Oxidative dehydrogenation of ethylbenzene to styrene over carbonaceous catalysts

Reactivity and deactivation mechanisms of pyrolysis chars from bio-waste during catalytic cracking of tar

“…Indeed, the coke is "stored" in the porous volume which increases the time needed to totally cover the char surface. This conclusion is in agreement with the results published by Drago et al [61]. The pore size is also involved in the deactivation kinetics by coke deposition.…”

Air oxidized activated carbon catalyst for aerobic oxidative aromatizations of N-heterocycles

“…We performed the latter experiment in anisole, which in addition to its higher boiling point, also has complementary value both in terms of safety and environmental profile. 41,42 Based on literature, [6][7][8]11 we supposed that molecular oxygen was acting as the terminal oxidant, so we investigated its role by running the reaction under inert atmosphere (Table 2, entry 8). Surprisingly, we obtained 24% yield, despite thorough removal of oxygen from the reaction mixture.…”

“…Moreover, in oxidations, when (atmospheric) oxygen is employed to regenerate carbocatalyst's active sites, water and/or hydrogen peroxide is the only by-products generated. 6,7 Alongside ACs, [3][4][5][6][7][8][9][10][11][12] other carbon allotropes such as carbon nanotubes (CNTs), [11][12][13][14][15] nanodiamonds (NDs), graphene oxides (GOs), [16][17][18] and nanohorns, have been employed as catalysts (Scheme 1) for organic transformations. 19,20 Gas-phase dehydrogenations of hydrocarbons in particular have been extensively studied with these materials, with received yields comparable to those of AC.…”

The influence of texture of activated carbons on their catalytic activity in the process of ethylbenzene dehydrogenation coupled with nitrobenzene hydrogenation

“…According to Pereira et al, the catalyst texture is an important parameter controlling their activity, but only in a certain range of pore size [22], while they have not observed a correlation between the mesopores area and the catalysts activity. Drago and Jurczyk [25] have reported that ODE most probably takes place in meso-and macropores, although they also have not noted a direct correlation between the pore area and the catalytic activity. However, they claim that the catalysts with greater pore size show a higher activity in the process.…”