Browsing Artículos by Author "Gayubo Cazorla, Ana Guadalupe"
Now showing items 1-20 of 27
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Catalysts of Ni/α-Al2O3 and Ni/La2O3-αAl2O3 for hydrogen production by steam reforming of bio-oil aqueous fraction
Valle Pascual, Beatriz; Remiro Eguskiza, Aingeru; Aguayo Urquijo, Andrés Tomás ; Bilbao Elorriaga, Javier; Gayubo Cazorla, Ana Guadalupe (Elsevier, 2012-12-04)This paper reports on the steam reforming, in continuous regime, of the aqueous fraction of bio-oil obtained by flash pyrolysis of lignocellulosic biomass (sawdust). The reaction system is provided with two steps in series: ... -
Coking and sintering progress of a Ni supported catalyst in the steam reforming of biomass pyrolysis volatiles
Ochoa, Aitor; Arregi Joaristi, Aitor; Amutio Izaguirre, Maider; Gayubo Cazorla, Ana Guadalupe; Olazar Aurrecoechea, Martin ; Bilbao Elorriaga, Javier; Castaño Sánchez, Pedro (Elsevier, 2018-10)The valorization of biomass (pine wood) for hydrogen production has been studied in a two-step process, comprising pyrolysis and subsequent steam reforming of the volatiles produced in the first step. This work focuses ... -
Combined effect of bio-oil composition and temperature on the stability of Ni spinel derived catalyst for hydrogen production by steam reforming
García Gómez, Naiara; Valecillos Díaz, José del Rosario; Valle Pascual, Beatriz; Remiro Eguskiza, Aingeru; Bilbao Elorriaga, Javier; Gayubo Cazorla, Ana Guadalupe (Elsevier, 2022-10)A challenge for scaling up hydrogen production by raw bio-oil steam reforming (SR) is the rapid catalyst deactivation that is strongly sensitive to the temperature and bio-oil composition. This work studies the combined ... -
Comparison of Ni based and Rh based catalysts performance in the oxidative steam reforming of raw bio-oil
Remiro Eguskiza, Aingeru; Arandia Gutiérrez, Aitor; Bilbao Elorriaga, Javier; Gayubo Cazorla, Ana Guadalupe (ACS, 2017-06-17)The effect of O2 content in the oxidative steam reforming (OSR) of raw bio-oil has been studied, and the kinetic behavior, particularly deactivation, has been compared between two catalyst (Ni/La2O3-αAl2O3 and Rh/CeO2-ZrO2). ... -
Comparison of the NiAl2O4 derived catalyst deactivation in the steam reforming and sorption enhanced steam reforming of raw bio-oil in packed and fluidized-bed reactors
Landa Bilbao, Leire; Valecillos Díaz, José del Rosario; Remiro Eguskiza, Aingeru; Valle Pascual, Beatriz; Bilbao Elorriaga, Javier; Gayubo Cazorla, Ana Guadalupe (Elsevier, 2023-02)The choice of appropriate reactors and reforming strategies is key to make progresses on scaling up H2 production processes from raw bio-oil. This work compares the performance (conversion, product yields and deactivation) ... -
Cost-effective upgrading of biomass pyrolysis oil using activated dolomite as a basic catalyst
Valle Pascual, Beatriz; García Gómez, Naiara; Remiro Eguskiza, Aingeru; Gayubo Cazorla, Ana Guadalupe; Bilbao Elorriaga, Javier (Elsevier B.V., 2019-07-19)This study deals with a continuous process on a calcined dolomite operating at atmospheric pressure and by cofeeding water for cost-effective upgrading of raw bio-oil at 400 °C and 500 °C. The distribution of carbon in ... -
Deactivation kinetics for the conversion of dimethyl ether to olefins over a HZSM-5 zeolite catalyst
Pérez Uriarte, Paula; Ateka Bilbao, Ainara; Gayubo Cazorla, Ana Guadalupe; Cordero Lanzac, Tomás; Aguayo Urquijo, Andrés Tomás ; Bilbao Elorriaga, Javier (2016-11-16)A deactivation kinetic equation for the conversion of dimethyl ether (DME) to olefins (DTO process) has been established. The catalyst has been prepared with a HZSM-5 zeolite (SiO2/Al2O3 ratio of 280) agglomerated with ... -
Deactivation of Ni spinel derived catalyst during the oxidative steam reforming of raw bio-oil
Arandia Gutiérrez, Aitor; Remiro Eguskiza, Aingeru; Oar Arteta, Lide; Bilbao Elorriaga, Javier; Gayubo Cazorla, Ana Guadalupe (Elsevier, 2020-05-12)Deactivation of a bulk catalyst derived from NiAl2O4 spinel during the oxidative steam reforming (OSR) of raw bio-oil has been studied. The experiments were performed in a continuous system with two units in series: a ... -
Effect of calcination/reduction conditions of Ni/La2O3–αAl2O3 catalyst on its activity and stability for hydrogen production by steam reforming of raw bio-oil/ethanol
Valle Pascual, Beatriz; Aramburu Ortega, Borja; Remiro Eguskiza, Aingeru; Bilbao Elorriaga, Javier; Gayubo Cazorla, Ana Guadalupe (Elsevier, 2014-04-05)The influence of calcination and reduction temperatures of Ni/La2O3–αAl2O3 catalyst used in the steam reforming of raw bio-oil was studied in the 550–850 °C range. The experiments were conducted by continuously feeding a ... -
Effect of reaction conditions on the deactivation by coke of a NiAl2O4 spinel derived catalyst in the steam reforming of bio-oil
García Gómez, Naiara; Valecillos Díaz, José del Rosario; Remiro Eguskiza, Aingeru; Valle Pascual, Beatriz; Bilbao Elorriaga, Javier; Gayubo Cazorla, Ana Guadalupe (Elsevier, 2021-11-15)[EN]The steam reforming of bio-oil is a promising and economically feasible technology for the sustainable H-2 production, yet with the main challenge of designing highly active and stable catalysts. This work aimed to ... -
Global Vision of the Reaction and Deactivation Routes in the Ethanol Steam Reforming on a Catalyst Derived from a Ni–Al Spinel
Iglesias Vázquez, Sergio; Valecillos Díaz, José del Rosario; Remiro Eguskiza, Aingeru; Valle Pascual, Beatriz; Bilbao Elorriaga, Javier; Gayubo Cazorla, Ana Guadalupe (ACS, 2024-04)Ethanol steam reforming (ESR) over a Ni/Al2O3 catalyst prepared by reduction of a NiAl2O4 spinel is a promising alternative route to produce H2 from biomass. This work deepens into the effect of reaction conditions (450–650 ... -
Hydrogen production by steam reforming of bio-oil/bio-ethanol mixtures in a continuous thermal-catalytic process
Remiro Eguskiza, Aingeru; Valle Pascual, Beatriz; Oar Arteta, Lide; Aguayo Urquijo, Andrés Tomás ; Bilbao Elorriaga, Javier; Gayubo Cazorla, Ana Guadalupe (Elsevier, 2014-04-24)The feasibility of the steam reforming of bio-oil aqueous fraction and bio-ethanol mixtures has been studied in a continuous process with two in-line steps: thermal step at 300 ºC (for the controlled deposition of pyrolytic ... -
Insights into the Reaction Routes for H2 Formation in the Ethanol Steam Reforming on a Catalyst Derived from NiAl2O4 Spinel
Valecillos Díaz, José del Rosario; Iglesias Vázquez, Sergio; Landa Bilbao, Leire; Remiro Eguskiza, Aingeru; Bilbao Elorriaga, Javier; Gayubo Cazorla, Ana Guadalupe (American Chemical Society, 2021-11-04)[EN]This work describes the satisfactory performance of a Ni/Al2O3 catalyst derived from NiAl2O4 spinel in ethanol steam reforming and focuses on studying the prevailing reaction routes for H-2 formation in this system. ... -
On the dynamics and reversibility of the deactivation of a Rh/CeO2-ZrO2 catalyst in raw bio-oil steam reforming
Remiro Eguskiza, Aingeru; Ochoa, Aitor; Arandia Gutiérrez, Aitor; Castaño Sánchez, Pedro; Bilbao Elorriaga, Javier; Gayubo Cazorla, Ana Guadalupe (Elsevier, 2019-01-28)The deactivation mechanism of a commercial Rh/CeO2-ZrO2 catalyst in raw bio-oil steam reforming has been studied by relating the evolution with time on stream of the bio-oil conversion and products yields and the physicochemical ... -
Operating conditions for attenuating Ni/La2O3-αAl2O3 catalyst deactivation in the steam reforming of bio-oil aqueous fraction
Remiro Eguskiza, Aingeru; Valle Pascual, Beatriz; Aguayo Urquijo, Andrés Tomás ; Bilbao Elorriaga, Javier; Gayubo Cazorla, Ana Guadalupe (Elsevier, 2013-07-16)A study was carried out on the effect of temperature (in the 500–800 °C range) and space–time (between 0.10 and 0.45 gcatalyst h(gbio-oil)− 1) on Ni/La2O3–αAl2O3 catalyst deactivation by coke deposition in the steam reforming ... -
Optimum Operating Conditions in Ethanol Steam Reforming over a Ni/La2O3-αAl2O3 catalyst in a Fluidized Bed Reactor
Montero, Carolina; Remiro Eguskiza, Aingeru; Benito, Pedro Luis; Bilbao Elorriaga, Javier; Gayubo Cazorla, Ana Guadalupe (Elsevier, 2018-01-01)This manuscript analyzes the steam reforming of ethanol (SRE) over a Ni/La2O3-Al2O3 catalyst in a fluidized bed reactor under a wide range of operating conditions (500-650 ºC, space time up to 0.35 gcatalysth/gEtOH, and ... -
Origin and nature of coke in ethanol steam reforming and its role in deactivation of Ni/La2O3-αAl2O3 catalyst
Montero, Carolina; Remiro Eguskiza, Aingeru; Valle Pascual, Beatriz; Oar Arteta, Lide; Bilbao Elorriaga, Javier; Gayubo Cazorla, Ana Guadalupe (ACS, 2019-07-22)Deactivation of Ni/La2O3-αAl2O3 catalyst in the ethanol steam reforming (ESR) was studied in order to establish the optimal conditions for maximizing H2 production and achieving a steady behaviour. The ESR reactions were ... -
Oxidative Steam Reforming of Raw Bio-Oil over Supported and Bulk Ni Catalysts for Hydrogen Production
Arandia Gutiérrez, Aitor; Remiro Eguskiza, Aingeru; García, Verónica; Castaño Sánchez, Pedro; Bilbao Elorriaga, Javier; Gayubo Cazorla, Ana Guadalupe (MDPI, 2018-08)Several Ni catalysts of supported (on La2O3-alpha Al2O3, CeO2, and CeO2-ZrO2) or bulk types (Ni-La perovskites and NiAl2O4 spinel) have been tested in the oxidative steam reforming (OSR) of raw bio-oil, and special attention ... -
Performance of NiAl2O4 spinel derived catalyst + dolomite in the sorption enhanced steam reforming (SESR) of raw bio-oil in cyclic operation
Landa Bilbao, Leire; Remiro Eguskiza, Aingeru; Valecillos Díaz, José del Rosario; Valle Pascual, Beatriz; Bilbao Elorriaga, Javier; Gayubo Cazorla, Ana Guadalupe (Elsevier, 2024-03)The production of H2 from raw bio-oil with high yield and purity requires the development of reforming technologies with low energy requirements, minimized CO2 emissions, and stable and regenerable catalysts. This work ... -
Reaction conditions effect and pathways in the oxidative steam reforming of raw bio-oil on a Rh/CeO2-ZrO2 catalyst in a fluidized bed reactor
Arandia Gutiérrez, Aitor; Remiro Eguskiza, Aingeru; Oar Arteta, Lide; Bilbao Elorriaga, Javier; Gayubo Cazorla, Ana Guadalupe (Elsevier, 2017-12-07)A reaction scheme has been proposed for the oxidative steam reforming (OSR) of raw bio-oil on a Rh/CeO2-ZrO2 catalyst, based on the study of the effect reaction conditions (temperature, space time, oxygen/carbon ratio and ...