Nickel and vanadium are often found in heavier hydrocarbon fractions such as vacuum gas oil (VGO), to a lesser extent in heavy coker gas oil, but particularly in deasphalted oil (DAO). When nickel and vanadium deposit on the catalyst, they deactivate the catalyst by plugging up the pore system. In general, the higher a feedstock’s distillation end-point, the higher the concentration of nickel and vanadium. This explains why the problem occurs frequently in fluid catalytic cracking (FCC) pretreaters running on heavy feedstocks.
Topsoe offers a very comprehensive portfolio of guard catalysts that effectively trap nickel and vanadium before they reach your high-activity main catalyst. Our guards deliver very high hydrodemetallization (HDM) activity and capacity, ensuring that they not only capture contaminants, but can store them throughout the cycle length.
Catalysts
Catalysts
The performance catalysts we supply for this application are listed below.
CatalystsTK-453 SiliconTrap™
TK-453 SiliconTrap™ is a NiMo catalyst with very high rates for removal of metals (Ni, V, Fe) and silicon, and it is an excellent guard in hydrotreaters that process heavy feeds. It exhibits moderate hydrodesulfurization (HDS) and hydrodenitrogenation (HDN) activities. The pore size distribution...
CatalystsTK-455 MultiTrap™
Hydroprocessing catalyst TK-455 MultiTrap™ is a large pore, high-porosity catalyst for trapping silicon and phosphorus in gasoil and vacuum gas oil (VGO) feeds. TK-455 MultiTrap™ is applied in the top bed of hydrotreaters as part of the catalyst grading system. The unique pore system...
CatalystsTK-709
TK-709 is a high-surface area, low-activity catalyst with high hydrodemetallization (HDM) activity and metal storage capacity. It is typically used in various grading applications for all types of feeds, particularly where iron is encountered. It is especially suitable for olefin containing feeds,...
CatalystsTK-710 HyOctane™
TK-710 HyOctane™ is a CoMo type catalyst with moderate hydrodesulfurization (HDS) activity, limited loss of octane, high hydrodemetallization (HDM) activity and metal storage capacity. It is applied in fluid catalytic cracking (FCC) gasoline post-treatment and various grading applications...
CatalystsTK-711
TK-711 is a catalyst with high hydrodemetallization (HDM) activity, metal storage capacity and moderate hydrodesulfurization (HDS) activity. It is used in various grading applications for all types of feeds.
CatalystsTK-719
TK-719 is a high-porosity demetallization catalyst for fixed-bed resid service. It is applied in the front-end of resid hydrotreaters due to its enhanced ability to remove metals and asphaltenes and to reduce Conradson carbon residue (CCR). Even though large particles usually result in lower...
CatalystsTK-733
TK-733 is a demetallization (HDM) catalyst with moderate hydrodesulfurization (HDS) activity for fixed-bed resid service. TK-733 is typically used for the reduction of metals, asphaltenes and Conradson Carbon as a first-stage catalyst in composite catalyst fillings. The optimized pore system and...
CatalystsTK-743
TK-743 is a demetallization catalyst with moderate hydrodesulfurization (HDS) activity for fixed-bed resid service and vacuum gas oil (VGO) hydrotreating. It is typically used for reduction of metals, asphaltenes and Conradson Carbon Residue (CCR) as a first-stage catalyst in composite catalyst...
CatalystsTK-753
TK-753 is a transition catalyst in fixed-bed resid hydrodesulfurization (HDS) systems. In such applications, it would be preceded by a hydrodemetallization (HDM) type catalyst and followed by a HDS-type catalyst (like TK-773). TK-753 exhibits good HDS activity and HDM selectivity. The pore size...
CatalystsTK-773
TK-773 is a final-stage catalyst for fixed-bed resid hydrodesulfurization (HDS) units. It has a high HDS, hydrodenitrogenation (HDN) and Conradson Carbon Residue (CCR) removal activity and, as such, has a low hydrodemetallization (HDM) selectivity. The pore size distribution and pore volume have...- Catalysts
TK-831
TK-831 provides high hydrodemetallization (HDM) activity, metal storage capacity and moderate hydrodesulfurization (HDS) and hydrodenitrogenation (HDN) activity. It is used in various grading applications for all types of feeds.
Services
Services
The services we supply for this application are listed below.
ServicesCatalyst Loading
All plants – even those with lots of turnaround experience – can run into trouble during loading. When a problem occurs, it can lead to longer turnarounds and, in the worst case, result in an underperforming catalyst. That makes proper loading an important step in profitable plant operation. Topsoe...
ServicesGeneral Technical Service
Optimal interaction between catalyst and technology is crucial if your plant is to perform at its best. Topsoe’s General Technical Service employs the full weight of our knowledge and experience to advise, inform and guide you towards improvement. All General Technical Service is provided as in-...
ServicesPlant Assessment / Optimization
Refineries and chemical plants are complex and vulnerable to changes over time. These changes can degrade performance and impact negatively on day-to-day operations and, ultimately, your bottom line. Whether you choose a catalyst performance evaluation or full-scale process and catalyst...
ServicesSampling & Analysis
As a general rule, the more you know about a plant or unit’s operating conditions, the better you’ll be able to keep performance, cost-efficiency and profits high. Our Sampling & Analysis service is your direct route to the detailed insight it takes to make better decisions. During start-ups...
ServicesStart-up & Reduction / Activation
Starting up your plant or unit is a complicated and time-consuming procedure that involves monitoring numerous parameters and ensuring the right start-up sequencing. If not performed correctly, it can result in delays or even damage to your catalysts, unit or plant. Our Start-up & Reduction/...
ServicesTroubleshooting
Catalysts and processes normally operate smoothly, yet suboptimal performance can occur from time to time. Since most issues have multiple root causes – usually originating in external factors – the process of solving an issue can be difficult and complex. Our Troubleshooting service draws on the...
