Interactions between Organic Compounds and Ionic Liquids. Selectivity and Capacity Characteristics of Ionic Liquids

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Predicting the Phase Equilibria of Carbon Dioxide Containing Mixtures Involved in CCS Processes Using the PPR78 Model

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Thermodynamic Models for the Prediction of Petroleum-Fluid Phase Behaviour

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Un module de gestion de mission autonome pour des satellites d'observation de la Terre

International audienceThis paper presents an autonomous controller developed for managing the activities of a new generation of Earth Observing Satellites (EOSs). This controller uses a hierarchy of reactors as in previously existing architectures, and it exploits specific r easoning p rocedures a t t he l evel o f e ach r eactor to get fast deliberations on-board. It is able to take into account the arrival of urgent acquisition requests, late cloud predictions , and information about the real volume of data, while meeting several operational requirements from the end-users

Inert and Reactive Working Fluids for Closed Power Cycles: Present Knowledge, Applications and Open Researches

The possibility of selecting the working fluid of a closed power cycle represents one of the most important levers to maximise the efficiency and to optimise the design of this technology. This chapter is intended to provide a description of the present state of knowledge on the effects that fluid thermo-physical properties, such as molecular complexity and molecular mass, have on the design and performance of cycle components. With a view to allow for accounting for multicomponent inert and reactive working fluids along the optimisation process, the chapter then presents the main outstanding scientific barriers which need to be overcome

A Predictive Equation of State to Perform an Extending Screening of Working Fluids for Power and Refrigeration Cycles

This chapter presents the features of the Enhanced-Predictive-PR78 equation of state (E-PPR78), a model highly suitable to perform “physical fluid screening” in power and refrigeration cycles. It enables, in fact, the accurate and predictive (i.e., without the need for its preliminary optimization by the user) determination of the thermodynamic properties of pure and multicomponent fluids usable in power and refrigeration cycles: hydrocarbons (alkanes, alkenes, alkynes, cycloalkane, naphthenic compounds, and so on), permanent gases (such as CO2, N2, H2, He, Ar, O2, NH3, NO2/N2O4, and so on), mercaptans, fluorocompounds, and water. The E-PPR78 equation of state is a developed form of the Peng-Robinson equation of state, which enables both the predictive determination of binary interaction parameters and the accurate calculation of pure fluid and mixture thermodynamic properties (saturation properties, enthalpies, heat capacities, volumes, and so on)

La constitution du secteur du handicap : un processus d'isomorphisme exemplaire La convergence de deux organisations vers le modèle de l'association gestionnaire (1945-1965)

Le secteur de la prise en charge des personnes handicapées (proposant une offre de services : éducation, hébergement, soins médicaux, insertion par le travail dans le cadre d'établissements spécialisés) présente aujourd'hui une forte homogénéité organisationnelle. Plus de neuf organisations sur dix composant ce secteur sont en effet de statut associatif. On peut qualifier ces associations "d'entreprises associatives gestionnaires" dans le sens où, agissant comme des auxiliaires de l'Etat-Providence (Marchal, 1992; Hely, 2004), leur gestion budgétaire est encadrée par les pouvoirs publics qui leur délivrent des autorisations de fonctionnement et des financements publics. Elles disposent de budgets importants, composés principalement de ressources publiques et emploient, bien davantage que d'autres associations, des salariés qualifiés, exerçant à temps plein. Cette forme organisationnelle est par ailleurs celle de la majorité des associations en faveur des personnes handicapées (Tchernonog, 2000).histoire, association, handicap

Fluid phase equilibria prediction of fluorocompound-containing binary systems with the predictive E-PPR78 model

International audienceIn order to reduce the overall emissions of greenhouse gases and to be in compliance with the current environmental regulations, a new class of refrigerants, making use of fluorocompounds has appeared. Such refrigerants are often blends of alkanes, CO 2 and fluorocompounds. Consequently an equation of state (EoS) able to predict the properties of both pure compounds and multi-component systems is required to design processes involving fluorocompounds or to implement a product-design approach aimed at identifying new refrigerant mixtures. It is however well-acknowledged that the phase behavior of binary systems like, e.g., an alkane and its corresponding perfluoroalkane, show significant deviations from ideality that need to be accurately accounted for by a thermodynamic model. In this study, in order to get a predictive model applicable to fluorocompound-containing binary systems, six groups were added to the Enhanced-PPR78 model which combines the Peng-Robinson EoS and a group contribution method aimed at estimating the binary interaction parameters, () ij kT, involved in Van der Waals one-fluid mixing rules