Mechanism of the Hydrodenitrogenation of Quinoline over NiMo(P)/Al2O3Catalysts

Nature of active sites in Ni2P hydrotreating catalysts as probed by iron substitution

“…On phosphides similar studies have not been carried out, but it is likely that again no single rate-limiting step is involved, and that CNH will be one of the key steps. The CNH reaction is a complex reaction and requires multiple sites [79][80][81] among them an acid site to bind the nitrogen compound and a proximal basic site to carry out a β-H attack. Thus, the reaction is structure sensitive [67], and is expected to be influenced by the substitution of Fe for Ni at the surface.…”

Hydrodenitrogenation of Quinoline Over a Dispersed Molybdenium Catalyst Using in situ Hydrogen

“…It was reported that the adsorption constants of quinolinetype compounds were 5-20 times larger than those of alkylanilines including OPA [17]. Therefore, OPA is less likely to adsorb and react on a catalyst surface when competing with quinoline-type compounds, as was also observed by Jian and Prins [18].…”

Hydrodenitrogenation of quinoline and its intermediates over sulfided NiW/γ‐Al2O3 in the absence and presence of H2S

“…In the presence of DHQ, quinoline, and THQ, the rate of HDN of OPA is considerably suppressed [19,20] . However, the THQ1-OPA reaction path cannot be negligible and amounts to about 40% of quinoline HDN [13] . In the HDN of quinoline, the denitrogenation activity increased drastically with increasing reaction temperature, while hydrogenation activity increased slightly, indicating that the denitrogenation reaction has a higher activation energy than hydrogenation reaction.…”

“…The increases of C9 and OPA were more than that of DHQ. Meantime, further conversion of OPA was inhibited by quinoline-type compounds because of their stronger adsorption than that of OPA [13] . The influences of temperature and pressure also on the HDN of quinoline were investigated at a temperature between 300 and 420…”