The Fluid Catalytic Cracking Unit (FCCU, Cat Cracker or Cat Unit) is critical to the catalytic process used by most refineries to convert heavy gasoil and resid into gasoline and distillates. Metallic impurities, such as Nickel and Vanadium, adversely impact the catalyst’s capability to produce the desired products. For many years, Nalco Champion has been at the forefront of passivation research and solutions addressing these challenges.
Ecolab, 2 Daniel Place, PO Box 10061, Te Rapa, Hamilton, New Zealand 3241
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Nickel Passivation Nickel is an impurity in the feed to FCC units. It competes with the FCC catalyst to promote dehydrogenation reactions, resulting in more hydrogen and coke formation and less production of valuable products. Nickel can also constrain throughput. Our nickel passivation solutions for FCCs inhibit its activity as a competitive catalyst, allowing the unit to proceed at top efficiency. Benefits include:
More selective production
Less demand on the wet gas compressor
Less demand on the regenerator air blower
Improved cat-to-oil ratio
Vanadium Passivation Vanadium can behave as a competitive catalyst similar to nickel. Additionally, vanadium will combine with sodium to form a component that destroys the FCC catalyst’s active sites. Without passivation, vanadium can lead to reduced catalyst specificity, increased cost in catalyst replacement and, potentially, increased coke and hydrogen production. Introduce our patented technology into your system to passivate vanadium and minimise its problems. Benefits are: