Browsing by Subject "Hydrogen"

Now showing items 1-20 of 108

    • 3D printed microstructured Au/TiO2 catalyst for hydrogen photoproduction 

      Elkoro Ugarteburu, Ander; Soler Turu, Lluís; Llorca Piqué, Jordi; Casanova Hormaechea, Ignasi (Elsevier, 2019-06-25)
      Article
      Open Access
      We successfully 3D printed Au/TiO2 monoliths for photogenerating hydrogen from water/ethanol gaseous mixtures under dynamic conditions. Monolith designs were printed by additive superposition of microfilaments of titania-based ...

    • 3D-Printed Co/YSZ catalyst for H2 production 

      Kiefer, Guillaume (Universitat Politècnica de Catalunya, 2022-02-14)
      Master thesis
      Restricted access - author's decision
      3D printing is a constantly improving manufacturing technique. Due to its improvement, more and more possibilities are offered to us. Starting with impression of polymers, the multitude of possibilities is now vast, and ...

    • 7 - Hydrogen production in microreactors 

      Soler Turu, Lluís; Jiménez Divins, Nuria; Vendrell Villafruela, Xavier; Serrano Carreño, M. Isabel; Llorca Piqué, Jordi (Elsevier, 2020-07-24)
      Part of book or chapter of book
      Restricted access - publisher's policy
      Catalytic microreactors constitute a crucial technology for process intensification in the production of hydrogen, particularly for on-site and/or onboard applications intended to feed fuel cells. This chapter describes ...

    • A direct Z-scheme for the photocatalytic hydrogen production from a water ethanol mixture on CoTiO3/TiO2 heterostructures 

      Xing, Congcong; Liu, Yongpeng; Zhang, Yu; Wang, Xiang; Guardia, Pablo; Yao, Liang; Han, Xu; Zhang, Ting; Arbiol Cobos, Jordi; Soler Turu, Lluís; Chen, Yufen; Sivula, Kevin; Guijarro, Néstor; Cabot, Andreu; Llorca Piqué, Jordi (2021-01-01)
      Article
      Open Access
      Photocatalytic H2 evolution from ethanol dehydrogenation is a convenient strategy to store solar energy in a highly valuable fuel with potential zero net CO2 balance. Herein, we report on the synthesis of CoTiO3/TiO2 ...

    • A hybrid strategy for mixed integer bi-level optimization applied to hydrogen energy supply chain management 

      Flores Pérez, José Manuel; Azzaro-Pantel, Catherine; Ponsich, Antonin Sebastien; Aguilar Lasserre, Alberto A. (2020)
      Conference report
      Restricted access - publisher's policy
      This paper addresses a supply chain management problem with consideration of production and distribution activities. The formulation is based on a mixed-integer bi-level programming approach as a mathematical model of the ...

    • A million-microchannel multifuel steam reformer for hydrogen production 

      Jiménez Divins, Nuria; Todorov Trifonov, Trifon; Rodríguez Martínez, Ángel; Llorca Piqué, Jordi (2020-05-05)
      Article
      Open Access
      A functionalized silicon micromonolith of 7 mm in diameter and 210 μm-thick was evaluated for the production of hydrogen from the steam reforming (SR) of various fuels, containing different functional groups, such as ...

    • Amorphous carbon modified nano-sized tungsten carbide as a gas diffusion electrode catalyst for the oxygen reduction reaction 

      Liu, Zhiwei; Li, Ping; Zhai, Fuqiang; Wan, Qi; Volinsky, Alex A.; Qu, Xuanhui (2015-01-01)
      Article
      Open Access
      Nanostructured tungsten carbide with high surface area and containing amorphous carbon is prepared by a low temperature combustion synthesis method. The nanostructured tungsten carbide is used as the catalyst in a gas ...

    • Analysis of valorization process of aluminum breakage scraps to obtain green hydrogen 

      Salueña Berna, Javier; Marin Genesca, Marc; Dagá Monmany, José María (Multidisciplinary Digital Publishing Institute (MDPI), 2021-04-06)
      Article
      Open Access
      In this article, it is proposed to use aluminum breakage scraps to obtain green hydrogen through the aluminum–water reaction with caustic soda as a catalyst with experimental research. From this exothermic reaction, both ...

    • Aplicabilidad de la producción catalítica de hidrógeno a partir de las aguas residuales en la industria de zumos de naranja 

      Meran Grullón, Angel (Universitat Politècnica de Catalunya, 2020-07-22)
      Master thesis
      Open Access
      Las aguas residuales procedentes de la industria de Zumos presentan una alta carga contaminante, debido al alto contenido de materia orgánica, sólidos en suspensión y variación de su pH, lo que hace viable y recomendable ...

    • Aprovechamiento de residuos de aluminio industrial para la obtención controlada de hidrógeno mediante la reacción aluminio-agua 

      Mujal-Rosas, Ramon Maria; Salueña Berna, Javier; Martínez López, Joan; Dagá Monmany, José María (2016-12-14)
      Article
      Open Access
      La aparición de vehículos que funcionan con pilas de combustible tipo PEM (membrana de intercambio de protones) plantea la necesidad de proporcionar hidrógeno de alta pureza de forma dosificada y a baja presión. ...

    • Assessment of integration of methane-reduced ceria chemical looping CO2/H2O splitting cycle to an oxy-fired power plant 

      Uddin, Azhar; Bose, Archishman; Boaro, Marta; Llorca Piqué, Jordi; Santarelli, Massimo (2020-02-28)
      Article
      Open Access
      In this paper, we investigated the effect of reaction kinetics and moving bed reactors for chemical looping (CO2/H2O) splitting unit (CL) that produces syngas and fed back to the power plant to gain the efficiency loss due ...

    • Assessment of oxygen production on the Moon through reduction of ilmenite 

      Jaime Albalat, Andrea (Universitat Politècnica de Catalunya, 2010-02-12)
      Master thesis
      Open Access
      In the past 20 years, considerable attention been paid to returning to our natural satellite with robotic and, eventually, manned mission(s) not only to continue one the most scientifically fruitful exploration programs ...

    • Bio-ethanol steam reforming and autothermal reforming in 3- m channels coated with RhPd/CeO2 for hydrogen generation 

      Divins, N.J.; López, Eduardo; Rodríguez Martínez, Ángel; Vega, Didac; Llorca Piqué, Jordi (2013-02)
      Article
      Restricted access - publisher's policy
      A silicon micromonolith of 7 mm diameter and 0.2 mm length containing 1.5 million regular channels with a diameter of 3.3 μm was used for obtaining hydrogen through ethanol or bio-ethanol steam reforming (ESR) and oxidative ...

    • Catalytic activity and characterization of Fe-Zn-Mg-Al hydrotalcites in biohydrogen production 

      Wimonsong, Pornthip; Llorca Piqué, Jordi; Nitisoravut, Rachnarin (2013-08-21)
      Article
      Restricted access - publisher's policy
      Four different M2þeMgeAl hydrotalcite (HT) materials were investigated for their effect on biohydrogen enhancement, where M2þ is Fe and/or Zn. HTs were synthesized by the coprecipitation method and characterized by ...

    • Catalytic reforming of dimethyl ether in microchannels 

      Ledesma Rodriguez, Cristian; López, Eduardo; Trifonov, T.; Rodríguez Martínez, Ángel; Llorca Piqué, Jordi (2018-03-09)
      Article
      Open Access
      The steam reforming and oxidative steam reforming of dimethyl ether (DME) were tested at 573–773¿K over a CuZn/ZrO2 catalyst in microreactors with three different types of channels: ceramic square channels with side lengths ...

    • Catalytic steam reforming of olive mill wastewater for hydrogen production 

      Casanovas, A.; Galvis, A; Llorca Piqué, Jordi (2015-06-29)
      Article
      Open Access
      Catalytic honeycombs functionalized with lanthanum-stabilized ceria as catalytic support and impregnated with different metals (Rh, Ru, Pt, Pd and Ni) were prepared and tested for hydrogen production through the steam ...

    • Chelating agent effects in the synthesis of supported Ni nanoparticles as catalysts for hydrogen production 

      Villagran Olivares, Alejandra C.; Barroso, Mariana Noelia; López, Carlos Alberto; Llorca Piqué, Jordi; Abello, María Cristina (Elsevier, 2021-07-25)
      Article
      Restricted access - publisher's policy
      A series of Ni supported over MgAl2O4–CeO2 catalysts have been prepared by the wet impregnation method as catalysts for steam ethanol reforming. The synthesis was performed using nitrilotriacetic acid (NTA) or citric acid ...

    • CO preferential oxidation under H-2-rich streams on copper oxide supported on Fe promoted CeO2 

      Barbato, P.S.; Colussi, Sara; Di Benedetto, A.; Landi, Giada; Lisi, L.; Llorca Piqué, Jordi; Trovarelli, Alessandro (2015-10-05)
      Article
      Open Access
      In this work the effect of Fe addition to copper/ceria catalysts on the catalytic activity toward CO-PROX reaction has been studied and related to the modification of textural and redox properties induced by iron. Catalysts ...

    • Cobalt hydrotalcites as catalysts for bioethanol steam reforming. The promoting effect of potassium on catalyst activity and long-term stability 

      Espinal, Raul; Taboada, E.; Molins, E.; Chimentao, Ricardo J; Medina, Francisco; Llorca Piqué, Jordi (2012-10-30)
      Article
      Restricted access - publisher's policy
      Cobalt hydrotalcite-derived catalysts, doped with potassium, are active materials for the ethanol steam reforming reaction. Potassium addition reduces the acid sites number and strength. It acts as a promoter of the ethanol ...

    • Colloidal Ni2-: XCoxP nanocrystals for the hydrogen evolution reaction 

      Liu, Junfeng; Wang, Zhenxing; David, Jeremy; Llorca Piqué, Jordi (Royal Society of Chemistry (RSC), 2018-05-11)
      Article
      Open Access
      A cost-effective and scalable approach was developed to produce monodisperse Ni2-xCoxP nanocrystals (NCs) with composition tuned over the entire range (0 = x = 2). Ni2-xCoxP NCs were synthesized using low-cost, stable and ...