Introduction to Aromaticity and A. Homologous Series Study 2. Three and Four Benzenoid Rings Undeniably, the concept of aromaticity is theory- 3. Five or More Benzenoid Rings dependent and, as documented by the contributions B. Pyrene numerous definitions, manifestations, and ramifica- 2.
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Perylene tions. The current study adopts an experimental 3. Coronene thermochemical perspective in the examination of the aromatic or nonaromatic or antiaromatic character C.
Stabilization Energies in Benzenoid Hydrocarbons of organic compounds. The enthalpies of formation we cite are derived from such calorimetric measure- IV. Effect of Alkylation ments as enthalpies of combustion and hydrogenation A. Most of the thermochemical B. Polyalkylation: Additivity of Small data are from the evaluated archival source,1 which Substituents on Benzene contains all the original literature citations, unless C. Following thermochemical conven- D. Methylated 3- and 4-Ring Species kcal. Since aromaticity and antiaromaticity are con- V. Energetics of Hydrogenation Reactions sidered to be properties of isolated molecules, all VI.
Cyclophanes thermochemical data herein refer to the gas phase VII.
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Polyphenyl and Other Polyaryl Compounds at standard temperature and pressure unless an- A. Biphenyl other phase is specified.
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Polyphenyls ods for estimating phase change enthalpies, at least D. Cyclic Polyphenyls: Biphenylene and for hydrocarbons. As such, data for enthalpies of Triphenylene formation in the condensed phase liquid or solid will E.
Benzoannelation and Annelation of Benzene sured or estimated phase change enthalpy to allow A. Benzoannelation for discussion of the idealized gas phase i.
The lignin as a bio-resource of aromatic compounds !
Enthalpies of vaporization liquid to gas B. Cyclobutadiene, Its Benzo Analogues, and of hydrocarbons will be derived using eq 1, taken the 3456Phenylenes from ref 2, and those of sublimation solid to gas by IX. Although numerous classes of compounds exhibit aromatic character, almost all of the experimental thermochemical studies have been performed on carbocyclic species. This study, therefore, focuses on neutral, -conjugated, carbocyclic systems and some of their alkylated and arylated derivatives.
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The main objective of this project is to develop a flexible process adapted to a wide range of lignins with selective catalysts in order to get mainly aromatics in the liquid effluents for a potential industrial valorization. In order to achieve this goal, the hydroconversion of, at least two different types of lignins, one from pulp industry, and one produced during cellulosic ethanol production, will be studied in addition to the wheat straw lignin used previously.
The methodology planned for this project includes a study of the lignin solubility, a catalytic screening, the kinetic modeling of the hydroconversion and the evolution of the batch system into a semi-continuous reactor with further improvements, like for instance, solid injection, continuous gas phase feeding and water removal. The catalyst screening will be driven by the selective production of aromatic compounds and based on previous achievements on the study of bio-oils.
A kinetic modeling study of the lignin hydroconversion, based on a stochastic approach from carbon numbers distribution, will afford a better understanding of the different steps involved according to the nature of the solvent and the temperature.gelatocottage.sg/includes/2020-02-23/4587.php
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All these results will be a first step towards the design of a continuous process more suitable for industrial applications. The consortium involved for this project includes academic experts in the different complementary fields such as heterogeneous catalysis, kinetic modeling, chemical engineering and one industrial partner to fit with the industrial requirements in this particular challenging scientific area.
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The Energetics Of Aromatic Hyctocarbons: An Experimental Thermochenical Perspective
Learn more. Your browser is blocking third-party content, we have taken your choice into account. These cookies are used to know or improve the performance of the site during your browsing. Kinetic experiments methodology. Scientific productions and patents. Submission summary.
Institut de recherches sur la catalyse et l'environnement de Lyon Laboratoire public The author of this summary is the project coordinator, who is responsible for the content of this summary.