Deactivation patterns of Mo/Al2O3, Ni–Mo/Al2O3 and Ni–MoP/Al2O3 catalysts in atmospheric residue hydrodesulphurization

Effect of interactions between Ni and Mo on catalytic properties of a bimetallic Ni-Mo/Al 2 O 3 propane reforming catalyst

“…Mo-Ni catalysts have been extensively studied in the literature as active and stable hydrodesulphurization catalysts [20,21]. In these catalyst formulations, the Mo loading is greater Page 5 of 53 A c c e p t e d M a n u s c r i p t than that of Ni, since Mo is the primary desulphurization metal, while Ni is added as a promoter.…”

The importance of pre-treatment of spent hydrotreating catalysts on metals recovery

“…This phenomenon is characterized by a considerable loss of surface area and especially by a dramatic decrease of the catalytic activity. 2,8,9 Disposal of spent catalyst requires compliance with stringent environmental regulations. They are basically regarded as solid waste.…”

Catalyst deactivation pattern along a residue hydrotreating bench-scale reactor

“…Fig. 3b shows the subtraction of the spectra of the Z i -spent and the fresh sample spectra taken at 300 • C. In this region the absorption is expected due to stretching of C O (1750-1650 cm −1 ), aromatic C C (1630-1500 cm −1 ) and the "coke peak" (1585 cm −1 ) [30]. As the catalyst is under an oxidation process, the three peaks detected at 1782, 1622, and 1554 cm −1 can be attributed to graphite oxide [34][35][36].…”

“…Several studies on deactivation by metals and coke in hydroprocessing catalysts have been reported [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28]. Nonetheless, only few studies on deactivation pattern along residue hydrotreating bench-scale reactor have been published [29][30][31][32]. In this paper, the catalyst deactivation of the first stage of a hydrotreating bench-scale reactor is analyzed.…”