Artículos de revistas
Hydrogen generation from renewables: Steam reforming of ethanol and dimethyl ether over structured catalysts
Fecha
2009-09Registro en:
Ledesma, Cristian; Domínguez, Monserrat; Jiménez, Nuria; Lopez, Eduardo; Llorca, Jordi; Hydrogen generation from renewables: Steam reforming of ethanol and dimethyl ether over structured catalysts; Teknoscienze Publisher; Chimica Oggi-chemistry Today; 27; 5; 9-2009; 40-43
1973-8250
CONICET Digital
CONICET
Autor
Ledesma, Cristian
Domínguez, Monserrat
Jiménez, Nuria
Lopez, Eduardo
Llorca, Jordi
Resumen
Ethanol and dimethyl ether can be efficiently reformed with steam over appropriate catalysts for generating hydrogen. Both substrates provide a valuable example of the use of renewable chemicals for energy applications. At temperatures as low as 623 K, a mixture of ethanol and water at S/C=1.5 can yield as much as 92 percent H2 over honeycomb structures coated with cobalt-based catalyst layers, with only 1 percent carbon monoxide. Dimethyl ether can be similarly reformed at 823 K. At S/C=1.5, hydrogen yields up to 80 percent are obtained over honeycombs coated with copper-zinc supported over ZrO2. The performance of these systems improves considerably by using microreaction technologies, not only by increasing the surface-to-volume ratio, but also for allowing autothermal regimes.