REFORMADO EN FASE LIQUIDA DE ETILENGLICOL PROPILENGLICOL Y GLICEROL PARA LA OBTENCION DE HIDROGENO

MARIA LAURA BARBELLI; FRANCISCO POMPEO; GERARDO F. SANTORI; NORA N. NICHIO

SALTA

Congreso; XVII Congreso Argentino de Catalisis. 6 Congreso Mercosur de Catalisis; 2011

The generation of hydrogen for fuel cells is interesting when using renewable sources and processes with low energy consumption. In this sense it has been made significant progress in reforming of alcohol from biomass. Liquid phase reforming (APR) represents an interesting alternative due to lower temperatures (<250 C, 20 atm) that favor the WGS reaction leading to lower CO content. In this work we studied Pt catalysts using different supports, SiO2, g-Al2O3 and MgO in the APR of ethylene glycol, propylene glycol and glycerol. Most global activity and conversion to gaseous products was obtained with Pt/g-Al2O3 in the range of 200 to 250 C. The gas stream is composed primarily of H2 and CO2, with a CO content lower than 0,3 %. The results of APR of ethylene glycol, propylene glycol and glycerol did not show a marked effect of the support against dehydration reactions. The activity and selectivity to H2 would be related to the particle size and metal dispersion of catalysts. In the APR of glycerol, the liquid phase contains about 50% propylene glycol (PG), which is interesting considering that PG has a higher commercial value than glycerol. Liquid phase reforming (APR) represents an interesting alternative due to lower temperatures (<250 C, 20 atm) that favor the WGS reaction leading to lower CO content. In this work we studied Pt catalysts using different supports, SiO2, g-Al2O3 and MgO in the APR of ethylene glycol, propylene glycol and glycerol. Most global activity and conversion to gaseous products was obtained with Pt/g-Al2O3 in the range of 200 to 250 C. The gas stream is composed primarily of H2 and CO2, with a CO content lower than 0,3 %. The results of APR of ethylene glycol, propylene glycol and glycerol did not show a marked effect of the support against dehydration reactions. The activity and selectivity to H2 would be related to the particle size and metal dispersion of catalysts. In the APR of glycerol, the liquid phase contains about 50% propylene glycol (PG), which is interesting considering that PG has a higher commercial value than glycerol. Liquid phase reforming (APR) represents an interesting alternative due to lower temperatures (<250 C, 20 atm) that favor the WGS reaction leading to lower CO content. In this work we studied Pt catalysts using different supports, SiO2, g-Al2O3 and MgO in the APR of ethylene glycol, propylene glycol and glycerol. Most global activity and conversion to gaseous products was obtained with Pt/g-Al2O3 in the range of 200 to 250 C. The gas stream is composed primarily of H2 and CO2, with a CO content lower than 0,3 %. The results of APR of ethylene glycol, propylene glycol and glycerol did not show a marked effect of the support against dehydration reactions. The activity and selectivity to H2 would be related to the particle size and metal dispersion of catalysts. In the APR of glycerol, the liquid phase contains about 50% propylene glycol (PG), which is interesting considering that PG has a higher commercial value than glycerol.