Effects of support identity and metal dispersion in supported ruthenium hydrodeoxygenation catalysts

Hydrodeoxygenation of lignin-derived phenolic compounds over bi-functional Ru/H-Beta under mild conditions

“…At temperature of 413 K and with bi-functional 0.5%Ru/H-Beta catalyst, the performance in hydrodeoxygenation of diphenyl ether is better or comparable with literature reports at much higher temperature, e.g. 473 K, and with other catalyst systems [3,[13][14][15][16][17][18][19][20][21][22][23][24][25][26][27], demonstrating the great advantage of our catalyst system. Moreover, no Ru could be detected in the water phase after reaction, indicating no Ru leaching during reaction or the leached Ru below the detection limit.…”

“…Noble metals with high aromatic hydrogenation activity are alternative choices of hydrodeoxygenation catalysts. Palladium [3,[13][14][15][16], platinum [17][18][19], rhodium [20] and ruthenium [21][22] on different supports, e.g. active carbon, metal oxides and zeolites, have been evaluated in the hydrodeoxygenation process.…”

Understanding the Performance and Stability of Supported Ni-Co-Based Catalysts in Phenol HDO

“…The observed changes of metal particle size and shape in the spent catalysts might influence the adsorption modes of reactants on various sites (e.g., steps and corners). In line with this, it was suggested that the metal particle sizes could be related to different pathways in phenol HDO over Ru/TiO 2 catalyst, leading to different product distribution [40]. Various active sites in Ni/SiO 2 catalyst showed different rates in hydrogenation and dehydration during phenol HDO [53,63] and this was explained by metal particle size, as dehydration was hindered on small particles due to competitive adsorption of alcohols.…”

Kinetic Analysis of Decomposition of Ammonia over Nickel and Ruthenium Catalysts

“…The amounts of metal in the Ni and Ru catalysts were 30 wt% and 5 wt%, respectively. On the basis of the reported amounts of Ni in Ni/Al 2 O 3 catalyst (17 wt%; Zhang et al, 2005b) and Ru in Ru/Al 2 O 3 catalyst (3.6 wt%; Newman et al, 2014), the number of surface metal sites per gram of Ni catalyst was calculated to be about 80 times as large as that of Ru catalyst. These results suggest that the difference in pre-exponential factors for surface reactions between the Ni and Ru catalysts is due to the number of surface metal sites.…”