Now showing items 1-9 of 9

    • 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
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      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 ...
    • Conversion of glycerol over 10%Ni/y-Al2O3 catalyst 

      Miranda Morales, Bárbara C.; Chimentao, Ricardo J; Santos, Jeannette B O; Gispert Guirado, Francesc; Llorca Piqué, Jordi; Medina Cabello, Francisco; López Bonillo, Francisco; Sueiras, Jesus Eduardo (2014-04-05)
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      The conversion of glycerol in gas phase and atmospheric pressure has been investigated over 10 wt.% Ni/γ-Al2O3 catalyst. The catalysts were prepared with nickel nitrate and pre-treated with hydrogen in the range of 623–1073 ...
    • Direct growth of hydrotalcite nanolayers on carbon fibers by electrospinning 

      Modesto Lopez, Luis B; Chimentao, Ricardo J; Alvarez, Mayra G; Rosell Llompart, Joan; Medina Cabello, Francisco; Llorca Piqué, Jordi (2014-11-01)
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      Hydrotalcite (HT) nanolayers have been grown directly on carbon fibers by carbonization and subsequent hydration of electrospun PVA/PEO/MgAl-nitrate fibers. The growth of the layered material was ascertained by X-ray ...
    • Durable ethanol steam reforming in a catalytic membrane reactor at moderate temperature over cobalt hydrotalcite 

      Espinal, Raul; Anzola, Andrés; Adrover, E; Roig Costa, Maria; Chimentao, Ricardo J; Medina Cabello, Francisco; López, E; Borio, Daniel O.; Llorca Piqué, Jordi (2014-07-15)
      Article
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      Ethanol steam reforming has been carried out in a catalytic membrane reactor consisting of cobalt hydrotalcite [Co2Mg4Al2(OH)(16)]CO3 center dot 4H(2)O-derived catalyst doped with potassium supported over cordierite and a ...
    • Ethanol steam reforming over hydrotalcite-derived Co catalysts doped with Pt and Rh 

      Espinal, Raul; Taboada Cabellos, Elena; Molins, Elies; Chimentao, Ricardo J; Medina, Francisco; Llorca Piqué, Jordi (2013-12)
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      Honeycomb structures loaded with hydrotalcite-derived cobalt catalysts doped with various amounts of Pt and Rh have been tested in the steam reforming of ethanol at 523-823 K under different operational conditions. Catalysts ...
    • Influence of copper on nickel-based catalysts in the conversion of glycerol 

      Miranda Morales, Bárbara C.; Chimentao, Ricardo J; Szanyi, J; Braga, A.H.; Santos, Jeannette B O; Gispert Guirado, Francesc; Llorca Piqué, Jordi; Medina Cabello, Francisco (2015-05-01)
      Article
      Open Access
      The catalytic transformation of glycerol to value-added compounds was investigated over bimetallic Ni-Cu/gamma-Al2O3 catalysts with Ni/Cu atomic ratios of 8/1, 4/1, 2/1, 1/1, 1/2, 1/4, and 1/8. XPS analysis revealed that ...
    • Sources of deactivation during glycerol conversion on Ni/gamma-Al2O3 

      Chimentao, Ricardo J; Miranda Morales, Bárbara C.; Szanyi, J; Sepulveda, C.; Santos, Jeannette B O; Correa, J. V. S.; Llorca Piqué, Jordi; Medina Mena, Francisco (2017-07-01)
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      Hydrogenolysis of glycerol was studied using a diluted aqueous solution of glycerol in gas phase and atmospheric pressure on Ni/¿-Al2O3 catalyst. The catalytic transformation of glycerol generates products derived from ...
    • Synthesis of tungsten carbide on Al-SBA-15 mesoporous materials by carburization 

      Alvarez, Mayra G; Chimentao, Ricardo J; Tichit, D.; Santos, Jeannette B O; Dafinov, Antonio; Modesto Lopez, Luis B; Rosell Llompart, Joan; Gueell, E. J.; Gispert Guirado, Francesc; Llorca Piqué, Jordi; Medina Mena, Francisco (2016-01-01)
      Article
      Open Access
      Aluminum was incorporated into SBA-15 supports at molar ratios Si/Al = 10 and 2 by the pH-adjusting method. The calcined mesoporous Al-SBA-15 supports, as well as the Al-free SBA-15 support, were impregnated with ammonium ...
    • Total degradation of p-hydroxybenzoic acid by Ru-catalysed wet air oxidation: a model for wastewater treatment 

      Hammedi, Tijani; Triki, Mohamed; Alvarez, Mayra G; Chimentao, Ricardo J; Ksibi, Zouhaier; Ghorbel, Abdelhamid; Llorca Piqué, Jordi; Medina Mena, Francisco (2015-12-01)
      Article
      Open Access
      Catalytic wet air oxidation using heterogeneous catalysts is a promising technology for treatment of wastewaters. Wastewaters from olive oil mills are difficult to clean because effluents contain high levels of phenolic ...