Galexia suite of hydroprocessing ctalysts and services

Galexia™ platform of hydroprocessing catalysts and services

The transformative Galexia platform of specialty hydroprocessing solutions from ExxonMobil and Albemarle combines state-of-the-art catalysts and unsurpassed service expertise to optimize your operation and identify high-value opportunities for step-out growth and profitability.

  • Leverages companies’ extensive hydroprocessing knowledge to tap into full potential of high-performing Nebula®, Celestia™ and MIDW™ specialty catalysts
  • Industry-leading activity enables new opportunities and operational flexibility.
  • Delivers tailored, drop-in solutions for catalyst refills to help refiners optimize performance and efficiency
  • Ensures customer demands are better addressed throughout the value chain
  • Builds on long-term, expert relationship that led to the development and commercialization of several key industry catalysts used around the world


Galexia includes breakthrough Celestia™ HDT catalyst, as well as Nebula™ and MIDW™ catalysts. Application of these technologies in distillate hydrotreaters, as well as in light cycle oil (LCO) and vacuum gas oil (VGO) hydrocracker pretreaters, have yielded exceptional returns.

Galexia services

The combined, complementary expertise of ExxonMobil and Albemarle is unsurpassed in the industry, as is our shared commitment to implementing best practices and to achieving results that help refiners succeed. Services include:
  • Refinery optimization

    Galexia goes beyond traditional product offerings to help refiners optimize performance/efficiency by analyzing plant operations and identifying value across the refinery. With Galexia, refiners will be able to:
    • Meet refinery targets by maximizing the value of state-of-the-art catalysts
    • Deliver superior performance in existing units by optimizing reactor configurations and catalyst loads derived from extensive experience in profitable refinery operations

  • Pointing to schematics.

    Collaborative, expert Galexia services

    Uniquely leveraging the technical experience, refinery operating know-how and successful track record of both companies, with the Galexia platform, refiners will receive value-added services in addition to a comprehensive integrated suite of products

Success story

Celestia catalyst was loaded into a high-pressure hydrocracker processing vacuum gasoil, light cycle oil and heavy coker gasoil.


  • Increase cycle length to align turnarounds
  • Increase HDC yields at equal cold-flow properties

Optimized loadings

  • ~40% Celestia and Nebula in pretreat reactor with NiMo hydrotreating catalysts
  • ~15% MIDW in the hydrocracking downstream reactor
galexia results chart

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