Now showing items 21-40 of 263

    • An efficient and reusable catalyst based on Pd/CeO2 for the room temperature aerobic Suzuki–Miyaura reaction in water/ethanol 

      Amoroso, Francesco; Colussi, Sara; Del Zotto, Alessandro; Llorca Piqué, Jordi; Trovarelli, Alessandro (2010)
      Article
      Restricted access - publisher's policy
      The Pd/CeO2 system behaves as an efficient precatalyst for the Suzuki–Miyaura cross-coupling under mild conditions (298 K, in air) in ethanol/water. A broad range of aryl bromides, including those deactivated, and ...
    • Anaerobic co-digestion of acetate-rich with lignin-rich wastewater and the effect of hydrotalcite addition 

      Rodriguez Chiang, Lourdes Maria; Llorca Piqué, Jordi; Dahl Olli, Peka (2016-10-01)
      Article
      Open Access
      The methane potential and biodegradability of different ratios of acetate and lignin-rich effluents from a neutral sulfite semi-chemical (NSSC) pulp mill were investigated. Results showed ultimate methane yields up to 333 ...
    • Application of Fe-Zn-Mg-Al-O hydrotalcites supported Au as active nano-catalyst for fermentative hydrogen production 

      Wimonsong, Pornthip; Nitisoravut, Rachnarin; Llorca Piqué, Jordi (2014-10-01)
      Article
      Restricted access - publisher's policy
      Four different Au/Fe-Zn-Mg-Al-O hydrotalcites (HTs) supported Au catalysts were synthesized by the incipient impregnation method and characterized by X-ray photoelectron spectroscopy and scanning electron microcopy. ...
    • Assessment of integration of methane-reduced ceria chemical looping CO2/H2O splitting cycle to an oxy-fired power plant 

      Farooqui, Azharuddin; Bose, Archishman; Boaro, Marta; Llorca Piqué, Jordi; Santarelli, Massimo (2020-02-28)
      Article
      Restricted access - publisher's policy
      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 kinetic model for ceria oxidation for chemical-looping CO2 dissociation 

      Farooqui, A.E.; Manfredi Pica, A.; Marocco, P.; Ferrero, D.; Lanzini, A.; Fiorilli, S.; Llorca Piqué, Jordi; Santarelli, M. (2018-08-15)
      Article
      Open Access
      Chemical looping technologies are identified as to have an excellent potential for CO2 capture and fuels synthesis. Oxygen carriers are the fundamental component of a chemical looping process, and the choice of stable and ...
    • Au/TiO2 Lyogels for Hydrogen Production 

      Molins, Elies; Benito, Mónica; Mata, Ignasi; Martínez, Lester; Soler Turu, Lluís; Llorca Piqué, Jordi (Cambridge University Press, 2017-05-15)
      Article
      Restricted access - author's decision
      Au/TiO2 lyogels have been prepared by sol-gel process followed by freeze-drying and calcination in order to induce crystallization. In the synthesis, a dispersion of AuNPs was added either during the sol-gel process or ...
    • 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 ...
    • Bio-nanohybrid catalysts based on L-leucine immobilized in hydrotalcite and their activity in aldol reaction 

      Crivoi, Dana-Georgiana; Miranda, Ronald Alexander; Finocchio, Elisabetta; Llorca Piqué, Jordi; Ramis, Gianguido; Sueiras, Jesus Eduardo; Segarra González, Anna Maria; Medina Mena, Francisco (2016-06-05)
      Article
      Open Access
      Nanohybrid materials based on L-leucine (L-Leu) and hydrotalcites (HT) were prepared by the ion exchange and reconstruction method, under mild synthesis conditions. The location, amount and the form of the immobilized L-Leu ...
    • Boosted CO2 reaction with methanol to yield dimethyl carbonate over Mg–Al hydrotalcite-silica lyogels 

      Stoian, D.C.; Taboada, E.; Llorca Piqué, Jordi; Molins, E.; Medina, F.; Segarra, A.M. (2013-05-13)
      Article
      Restricted access - publisher's policy
      Nonimmobilized and immobilized Mg–Al hydrotalcite-like materials on silica lyogels were prepared and activated by calcination to be tested as catalysts in the direct carboxylation reaction of methanol. The HTs supportedon ...
    • Carbonaceous catalysts from orange pulp for limonene oxidation 

      Wróblewska, Agnieszka; Serafin, Jaroslaw; Gawarecka, Alicja; Miadlicki, Piotr; Urbas, Karolina; Koren, Zvi C.; Llorca Piqué, Jordi; Michalkiewicz, Beata (2019-01-01)
      Article
      Open Access
      The possibility of orange pulp utilization for nanoporous carbons production was investigated. Moreover, processing the obtained materials as limonene oxidation catalysts was studied as well. Limonene was separated from ...
    • 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 ammonia decomposition for hydrogen production on Ni, Ru and Ni–Ru supported on CeO2 

      Lucentini, Ilaria; Casanovas Grau, Albert; Llorca Piqué, Jordi (2019-05-13)
      Article
      Restricted access - publisher's policy
      Ceria-supported Ni, Ru and NiRu catalysts have been tested in the catalytic decomposition of ammonia to yield hydrogen and their performance in long-term tests has been compared to alumina-supported Ni and Ru samples. The ...
    • Catalytic membrane reactors based on macroporous silicon for hydrogen production 

      Vega Bru, Didac; Hernández Díaz, David; López, E.; Jiménez, Nuria; Todorov Trifonov, Trifon; Rodríguez Martínez, Ángel; Alcubilla González, Ramón; Llorca Piqué, Jordi (2010)
      Conference report
      Open Access
      The typology of using hydrogen as an energy carrier and its implementation in portable fuel cells has motivated a considerable research interest in the development of new efficient hydrogen production technologies. Hydrogen ...
    • Catalytic performance of bulk and Al2O3-supported molybdenum oxide for the production of biodiesel from oil with high free fatty acids content 

      Navajas León, Alberto; Reyero, I.; Jiménez Barrera, Elena; Romero Sarria, Francisca; Llorca Piqué, Jordi; Gandía, L. M. (2020-02)
      Article
      Open Access
      Non-edible vegetable oils are characterized by high contents of free fatty acids (FFAs) that prevent from using the conventional basic catalysts for the production of biodiesel. In this work, solid acid catalysts are used ...
    • Catalytic performance of zinc-supported copper and nickel catalysts in the glycerol hydrogenolysis 

      Chimentäo, Ricardo José; Miranda Morales, Bárbara C.; Gispert Guirado, Francesc; Medina Cabello, Francisco; Llorca Piqué, Jordi; Santos, João Batista O. (2020-03-01)
      Article
      Restricted access - publisher's policy
      Gas-phase catalytic conversion of glycerol to value added chemicals was investigated over zinc-supported copper and nickel catalysts. The addition of aluminum in the support was also investigated in glycerol conversion and ...
    • 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 ...
    • Ceria catalysts at nanoscale: how do crystal shapes shape catalysis? 

      Trovarelli, Alessandro; Llorca Piqué, Jordi (2017-07-01)
      Article
      Open Access
      Engineering the shape and size of catalyst particles and the interface between different components of heterogeneous catalysts at the nanometer level can radically alter their performances. This is particularly true with ...
    • Ceria-based catalysts studied by near ambient pressure x-ray photoelectron spectroscopy: A review 

      García de Andrés, Xènia; Soler Turu, Lluís; Jiménez Divins, Nuria; Vendrell Villafruela, Xavier; Serrano Carreño, M. Isabel; Lucentini, Ilaria; Prat Albert, Jordi; Solano Minuesa, Eduardo; Tallarida, Massimo; Escudero, Carlos; Llorca Piqué, Jordi (2020-03-03)
      Article
      Open Access
      The development of better catalysts is a passionate topic at the forefront of modern science, where operando techniques are necessary to identify the nature of the active sites. The surface of a solid catalyst is dynamic ...
    • Ceria-zirconia particles wrapped in a 2D carbon envelope: improved low-temperature oxygen transfer and oxidation activity 

      Aneggi, Eleonora; Rico Perez, Veronica; de Leitenburg, Carla; Maschio, Stefano; Soler Turu, Lluís; Llorca Piqué, Jordi; Trovarelli, Alessandro (2015-10-08)
      Article
      Open Access
      Engineering the interface between different compo-nents of heterogeneous catalysts at nanometer level canradically alter their performances.This is particularly true forceria-based catalysts where the interactions are ...