2958 research outputs found
Sort by
Experimental and Simulation Study of Adsorption in Postcombustion Conditions Using a Microporous Biochar. 1. CO2 and N2 Adsorption
Get PDFThe influence of N2 on CO2 adsorption was evaluated using a microporous biochar with a narrow pore size distribution. The adsorption isotherms of pure CO2 and N2 were measured at 0, 30, 50, and 70 °C up to 120 kPa and fitted to the Toth adsorption model. Dynamic breakthrough experiments were carried out in a fixed-bed adsorption unit using binary mixtures with compositions representative of different postcombustion streams (8–30% CO2) from ambient temperature to 70 °C. Dynamic adsorption experiments were simulated to validate the mathematical model of the adsorption process, as a necessary step for its later use for process design. The Ideal Adsorption Solution (IAS) theory, based on the pure component adsorption models, was used to account for competitive adsorption with satisfactory results. The information gathered in the present work will be used to extend the validity of the model to the adsorption of postcombustion streams containing H2O in part 2.Work was carried out with financial support from the HiPerCap
Project of the European Union 7th Framework Programme
FP7 (2007-2013; Grant Agreement number: 60855). M.G.P.
acknowledges funding from the CSIC (JAE-Doc program
cofinanced by the European Social Fund). N.Q. acknowledges
funding from the Government of the Principado de Asturias
(Severo Ochoa Program). The authors also appreciate the
support from the technical consultants of AspenTechnology
Inc., M.M. and E.L
Experimental and Simulation Study of Adsorption in Postcombustion Conditions Using a Microporous Biochar. 2. H2O, CO2, and N2 Adsorption
Get PDFThe adsorption behavior of humid mixtures that are representative of postcombustion conditions on a microporous biochar was evaluated. The adsorption isotherms of H2O(v) were measured at 30, 50, and 70 °C up to the saturation pressure and fitted to the extended Cooperative Multimolecular Sorption (CMMS) model. Dynamic experiments were carried out in a fixed-bed adsorption unit with mixtures of N2, CO2, and H2O(v). Experimental results indicate that H2O is little affected by CO2 adsorption. On the other hand, the CO2 adsorption capacity can be reduced by the adsorption of H2O. The extent of this reduction is dependent on the amount of H2O adsorbed, which, in turn, is strongly dependent on the relative humidity of the gas phase and the adsorption time. A dynamic fixed-bed adsorption model that makes use of Ideal Adsorbed Solution (IAS) theory has been shown to be adequate to describe the adsorption behavior of CO2 from the ternary mixtures in the full range of conditions evaluated.Work carried out with financial support from the HiPerCap
Project of the European Union 7th Framework Programme
(FP7) (2007-2013; Grant Agreement No. 60855).M.G.P. acknowledges funding from the CSIC (JAE-Doc
program cofinanced by the European Social Fund). N.Q.
acknowledges funding from the Government of the Principado
de Asturias (Severo Ochoa program)
"Seguendo le Tracce degli Antichi". Un proyecto nacido para dar a conocer las múltiples maneras de hacer Arqueología en Europa
Get PDFThe Società Friulana di Archeologia Onlus is an association based in Friuli Venezia Giuia, founded in 1989. Membersof the association include professional archaeologists and local volunteers, who work together to protect and promote theirregional heritage. In 2012 two Italian archaeologists set up an exchange project to invite young students to come to Udine(Italy) to present their archaeological investigations to the local community. The results are published in an accessible articleon-line. The project Seguendo le tracce degli antichi is an innovative community archaeology venture that enables the exchangeof new research whilst promoting this small Italian region, historically a central meeting point in Europe.Programa "Severo Ochoa"La “Sociedad friulana de la arqueología Onlus” es una asociación que trabaja en Friuli Venezia Giulia desde el 1989.En 26 años de actividad, esta asociación arqueológica (hecha por profesionales y voluntarios locales), protege y promueve su patrimonio. Desde 2012 dos arqueólogas pusieron a punto un proyecto de intercambio que permite a los jóvenes estudiantes recién titulados de venir a Udine (Italia) para presentar su investigación arqueológica a la comunidad local. Los resultados se publican con un artículo y accesible en la red. El proyecto Seguendo e tracce degli antichi es una a propuesta innovadora que permite el intercambio de nuevas investigaciones y el descubrimiento de una pequeña región italiana que puede considerarse un punto de encuentro cultural en Europa
Asistencia al Embarazo y Parto Gemelar Hospital Universitario Central De Asturias
Get PDFProtocolo del Servicio de Obstetricia y Ginecología el HUCA. Área Sanitaria I
Characterization of Spanish ciders by means of chemical and olfactometric profiles and chemometrics
Get PDFEn este trabajo se ha realizado un estudio comparativo del aroma (composición volátil y perfiles olfatométricos) de las sidras asturiana y vasca en dos fases de maduración. Entre los principales compuestos volátiles, los alcoholes amílicos, lactato de etilo y acetato de etilo son cuantitativamente relevantes en todas las sidras estudiadas. La fracción minoritaria está formada principalmente por ácidos grasos, fenoles volátiles y alcoholes. Se construyeron tres modelos discriminantes PLS con bajos errores de predicción. Cuando se utilizó la composición volátil, las sidras pudieron diferenciarse por su maduración, estando el 4-etilcatecol fuertemente asociado a la sidra madura. Los perfiles olfatométricos permitieron clasificar las sidras en función de su origen y de su estado de maduración. Odorantes como el p-cresol y un componente de carácter dulce desconocido se correlacionaron con el origen de las sidras, mientras que la 1-octen-3-ona y un odorante desconocido de carácter especiado-vegetal están altamente correlacionados con el grado de maduración.A comparative study of the aroma (volatile composition and olfactometric profiles) of Asturian and
Basque still ciders in two maturation stages was conducted. Among the major volatile compounds, amyl
alcohols, ethyl lactate and ethyl acetate were quantitatively relevant in all of the ciders studied. The
minor fraction mainly consisted of fatty acids, volatile phenols and alcohols. Three PLS-discriminant
models with low prediction errors were constructed. When the volatile composition was used, ciders
could be differentiated by their maturation stage, 4-ethylcatechol being strongly associated to matured
ciders. The olfactometric profiles allowed the classification of ciders according to both their origin and
maturation stage. Odorants such as p-cresol and a sweet-character unknown component were correlated
to origin of ciders, whereas 1-octen-3-one and one unknown spicy-vegetal odorant were highly correlated to the maturation stage.Financial support for this work was managed by the National Institute of Research and Agro-Food Technology (INIA) with ERDF and ESF funds (projects RTA2009-00111; RTA2012-0075)
Improvement of the effective judicial protection of taxpayers in Spain in the light of comparative law
Get PDFEATLP 201
Influence of the carbonization temperature on the mechanical properties of thermoplastic polymer derived C/C-SiC composites
No full textCarbon/Carbon (C/C) composites derived from the thermoplastic polymer polyetherimide (PEI) were pyrolized up to 1000 °C, subsequently carbonized in inert atmosphere up to 2200 °C and afterwards infiltrated with liquid silicon. The investigation of fibers and matrix with Raman microspectroscopy revealed, that an increased carbonization temperature leads to an increased carbon order as well as an incipient stress-induced graphitization of the carbon matrix close to the fiber surfaces at 2200 °C. The derived C/C-SiC samples show a maximum flexural strength of 180 MPa with C/C composites treated at 2000 °C and monotonically increasing Young’s moduli ranging from 49 GPa with C/C preforms treated at 1600 °C up to 59 GPa after carbonization at 2200 °C. The carbon fiber strength was evaluated with a single fiber tensile test, which showed a monotonically increased Young’s modulus and a decrease of the strength after carbonization at 2200 °C.German Science Foundation DFG
Principado de Asturias-PCT
Si juegas hazlo con responsabilidad
No full textFolleto informativo a través del cual se fomenta el uso responsable de los juegos de azar
Presentación Biblioteca del HUCA
No full textPresentación de la Biblioteca del HUCA a los profesionales sanitariosBiblioteca del HUCA, una herramienta por descubri
Fichas de cultivos hortofrutícolas
No full textFichas de cultivo hortofrutícolas: cebolla, patata, zanahoria, ajo. Son fichas que reflejan la descripación de la planta, los requerimientos edafoclimáticos, material vegetal y variedades, calendario de cultivo, preparación del suelo, la fertilización, abonados, marco de plantación, riegos, plagas y enfermedades y recolección..