Total catalytic oxidation of a side-product for an autothermal restoring hydrogen process

International audienceThe catalytic total oxidation of toluene is used to bring the required calories to restore hydrogen from methylcyclohexane (MCH). Two coupled reactions, both catalyzed by Pt/alumina, are thus considered in one autothermal heat-exchanger reactor (HER): endothermic dehydrogenation of methylcyclohexane and catalytic combustion of less than 10% of produced toluene (6% for the chemical reaction, about 4% for heat losses). Both reactions are carried out at 350 °C. Methylcyclohexane and toluene light-off curves have been performed in one elementary module. Methylcyclohexane combustion has been eliminated due to its safety drawbacks, although the MCH combustion provides best stability to autothermal HER

Europe centrale et orientale

Morgane Labbe, maitre de conférencesJerome Heurtaux, maître de conférences à l’Université Paris-Dauphine Les États en Europe centrale et orientale XIXe-XXIe siècle : approches croisées des sciences sociales Le séminaire proposait d’étudier les États et sociétés d’Europe centrale et orientale à partir de la diversité de leurs expériences historiques. Il s’est donné comme première ambition de croiser les approches disciplinaires pour inviter les étudiants à décloisonner un domaine longtemps fig..

Europe centrale et orientale

Morgane Labbe, maitre de conférencesJerome Heurtaux, maître de conférences à l’Université Paris-Dauphine Les États en Europe centrale et orientale XIXe-XXIe siècle : approches croisées des sciences sociales Le séminaire proposait d’étudier les États et sociétés d’Europe centrale et orientale à partir de la diversité de leurs expériences historiques. Il s’est donné comme première ambition de croiser les approches disciplinaires pour inviter les étudiants à décloisonner un domaine longtemps fig..

États et sociétés en Europe centrale et orientale (XIXe-XXIe siècle)

Morgane Labbé, maîtresse de conférencesJérôme Heurtaux, maître de conférence à l’Université Paris-DauphineFrédéric Zalewski, maître de conférences à l’Université Paris-Ouest Nanterre La-Défense Enseignement suspendu durant l’année universitaire 2011-201

Communismes et sortie du communisme

Rose-Marie Lagrave, directrice d’étudesMorgane Labbé, maîtresse de conférencesJérôme Heurtaux, post-doctorant Communismes et sortie du communisme Ce séminaire a réuni des étudiants et des jeunes chercheurs travaillant sur l’Europe centrale pour les amener à exposer et à discuter de leurs recherches en cours selon une perspective d’histoire croisée des communismes, et une approche réflexive sur les concepts de la transition postsocialiste. Cet angle méthodologique s’est ouvert à une diversité ..

Communisme et sortie du communisme

Rose-Marie Lagrave, directrice d’étudesMorgane Labbé, maîtresse de conférencesJérôme Heurtaux, postdoctorant Ce séminaire a réuni des étudiants issus des Ateliers d’Europe centrale et des jeunes chercheurs travaillant sur cette région, autour des exposés de leurs recherches en cours, mis ensuite en discussion collective. Espace d’échange critique, le séminaire fut aussi le lieu de l’apprentissage de cet échange, notamment autour de la tension spécifique qui se noue entre spécialisation sur un..

MULTI-STAKEHOLDER VARIETAL INNOVATION PLATFORMS. A SOCIOTECHNICAL PARTNERSHIP RESEARCH SCHEME ASSESSED IN BENIN

International audienceParticipatory plant breeding research may be hampered by the fact that results that have been obtained in very specific localized settings cannot be disseminated and scaled. Varietal innovation platforms aim to overcome this problem by ensuring that the viewpoints of people involved in assessments are representative of broad interest groups and that assessment results will be validated and disseminated by an organization. Each platform is designed as a sociotechnical scheme consisting of a five-member steering committee (SC), a club with a membership of 25 local users and experts (CLUE), a common varietal test plot and a network of around 15-20 on-farm plots. The aim is to describe, evaluate and disseminate improved varieties to target groups of stakeholders faced with the same environmental, agricultural and socioeconomic constraints. Partnerships between all of these stakeholders are set up, organized and managed according to six principles outlined in a charter—legitimacy, competence, efficiency, democracy, solidarity and transparency. Two experimental platforms were set up in the villages of Zé and Tori-Bossito, in southern Benin, to assess plantain varieties released by the Centre africain de recherche sur le bananier et le plantain (CARBAP). These platforms were monitored 20 months following their creation. The survey showed that the two platforms had successfully carried out all of their initially planned activities. The CLUEs identified four interesting varieties. The survey focused on the future plans made by SC and CLUE members to tap the benefits of knowledge acquired during 18 months. It showed that: (i) their plans provided conditions favorable for varietal dissemination and scaling, (ii) SC plans were based on transfer of the platform scheme whereas the CLUE plans were based on varietal dissemination, and (iii) the Tori plan was collective while the Zé plan was more individually focused. Our analysis highlighted that the respect of the legitimacy, skill and solidarity principles was most required to expect successful dissemination of the results obtained on the platforms