TY - JOUR
T1 - Hemicellulose arabinogalactan hydrolytic hydrogenation over Ru-modified H-USY zeolites
AU - Murzina, Elena
AU - Kusema, Bright
AU - Murzin, Dmitry
AU - Aho, Atte
AU - Tokarev, Anton
AU - Boymirzaev, Azamat S.
AU - Wärnå, Johan
AU - Dapsens, Pierre Y.
AU - Mondelli, Cecilia
AU - Pérez-Ramírez, Javier
AU - Salmi, Tapio
N1 - tk.
PY - 2015
Y1 - 2015
N2 - The hydrolytic hydrogenation of hemicellulose arabinogalactan was investigated in the presence of protonic and Ru (1–5 wt.%)-modified USY zeolites (Si/Al ratio = 15 and 30). The use of the purely acidic materials was effective in depolymerizing the macromolecule into free sugars. While the latter partly dehydrated into 5-hydroxymethylfurfural and furfural, the generation of high molecular-weight compounds (aggregates of sugars and humins) was not favored, in contrast to previous evidences over beta zeolites. Application of the bifunctional Ru/USY catalyst, comprising well-dispersed metallic nanoparticles on the aluminosilicate support, resulted in the formation of galactitol and arabitol, in the suppression of dehydration side products, and further inhibition of polymerization reactions, which only yielded low molecular-weight oligomers. Detailed analysis of the reaction pathways as well as kinetic modeling of hydrolytic hydrogenation was performed with an advanced reaction mechanism.
AB - The hydrolytic hydrogenation of hemicellulose arabinogalactan was investigated in the presence of protonic and Ru (1–5 wt.%)-modified USY zeolites (Si/Al ratio = 15 and 30). The use of the purely acidic materials was effective in depolymerizing the macromolecule into free sugars. While the latter partly dehydrated into 5-hydroxymethylfurfural and furfural, the generation of high molecular-weight compounds (aggregates of sugars and humins) was not favored, in contrast to previous evidences over beta zeolites. Application of the bifunctional Ru/USY catalyst, comprising well-dispersed metallic nanoparticles on the aluminosilicate support, resulted in the formation of galactitol and arabitol, in the suppression of dehydration side products, and further inhibition of polymerization reactions, which only yielded low molecular-weight oligomers. Detailed analysis of the reaction pathways as well as kinetic modeling of hydrolytic hydrogenation was performed with an advanced reaction mechanism.
U2 - 10.1016/j.jcat.2015.06.022
DO - 10.1016/j.jcat.2015.06.022
M3 - Artikel
SN - 0021-9517
VL - 330
SP - 93
EP - 105
JO - Journal of Catalysis
JF - Journal of Catalysis
ER -