne activité et une excellente sélectivité. Le système s'est avéré très stable, ne générant que très peu de relargage du métal, ce qui a permis son utilisation pendant plus de 60 h
Evaluation et suivi de solvants innovants pour le captage de CO2 présentant une faible pénalité énergétique (<10 %) : développement de stratégies analytiques permettant la compréhension des phénomènes physico-chimiques mis en jeu en vue de leur modélisation by Lorena Cuccia( )

1 edition published in 2018 in French and held by 1 WorldCat member library worldwide

Post-combustion CO2 capture using amine solvents is nowadays the most promising technology to limit the CO2 emissions from already existing power plants. The two main limitations of the process are the high energy penalty and the irreversible degradation of amines involving the formation of degradation products potentially toxic for human and the environment. Within the scope of this project, three innovative solvents were selected for their good thermodynamic properties for CO2 capture: the blends 1-methylpiperazine / piperazine (1MPZ/PZ), dimethylaminoethanol / piperazine (DMEA/PZ) and methyldiethanolamine/monoethanolamine (MDEA/MEA). The three blends were degraded in conditions representative of industrial conditions for post-combustion CO2 capture on a lab scale pilot plant constructed by EDF R&D. Complementary analytical methods involving gas and liquid chromatography were developed in order to monitor the stability of the constituent amines, and to identify and quantify potential degradation products formed. These methods permitted the characterization of both the liquid phase of the solvent and the gaseous phase corresponding to the treated flue gas. Results obtained during this project showed that the blend MDEA/MEA would offer the best compromise in terms of chemical stability and energy needed for the process. This solvent presents degradation rates lower than the blends 1MPZ/PZ and DMEA/PZ and would enable a reduction of the reboiler heat duty in the range of 10% when compared to MEA 30% the benchmark solvent of the process
Recyclage du CO2 : Une alternative à la pétrochimie pour la synthèse de molécules azotées by Enguerrand Blondiaux( )

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

Les ressources carbonées fossiles (pétrole, charbon, gaz) couvrent 85 % des besoins énergétiques mondiaux et servent de matières premières pour 95 % des consommables chimiques organiques (plastiques, engrais, pesticides...). L'amenuisement des ressources pétrolières et l'accumulation du CO2 résultant de leur utilisation posent donc un problème écologique, énergétique et de disponibilité en matières premières pour l'industrie chimique. Dans ce contexte, il convient de proposer de nouvelles voies de synthèse de consommables chimiques, de manière à construire une industrie durable basée sur l'utilisation de ressources carbonées renouvelables. Contourner la pétrochimie et valoriser au maximum son déchet carboné, le CO2, pour construire des édifices moléculaires sans vocation énergétique (polymères, engrais, textiles synthétiques...) représente donc un enjeu scientifique de premier plan. Dans cet optique, de nouveaux procédés de synthèse de molécules azotées ont été mis au point à partir de CO2 comme source de carbone, d'amines comme source d'azote et de réducteurs doux de type hydrosilanes et hydroboranes comme source d'hydrogène. Ces procédés sont accélérés par l'utilisation de catalyseurs sans métaux et permettent de produire des formamides, des formamidines, des aminals et des méthylamines, qui constituent des molécules de bases de l'industrie chimique
Synthèse de nouveaux ligands tripodes et de leurs complexes de coordination pour l'activation de petites molécules by Alicia Aloisi( )

1 edition published in 2018 in French and held by 1 WorldCat member library worldwide

The extensive use of fossile fuel is currently causing climate change. Anthropogenic emissions of CO₂ enhance the greenhouse effect, resulting in global warming. In order to mitigate this climate change, the share of renewable energy is increasing and hydrogen seems to be a good candidate to stock energy to compensate the seasonal variations of those energies. One way to store H₂ is the hydrogenation of CO₂ to synthesise liquid molecules as formic acid and methanol. Those liquids can be conveyed in an easier way. In case of a lack of energy, H₂ can be recovered through dehydrogenation of those molecules thinks to catalysts. In this thesis, we studied the synthesis of organometallic complexes able to activate those small molecules, thus, growing a fundamental knowledge. As a number of triphos-metal complexes are known to catalyse hydrogenation and dehydrogenation reactions, we focused on the elaboration of ligands alike. With those ligands in hand, several non-noble metal based complexes (Fe (II), Co (II) and Cu (I)) were synthesized, which are active in CO₂ hydroboration catalysis. A complex of ruthenium(II)was grafted on silica through one of this ligand, in order to recycle it when it used as a catalyst. On the second hand, we designed a new ligand which could favor metal-ligand cooperativity. H₂ was succesfully activated with a copper(I) complex coordinated by this ligand, demonstrating that cooperation of the ligand. Finally, the first known cobalt complex active in dehydrogenation of formic acid was synthesised
Stockage du CO2 par carbonatation minérale de l'olivine : étude du procédé global pour la valorisation des produits de la réaction et la séparation des particules de chromite par flottation by Laura Turri( )

1 edition published in 2017 in French and held by 1 WorldCat member library worldwide

This work deals with the study of direct carbonation of olivine in solution, for the chemical transformation of CO2 emitted by the industries. The influence of operating conditions is evaluated in order to optimize the yield of the reaction. However, for environmental acceptability and economic viability of the project, the beneficiation of recoverable metals and products is considered. Chromite particles contained in olivine are unreactive during the carbonation reaction: the separation is developed by flotation upstream of the reaction. According to the results, the extraction of chromite by magnetic separation is also conceivable. Gravimetric separation by sedimentation is considered to recover residual olivine in the reaction products, in order to recycle them in the carbonation process. Products sieving allowed to concentrate carbonates (less than 40 µm) and silica (between 40 and 106 µm). However, the co-precipitation of mixed carbonates due to the presence of iron and nickel included in the magnesium matrix, compromises the purification and the optimal valorization of the solids. Moreover, the formation of a passivation layer on the particles surface limits the conversion of olivine. Pretreatment of olivine is envisaged for the leaching of nickel in ammoniac solution. Besides, preliminary dissolution of olivine and selective precipitation of species with pH control of the solution can be an interesting alternative for higher carbonation extent and more efficient purification of the products
 
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Alternative Names
Khamlichi, Aicha El

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