Documents disponibles écrits par cet auteur

Comparison between effective electrode/electrolyte interface potential and applied potential for gold electrodes / Patricia Taboada-Serrano in Industrial & engineering chemistry research, Vol. 47 N°10 (Mai 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 N°10 (Mai 2008) . - p. 3525–3531 Titre : Comparison between effective electrode/electrolyte interface potential and applied potential for gold electrodes Type de document : texte imprimé Auteurs : Patricia Taboada-Serrano, Auteur ; Viriya Vithayaveroj, Auteur ; Chia-Hung Hou, Auteur ; Sotira Yiacoumi, Auteur Année de publication : 2008 Article en page(s) : p. 3525–3531 Note générale : Bibliogr. p. 3530-3531 Langues : Anglais (eng) Mots-clés : Gold  electrode;  AFM  measurements Résumé : A nonlinear solution of the Poisson−Boltzmann equation between two interacting surfaces was used to model the interaction force between a gold electrode and a standard silicon−nitride cantilever tip employed in atomic force microscopy (AFM). AFM measurements were used to calculate the effective gold electrode/electrolyte solution interface potential via minimization of the error between predicted interaction force values and those measured via AFM. Analysis of the data reveals that an effective electrode/electrolyte potential, rather than the applied potential to the electrode, is responsible for the interaction forces observed in this work. Further examination of the gold electrode/electrolyte interface via cyclic voltammetry reveals that, despite the fact that the gold electrode is considered inert, some degree of association of ions present in the solution with the gold electrode occurs. Accumulation of different ions in the solution at the electrode/electrolyte interface determines the magnitude of the effective potentials at different conditions of pH and ionic strength. At extreme conditions of pH, electrosorption of ionic species could be detected. En ligne : http://pubs.acs.org/doi/10.1021/ie070900p [article] Comparison between effective electrode/electrolyte interface potential and applied potential for gold electrodes [texte imprimé] / Patricia Taboada-Serrano, Auteur ; Viriya Vithayaveroj, Auteur ; Chia-Hung Hou, Auteur ; Sotira Yiacoumi, Auteur . - 2008 . - p. 3525–3531. Bibliogr. p. 3530-3531 Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 N°10 (Mai 2008) . - p. 3525–3531 Mots-clés : Gold  electrode;  AFM  measurements Résumé : A nonlinear solution of the Poisson−Boltzmann equation between two interacting surfaces was used to model the interaction force between a gold electrode and a standard silicon−nitride cantilever tip employed in atomic force microscopy (AFM). AFM measurements were used to calculate the effective gold electrode/electrolyte solution interface potential via minimization of the error between predicted interaction force values and those measured via AFM. Analysis of the data reveals that an effective electrode/electrolyte potential, rather than the applied potential to the electrode, is responsible for the interaction forces observed in this work. Further examination of the gold electrode/electrolyte interface via cyclic voltammetry reveals that, despite the fact that the gold electrode is considered inert, some degree of association of ions present in the solution with the gold electrode occurs. Accumulation of different ions in the solution at the electrode/electrolyte interface determines the magnitude of the effective potentials at different conditions of pH and ionic strength. At extreme conditions of pH, electrosorption of ionic species could be detected. En ligne : http://pubs.acs.org/doi/10.1021/ie070900p

Multiphase, microdispersion reactor for the continuous production of methane gas hydrate / Patricia Taboada-Serrano in Industrial & engineering chemistry research, Vol. 48 N° 13 (Juillet 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 13 (Juillet 2009) . - pp. 6448–6452 Titre : Multiphase, microdispersion reactor for the continuous production of methane gas hydrate Type de document : texte imprimé Auteurs : Patricia Taboada-Serrano, Auteur ; Shannon Ulrich, Auteur ; Phillip Szymcek, Auteur Année de publication : 2009 Article en page(s) : pp. 6448–6452 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Hydrate  reactor  CO2  hydrate  stream  CH4  hydrate  Seafloor  process  simulator Résumé : A continuous-jet hydrate reactor originally developed to generate a CO2 hydrate stream has been modified to continuously produce CH4 hydrate. The reactor has been tested in the Seafloor Process Simulator (SPS), a 72-L pressure vessel available at Oak Ridge National Laboratory. During experiments, the reactor was submerged in water inside the SPS and received water from the surrounding through a submersible pump and CH4 externally through a gas booster pump. Thermodynamic conditions in the hydrate stability regime were employed in the experiments. The reactor produced a continuous stream of CH4 hydrate, and based on pressure values and amount of gas injected, the conversion of gas to hydrate was estimated. A conversion of up to 70% was achieved using this reactor. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8019517 [article] Multiphase, microdispersion reactor for the continuous production of methane gas hydrate [texte imprimé] / Patricia Taboada-Serrano, Auteur ; Shannon Ulrich, Auteur ; Phillip Szymcek, Auteur . - 2009 . - pp. 6448–6452. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 13 (Juillet 2009) . - pp. 6448–6452 Mots-clés : Hydrate  reactor  CO2  hydrate  stream  CH4  hydrate  Seafloor  process  simulator Résumé : A continuous-jet hydrate reactor originally developed to generate a CO2 hydrate stream has been modified to continuously produce CH4 hydrate. The reactor has been tested in the Seafloor Process Simulator (SPS), a 72-L pressure vessel available at Oak Ridge National Laboratory. During experiments, the reactor was submerged in water inside the SPS and received water from the surrounding through a submersible pump and CH4 externally through a gas booster pump. Thermodynamic conditions in the hydrate stability regime were employed in the experiments. The reactor produced a continuous stream of CH4 hydrate, and based on pressure values and amount of gas injected, the conversion of gas to hydrate was estimated. A conversion of up to 70% was achieved using this reactor. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8019517