Gas-solid conversion in fluidised bed reactors

Asimplified model for gas–solid reactions in fluidised bed (FB) is proposed. Such models already exist for catalytic gas–solid reactions (CGSRs), providing general description of the system in terms of main governing parameters. Expansion of this approach to non-catalytic gas–solid reactions (NCGSRs) is difficult, because the solid reactant takes part in the reaction. Therefore, FB reactor models for NCGSR are usually devised only for specific cases, and a general analysis has not been presented up to date. The present model allows analysis of different types of NCGSR in a generalised way, handling catalytic reactions as a particular, simpler, case. It is shown that the reactor behaviour can be described by three governing dimensionless parameters. Two additional parameters, quantifying the importance of diffusion effects in single particles are also identified, and their impact on reactor behaviour is analysed. Possible simplifications are explored. Model limitations, that is, assumption of isothermal bed and particle and the occurrence of only one reaction, are discussed. Examples are outlined to show the applicability of the methodPublicad

Production of small peptides and low molecular weight amino acids by subcritical water from fish meal: Effect of pressurization agent and temperature

Trabajo presentado en: 19th European meeting on Supercritical Fluids (EMSF 2023), organized by the International Society for the Advancement of Supercritical Fluids, Budapest, 21-24 may, 2023Fish meal is a by-product obtained in the marine food industry that is actually used in aquaculture and pet-food industry. It presents a high protein content as well as a valuable lipid fraction composition. The protein fraction from marine origin has a high nutritional value and a great amino acid profile. In order to improve the use of this by-product, more sustainable forms of exploiting it must be considered and the products obtained more useful.This work was supported by the AEI [grant numbers PID2019-104950RB-I00, PID2020-116716RJ-I00, TED2021-129311B-I00, PDC2022-133443-I00] and the JCyL and the ERDF [grant number BU050P20]. P. Barea predoctoral contract was funded by JCyL and the European Social Fund (ESF) by ORDEN EDU/1868/2022, de 19 de diciembre. P. Alonso-Riaño predoctoral contract was funded by JCyL and the European Social Fund (ESF) by ORDEN EDU/556/2019, de 5 de junio. R. Melgosa contract was funded by a Beatriz Galindo Research Fellowship [BG20/00182]. A. Bermejo López acknowledges the Margarita Salas grant (MARSA22/03)

2-DE analysis of sera protein expression profiles in early stages of human neonatal development. A preliminary study.

Comunicaciones a congreso

Lactic acid production from biomass-derived sugars using acid or base catalysts

Póster presentado en: 19th European meeting on Supercritical Fluids (EMSF 2023), organized by the International Society for the Advancement of Supercritical Fluids, Budapest, 21-24 may, 2023Lactic acid can be produced from biomass-derived sugars, both with basic and acid catalysts, and is a stable system, as no degradation of the produced lactic acid is observed over timeThis work was supported by AEI [PID2019-104950RB-I00, PID2020-116716RJ-I00, TED2021-129311B-I00, PDC2022-133443-I00] and JCyL-ERDF [BU050P20]. ABL wants to acknowledge the Margarita Salas grant [MARSA22/03], PAR to JCyL and ESF [ORDEN EDU/556/2019] and RM the Beatriz Galindo Research Fellowship [BG20/00182]

Aproximación Proteómica al síndrome de apneas-hipopneas del sueño

Comunicaciones a congreso

Revista de Vertebrados de la Estación Biológica de Doñana

The Osteology of Barbus bocagei (Steindachner, 1866) (Pisces: Cyprinidae).El crecimiento del Cacho (Leuciscus cephalus pyraenaicus Günther, 1862) en el rio Jarama (cuenca del Tajo)Contribución al estudio de la bermejuela, Rutilus arcasi, Steindachner 1866 de la cuenca del Júcar (Osteichthyes: Cyprinidae) 1. MorfometríaDimensiones, estructura, forma y disposición en la cavidad de los nidos de Corvus monedula.Variaciones altitudinales en la composición de las comunidades nidificantes de aves de Sierra Nevada (Sur de España)Ecomorfología de una comunidadde Passeriformes en la Sierra de Cazorla, SE de EspañaLa Distribución del pez-sol (Lepolllis gibbostlS L.) en la Península IbéricaSobre la distribución de Barbus haasi (OSTARIOPHYSI: CYPRINIDAE)La Distribución de Barbus bocagei STEINDACHNER, 1865 (OSTARIOPHYSI: CYPRINIDAE) en la Península IbéricaLighy effects on circadian locomotor activity of Lacerta lepida under constant temperatureEvaluación de diferentes métodos para estimar el área de campeo de dos especies de iguánidos.Un Casal de Cartaxo-Nottenho (Saxicola rubetra) a criar em Portugal.Nidificación de Passer hispaniolensis en antiguos nidos de Dendrocopos major thanneri.Observación de un lince ibérico (Lynx pardina) en la provincia de Lugo. Norte de España.El Visón americano, Mustela vison SCHREBER, 1777 (MAMMALIA, MUSTELIDAE) en Cataluña, N.E. de la Península Ibérica.Peer reviewe

Municipal distribution of ovarian cancer mortality in Spain

<p>Abstract</p> <p>Background</p> <p>Spain was the country that registered the greatest increases in ovarian cancer mortality in Europe. This study describes the municipal distribution of ovarian cancer mortality in Spain using spatial models for small-area analysis.</p> <p>Methods</p> <p>Smoothed relative risks of ovarian cancer mortality were obtained, using the Besag, York and Molliè autoregressive spatial model. Standardised mortality ratios, smoothed relative risks, and distribution of the posterior probability of relative risks being greater than 1 were depicted on municipal maps.</p> <p>Results</p> <p>During the study period (1989–1998), 13,869 ovarian cancer deaths were registered in 2,718 Spanish towns, accounting for 4% of all cancer-related deaths among women. The highest relative risks were mainly concentrated in three areas, i.e., the interior of Barcelona and Gerona (north-east Spain), the north of Lugo and Asturias (north-west Spain) and along the Seville-Huelva boundary (in the south-west). Eivissa (Balearic Islands) and El Hierro (Canary Islands) also registered increased risks.</p> <p>Conclusion</p> <p>Well established ovarian cancer risk factors might not contribute significantly to the municipal distribution of ovarian cancer mortality. Environmental and occupational exposures possibly linked to this pattern and prevalent in specific regions, are discussed in this paper. Small-area geographical studies are effective instruments for detecting risk areas that may otherwise remain concealed on a more reduced scale.</p

CO2 gasification of chars prepared from wood and forest residue

The CO2 gasification of chars prepared from Norway spruce and its forest residue was investigated in a thermogravimetric analyzer (TGA) at slow heating rates. The volatile content of the samples was negligible; hence the gasification reaction step could be studied alone, without the disturbance of the devolatilization reactions. Six TGA experiments were carried out for each sample with three different temperature programs in 60 and 100% CO2. Linear, modulated, and constant-reaction rate (CRR) temperature programs were employed to increase the information content available for the modeling. The temperatures at half of the mass loss were lower in the CRR experiments than in the other experiments by around 120 degrees C. A relatively simple, well-known reaction kinetic equation described the experiments. The dependence on the reacted fraction as well as the dependence on the CO2, concentration were described by power functions (n-order reactions). The evaluations were also carried out by assuming a function of the reacted fraction that can mimic the various random pore/random capillary models. These attempts, however, did not result in an improved fit quality. Nearly identical activation energy values were obtained for the chars made from wood and forest residues (221 and 218 kJ/mol, respectively). Nevertheless, the forest residue char was more reactive; the temperatures at half of the mass loss showed 20-34 degrees C differences between the two chars at 10 degrees C/min heating rates. The assumption of a common activation energy, E, and a common reaction order, v, on the CO2, concentration for the two chars had only a negligible effect on the fit quality