Catalyst Re-Impregnation

DOES YOUR CATALYST NEED A NEW LIFE ?

Seqens’ diverse assets include plants with the capability improve the strength and re-impregnate silica hydrogels and cogels, zeolites and other catalysts supports.

Seqens can:

• Wash the silica and other catalyst supports with aqueous or organic solutions
• Add active metal precursors via incipient wetness impregnation
• Dry with hot air/ nitrogen or with a double cone drier.

Incipient wetness impregnation, is a commonly used technique for the synthesis of heterogeneous catalysts. Typically, the active metal precursor is dissolved in an aqueous or organic solution. Then the metal-containing solution is added to a catalyst support containing the same pore volume as the volume of the solution that was added. Capillary action draws the solution into the pores. Solution added in excess of the support pore volume causes the solution transport to change from a capillary action process to a diffusion process, which is much slower. The catalyst can then be dried and calcined to drive off the volatile components within the solution, depositing the metal on the catalyst surface. The maximum loading is limited by the solubility of the precursor in the solution. The concentration profile of the impregnated compound depends on the mass transfer conditions within the pores during impregnation and drying.

Our Expertise

Seqens Custom Specialties has many years of experience of catalyst regeneration and our experts can help determine if our process equipment is appropriate for your project. To learn more contact us and ask about our development capabilities which allow us to test your requirements on a small scale prior to production.