Cestoil Chemical Served the downstream industry for many years, we provide chemicals and technical support to enhance plant processes, improve productivity, manage water treatment and resolve environmental issues

• Refining
  • Overhead Corrosion Control
  • Desalting
  • CMR Technology
  • HDS Fouling Control
  • GAT Liquid Yield Increase Technology
  • GProtect Nap Acid Corrosion Control Technology
  • Industrial Cleaning Service
  • Vanadium Passivation
• Fuel Additive
  • Cetane Improver
  • Cold Flow Improver
  • Antistatic Additive
  • Antioxidant
  • Lubricity Improver
  • H₂S Scavenger
  • Mercaptan Scavenger
  • Diesel Stabiliser
  • Multifuntional Performance Additives
• Petrochemical Additive

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Vanadium Passivation

Problem

Metals passivation refers to the reduction of the ill effects of metal contaminants in FCCU feed on FCC catalyst. Nickel, Vanadium, Copper, Iron, and Sodium are common in Fluid Catalytic Cracking Unit feed stocks. These are contaminants that reduce FCC catalyst activity and can result in increased compressor loading, higher regenerator temperature requirements due to excessive coke formation, and reduced gasoline and LCO yields.

FCC Units processing feedstock’s containing high levels of heavy metals typically suffer significant catalyst poisoning problems that result in lower selectivity, lower conversion, and/or decreased capacity. Under conditions in the FCC Unit, nickel and vanadium containing organic compounds deposit on the catalyst and are converted to forms, which promote the production of hydrogen and coke. An increase in hydrogen production can load up the compressor and back out feed charge. In fact, all heavy metals exhibit these negative effects to some extent, but nickel is the worst in terms of the dehydrogenation reaction. Vanadium, when oxidized in the regenerator, will react with the zeolite and permanently destroy it, therefore greatly reducing activity. It has also been shown that sodium in combination with vanadium is even more destructive to the catalyst, perhaps through the reactions involving sodium vanadates. The relative impact of the various metals for promoting hydrogen and coke formation is approximately: Fe = 1X, V = 2X, Cu = 8X, and Ni = 10X by weight. The relative effects are not exact and are influenced by feedstock composition, operating conditions, catalyst type, and the age of the metals on the catalyst.

Benefit of Cestoil Chemicals' Vanadium Passivation Program

Cestoil Chemical's Vanadium Passivation Program provide the following benefit to our customer:

• Reduced catalyst makeup rates while maintaining catalyst Mat Activity constant.
• Marginal distillate yield increases.