Prozesu Katalitikoak eta Hondakinen Balioztatzea

Ikerketa Taldea

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Abstract: The steam gasification of pinewood sawdust derived char has been studied in a conical spouted bed reactor. The effect temperature (in the 800–900 °C range), steam partial pressure (from 0.2 to 1) and sawdust particle size (0.3–1, 1–2 and 2–4 mm ranges) have on the char gasification kinetics has been determined. The pyrolysis step was performed in situ prior to the gasification...

Abstract: Sewage sludge fast pyrolysis bio-oil, produced in a conical spouted bed reactor (CSBR) in the 450–600 °C range, has been characterized. On the one hand, the effect of temperature on bio-oil composition has been analyzed by means of online chromatography and, furthermore, the ultimate analysis and the higher heating value of each liquid have been determined. On the other hand,...

Abstract: This work focuses the valorization by CO2 activation of the sewage sludge char obtained in the fast pyrolysis in a conical spouted bed reactor at 500 °C. In order to improve the quality of the activated material for use as adsorbent, the sewage sludge char was subjected to two sequential steps of washing by using first a solution of HCl (in order to remove part of the ashes)...

Abstract: Catalytic steam reforming of n-hexane, 1-hexene, tetradecane and toluene over a Ni commercial catalyst has been carried out in a fluidized bed reactor at 700 °C. These compounds have been selected as model compounds of the volatiles formed in the pyrolysis of waste plastics in order to study in detail the performance of the catalyst in the pyrolysis-reforming of different...

Abstract: The kinetic behavior of CuFe2O4/γ-Al2O3 bifunctional catalyst is studied in the steam reforming of dimethyl ether (SRD) under reaction-regeneration cycles in a fluidized-bed reactor, in the 200–400 °C range for the reaction step and with coke combustion with air at 500 °C for the regeneration step. Results in the SRD process show that, in order to attain a reproducible and...

Abstract: The kinetic behavior of noble metal catalysts (Pt and Rh supported on Al2O3/CeO2 mixed oxides) and of Cu catalysts (conventional CuO–ZnO–Al2O3 (CZA) catalyst and CuFe2O4 spinel) has been compared in methanol steam reforming, which is the second step in the steam reforming of dimethyl ether (SRD). To ascertain the adequacy of these catalysts for use as metallic function in the...

Abstract: This study aims at optimizing the composition of the bifunctional catalyst with CuFe2O4 spinel metallic function for the steam reforming of DME (SRD). The γ-Al2O3 obtained by calcination of boehmite at 550 °C proves to be the most suitable acid function, given that it provides high activity for DME hydrolysis and avoids hydrocarbon formation in the 300–400 °C range....

Abstract: A study is conducted on the effect the operating variables (temperature, space-time, steam/DME molar ratio, DME partial pressure) have on DME steam reforming over CuFe2O4/γ-Al2O3 bifunctional catalyst in order to obtain high H2 yield with minimum deactivation by coke. The experiments were carried out in a fluidized bed reactor under the following operating conditions: 250–400...

Abstract: A high-pressure fixed-bed reactor has been used for the direct synthesis of dimethyl ether (DME) from syngas, through a single-step process using a CuO-ZnO-MnO/SAPO-18 (CZMn/S) bifunctional catalyst. The effects of temperature (250–350 °C), space time (2.5–20 gcat h (molC)−1), reaction pressure (20–40 bar) and time on stream have been studied. The results show that suitable...

New paper in Chem. Eng. J. Abstract: Kinetics of the steam reforming of dimethyl ether (SRD) over a novel CuFe2O4/γ-Al2O3 bifunctional catalyst are investigated in a fluidized bed reactor under the following operating conditions: temperature, 250–400 °C; steam to DME ratio (S/DME), 3–8; space time, 0.1–2.3 gcatalysth(gcarbon)−1. A kinetic scheme with three different reaction steps (DME...