Catalytic Processes & Waste Valorization

Nuestro objetivo es el desarrollo de nuevos procesos térmicos y catalíticos, o de la adaptación y mejora de los ya implantados industrialmente, para obtener combustibles y productos químicos de valor añadido. Partiendo de residuos, materias primas alternativas al petróleo o fracciones de interés secundario del mismo y trabajando en rutas de transformación que preservan el medio ambiente. Nuestras actividades están encaminadas a obtener resultados de excelencia y de interés social y económico, dando respuesta a los retos referentes a la energía y sostenibilidad. Para ello, se estudian los procesos a diferentes niveles, desde la escala microscópica de los fenómenos físicos y químicos implicados, hasta la de diseño y escalado a plantas de demostración, buscando la mejora en las facetas de conocimiento fundamental y metodológico, modelado cinético, y diseño y simulación de las unidades de proceso.

Title: Influence of contactor geometry and draft tube configuration on the cycle time distribution in sawdust conical spouted beds Abstract: A study has been carried out on the influence the draft-tube configuration has on the solid circulation in conical spouted beds made up of sawdust. Knowledge on the performance of these fine particles of low density and irregular texture is...

Abstract: This work studies the mechanism of coke deactivation of a Ni/La2O3–αAl2O3 catalyst in ethanol steam reforming conducted in a fluidized bed reactor under conditions of severe deactivation, at 500 °C. Deactivation takes place in three consecutive stages with time on stream, corresponding to increasing values of ethanol concentration in the reaction system and decreasing values...

Abstract: The hydrocracking of hydrotreated scrap tires pyrolysis oil (HT-STPO) has been studied aiming at high-quality refinery blends for alternative automotive fuels. The hydrocracking runs have been carried out with a PtPd/SiO2-Al2O3 catalyst in a fixed-bed reactor at 440–500 °C, 65 bar and space time of 0.16 h. The catalyst has been characterized by inductively coupled plasma...

Abstract: The upgrading of Scrap Tire Pyrolysis Oil (STPO) has been studied in order to remove undesired sulfur, nitrogen and unsaturated compounds while improving the properties of its different fractions (naphtha, diesel and gasoil) toward being used as a potential blend in the refinery. The studied catalysts are NiMo supported on 5 porous materials: γ-Al2O3 (ALM catalyst), SiO2–Al2O3...

Abstract The effects of superficial gas velocity, bed composition and other operating parameters on bed hydrodynamics and bed-to-surface heat transfer were investigated the influence of bed height and gas velocity sawdust, sand and 30–70, 40–60 and 50–50 mixtures of biomass and sand in a conical spouted bed. Experiments were performed at minimum spouting velocity and 10 and 20% above this....

El próximo 16 de julio a las 11:30 en la Sala Anexa al Paraninfo de la ZTF-FCT, Paula Pérez defenderá la Tesis Doctoral titulada "Proceso Catalítico de Transformación de Dimetil Éter en Olefinas (DTO)", realizada bajo la dirección de los Prof. Andrés T. Aguayo y Javier Bilbao.

Abstract Poplar (Populus nigra) flash pyrolysis has been performed at the IK4-Ikerlan 25 kg h− 1 pilot plant equipped with a conical spouted bed reactor. Gas, bio-oil and char yields and properties have been studied in the 425–525 °C range. This reactor has been proven to be especially suitable for this process as high bio-oil yields have been obtained, with the maximum being 69 wt.% at 455...

Abstract Sewage sludge valorization by flash pyrolysis has been carried out in a conical spouted bed reactor with continuous biomass feed and char removal. The effect of temperature on product yields and composition has been studied in the 450–600 °C range and a maximum liquid yield of 77 wt.% daf (dry and ash free basis) has been obtained at 500 °C. The liquid collected has a water content...

Abstract The steam gasification of different mixtures of biomass and high density polyethylene (0 wt%, 25%, 50% and 100% of HDPE) has been carried out in continuous mode in a conical spouted bed gasifier, and the results have been compared with those obtained feeding pure biomass and HDPE. The experiments have been carried out at 900 °C and using a steam/(biomass + plastic) mass ratio of 1....

Abstract The rice husk char gasification kinetics with carbon dioxide has been studied in a thermogravimetric analyzer (TGA) under isothermal and dynamic regimes. The effect of the carbon dioxide concentration (50, 75, and 100 vol %) and heating rate (5, 10, and 20 °C min–1) was determined in the dynamic runs, and the effect of the temperature (750, 800, and 850 °C) was determined in the...