SRGO hydrotreating over Ni-phosphide catalysts on granulated Al2O3

Effect of the nickel impregnation method on clay supports in the hydroconversion reaction of n-decane

“…As has been reported, the H 2 consumptions attributed to this type of supports can be considered negligible, 32,39,44 which allows us to assume that the signals obtained are the result of the Ni reduction present in the catalysts. 71 When comparing the influence of the Ni incorporation method, it is observed that "WI" synthesis facilitates the reduction process given that the maximum temperatures shifted towards lower values, as did the H 2 consumptions (Table 2), possibly indicating the formation of particles of smaller size, which may be related to the higher surface area values found when this method was used, as previously discussed. In the case of the auto-combustion methods, the higher H 2 consumptions found at high temperatures can be related to the hot spots that are generated during synthesis, which would facilitate the migration of NiO species and given that the NiO Tamman temperature is 261 °C, values that can be exceeded during auto-combustion, it would become easier for NiO to diffuse and agglomerate, generating larger particle sizes, which would displace the reduction signals at higher temperatures.…”

“…As has been reported, the H 2 consumptions attributed to this type of supports can be considered negligible, 32,39,44 which allows us to assume that the signals obtained are the result of the Ni reduction present in the catalysts. 71…”

Towards improvement of hydroprocessing catalysts - understanding the role of advanced mineral materials in hydroprocessing catalysts

“…Transition metal phosphides [96] , silicides, and carbides, nitrides have been proposed as deep HDS catalysts [95,97] . Carbides have drawn much attention due to their unique catalytic properties for deep HDS such as the resistance to sintering at high temperatures during HDS reactions; they have strong interactions with heteroatoms (S, N) and inertness towards C-C bond scission, resulting in high selectivity, high hydrogenation activity with their noble metallike catalytic properties [95,98,99] . Doping non-metal atoms into metal phosphides results in the formation of isolated sites and electronic modification that enhances HDS activity and stability [95] .…”

“…Doping non-metal atoms into metal phosphides results in the formation of isolated sites and electronic modification that enhances HDS activity and stability [95] . However, metal phosphides suffer from long-term stability and are prone to deactivation due to their strong affinity with the adsorbates, especially at high temperatures [99] . Several authors have shown that transition metal phosphides (MoP, Ni 2 P, and Co 2 P) as an active phase are found to be one of the active catalysts in HDS catalysts [100] .…”

Perspectives on strategies for improving ultra-deep desulfurization of liquid fuels through hydrotreatment: Catalyst improvement and feedstock pre-treatment

“…Metal borides, phosphides, carbides, and nitrides have also been investigated as metal precursors (Alexander and Hargreaves, 2010;Prins and Bussell, 2012;Carenco et al, 2013;Topalian et al, 2021). Transition metal phosphides (Ni 2 P, Co 2 P, MoP) have been found to produce highly active phases that lead to high HDS and HDN activity (Cecilia et al, 2009;Shamanaev et al, 2021). Ni 2 P gives the highest activity and performs better when it comes to hydroprocessing refractory compounds (Miles et al, 2020;Jiang et al, 2021).…”