3 documents found, page 1 of 1
Direct decomposition of methane over Ni catalyst supported in magnesium aluminate.
Nuernberg, Giselle De Boit; Foletto, Edson Luiz; Campos, Carlos Eduardo Maduro de; Fajardo, Humberto Vieira; Carreño, Neftalí Lenin VillarrealIn this paper, the results obtained in the methane decomposition reaction promoted by a Ni catalyst supported on MgAl2O4 spinel are presented. The textural properties of the catalyst were investigated by X-ray diffraction (XRD), N2 adsorption/desorption isotherms (BET and BJH methods), thermogravimetric (TGA) and temperature-programmed reduction (TPR) analysis. The influence of the operating conditions employed...
Methane conversion to hydrogen and nanotubes on Pt/Ni catalysts supported over ...
Nuernberg, Giselle De Boit; Fajardo, Humberto Vieira; Foletto, Edson Luiz; Probst, Sonia Maria Hickel; Carreño, Neftalí Lenin VillarrealMethane decomposition is an endothermic process. Therefore a high temperature increases the methane conversion and improves the carbon accumulation. Nevertheless at high temperature conditions a faster deactivation of catalyst is generally observed. To keep the stability of the catalyst, lower reaction temperatures can be used as well as methane dilution but the catalytic activity is lowered. The aim of the pre...
Preparation and evaluation of Co/Al2O3 catalysts in the production of hydrogen ...
Nuernberg, Giselle De Boit; Fajardo, Humberto Vieira; Mezalira, Daniela Zambelli; Casarin, Tamara Joana; Probst, Luiz Fernando DiasThis paper presents the synthesis of Co-doped Al2O3 catalysts, developed by our group, with porous structures and high surface areas. The catalytic activity of the materials obtained was evaluated in the catalytic decomposition of methane, which is an attractive method for CO/CO2-free production of hydrogen, particularly for fuel cell applications. The catalysts were shown to be active and stable in relation to...