Pilar Munuera Gómez

Could the energy cost of using supercritical fluids be mitigated by using CO2 from carbon capture and storage (CCS)

This article explores the possibility of utilising supercritical CO2 obtained from carbon capture and storage (CCS) as a solvent and examines the hydrogenation of isophorone to 3,3,5-trimethylcyclohexanone using supercritical CO2 with added N2, CO or H2O to emulate the contaminants expected in CO2 from CCS. None of the impurities appear to cause insuperable problems in the hydrogenation of isophorone when present at concentrations likely to be found in CO2 from CCS. N2 introduces modest changes in phase behaviour at some pressures, while CO and H2O reduce the activity of the catalyst. However, the activity can be largely regained by increasing the reaction temperature.

Mediación en situaciones de dependencia: conceptos claves y marco jurídico relevante

Los retos en la acogida de la poblacion inmigrante: del como y el por que desde las escuelas de trabajo socialLa formacion de los trabajadores sociales en Francia: enfoques eticos desde una perspectiva de mutacion socialEl proceso de ensenanza-aprendizaje de lso contenidos procedimentales en la asignatura trabajo social II-UNLU

El trabajador social como asesor familiar.

Se plantea la necesidad social que las familias tienen de recibir asesoramiento sobre sus problemas, en los diferentes momentos por los que pasan en su ciclo vital, y la oportunidad de la figura del trabajador social para desarrollar tareas encaminadas a proporcionar dicho asesoramiento familiar.

Modeling the Regeneration of a Polymeric Resin Column Saturated with Ethanol by Air Purge and External Heating

In this work, the regeneration of a polymeric resin column saturated with ethanol with air purge and external heating has been studied. A theoretical model is proposed for describing the mass and heat transfers in the system, and it has been validated with experimental data. This model can be used for simulating the regeneration step in a concentration-thermal swing adsorption process for fuel-grade ethanol production. The model has been used to analyze the process dynamic behavior, and to compare the performance of the regeneration step using external heating and hot air purge.

Modelling the Desorption of Ethanol from an Externally Heated Saturated Activated Carbon Column by Purging with Air

The desorption of ethanol from an externally heated column loaded with activated carbon and purged with air has been studied. The column was initially saturated with liquid ethanol. This process simulates the regeneration step in a concentration-swing/thermal-swing adsorption process for the production of fuel-grade ethanol. A theoretical model was developed for describing the mass- and heat-transfer kinetics of the process. Validation of the model was achieved by comparing its predictions with experimental data, employing initial column temperatures between 298 K and 395 K and air flow rates between 1.6 × 10−6 m3/s and 11.3 × 10−6 m3/s. Experimentally measured adsorption isotherms of ethanol from ethanol/air gas mixtures onto activated carbon, as well as the regeneration column dynamics, are reported.

Estimation of Adsorption Parameters from Temperature-programmed Desorption Thermograms: Application to the Adsorption of Carbon Dioxide onto Alumina

In this work, a model is proposed for estimating the desorption activation energy from a TPD thermogram. The model considers the effects of diffusional resistance, the reactor cell volume, the sample weight and the carrier gas flow rate. The adsorption and desorption rate constants are estimated using theoretical expressions deduced from statistical thermodynamics, assuming first-order desorption kinetics. This model has been applied to the CO2/activated alumina system. The TPD thermogram has been obtained with a commercial apparatus, and the distribution of the desorption activation energy has been analyzed. A sensitivity analysis has been performed to determine the importance of different phenomena which can alter the position of the TPD peaks (re-adsorption, diffusional resistance, volume of sample cell). An experimental study of the effect of diffusional resistance has also been performed, comparing the TPD thermograms obtained with powdered and pelletized alumina. The experimental results have been compared with the model predictions.

Reflexiones sobre las Prácticas de Trabajo Social.

Las reflexiones, sobre el programa de practicas de la Escuela de Trabajo Social de la Universidad Complutense de Madrid, son la excusa de la que se sirven los autores para plantear una serie de reformas metodologicas en las formas y maneras de impartir la docencia en Trabajo Social. Desarrollan aspectos innovadores utilizados en la realizacion de un taller de entrenamiento sobre la relacion de ayuda que se establece entre el trabajador social y el cliente y la eleccion de la problematica a tratar en la intervencion.

Cobb, Sara (2013). "Speaking of Violence. The Politics and Poetics of Narrative in Conflict Resolution"

desarrollo del Trabajo Social. Estos son, sin duda, los ejes sobre los que deberá pivotar el esfuerzo las próximas décadas. Muestra de ello es este texto de referencia para el ámbito académico y profesional, para docentes, investigadores/as, profesionales y alumnado, en la medida en que ayuda a vislumbrar el conjunto de desafíos actuales y futuros, dibujando el camino por el que necesita transitar el Trabajo Social.