MECS® High-Performance Sulfuric Acid Catalyst Products

MECS® Sulfuric Acid Catalyst Products

Our high-performance catalysts convert SO2 to SO3 for use in sulfuric acid production. Balancing activity and hardness, MECS® catalysts boost plant capacity and savings, while reducing SO2 emissions and optimizing pressure drop and service life.

MECS® has been a world leader in sulfuric acid process technologies and catalyst production for nearly 100 years. Our vast technical expertise and sulfuric acid production knowledge, coupled with our commitment to innovation, have resulted in a line of high-performance MECS® Sulfuric Acid Catalyst products, which increase the value of sulfuric acid production for our clients.

MECS® catalyst research and development is dedicated to balancing and optimizing four key performance attributes — activity, pressure drop, hardness, and service life — to yield the best sulfuric acid catalyst for every application. We produce a full range of high-quality catalysts, which deliver outstanding performance worldwide. Our knowledgeable experts can assist your organization in specifying the proper catalyst type for your converter design. 

High-Performance GEAR Series

Our latest catalysts feature a hexa-lobed ring shape and higher activity, to reduce pressure drop and improve performance.

The GEAR™ Series’ distinctive design helps increase energy savings, extend operating time, boost acid production, and reduce overall plant SO2 emissions.

This innovative sulfuric acid catalyst is characterized by its:

  • Geometrically optimized shape
  • Enhanced surface area
  • Activity improvement
  • Reduced pressure drop

Designated as GR-330 and GR-310, GEAR™ catalysts allow interchangeable use in all passes of the converter. GR-330 is produced in a 13mm diameter size, while GR-310 is 12mm in diameter.

High-Performance GEAR™ Series Catalyst


XLP Series Extended Surface Area
Our XLP Series enables low pressure drop and high conversion performance in all beds of the converter. XLP catalyst is the industry standard in sulfuric acid plants today.

XLP Series Catalyst


LP Series Rings
This series offers moderate pressure drop and high activity.

LP Series Catalyst


T Series Pellet Type
Our pellet design is ideal for low gas velocity converters, and applications where maximum durability is required for lower screening losses.

T Series Catalyst


Cesium Promoted
This catalyst series enables low plant stack emissions and lower ignition temperatures, for faster plant start-ups. 

Cesium Promoted Catalyst



  • PotashCorp—Aurora Facility Case Study

    Read the DuPont Sustainable Solutions (DSS) case study on the Aurora Facility to learn about the successful use of a combination of two distinct MECS® high-performance catalysts in a grass roots, large scale, new sulfur-burning acid plant in North America.


  • MECS® Sulfuric Acid and Environmental Technologies

  • DuPont Operator Training Simulators (OTS)

    We combine our technical expertise and owner/operator experience with our world-class safety culture to deliver a high-impact training program for your operators and engineers. By leveraging the power of DuPont’s high-fidelity dynamic process simulators students learn valuable troubleshooting and response skills in a realistic environment that models “cause and effect” relationships across the entire.


  • DuPont Sustainable Solutions (DSS)

    Discover how our sustainable business consultants customize solutions based on DuPont best practices to help clients improve their triple bottom line.


  • ZeCor® Alloy Packing Brochure

    Read the product and offering brochure to learn more about the features and benefits of using our ZeCor® Alloy packing support system.

  • DynaWave® Reverse Jet Scrubber

    Read the short brochure to learn more about the application, features and benefits of using our DynaWave® Reverse Jet Scrubbers.

  • DynaWave® Application: Cement Kilns

    To get more information on improving removal efficiency and protection against corrosion in cement kilns, please read the full bulletin on DynaWave® wet gas scrubber applications.

  • Acid Coolers Technical Brochure

    Download the MECS® engineered alloy products technical bulletin to get more information on the benefits and uses of our innovative FilmGARD®-5 Anodic Protection System offering.

  • ZeCor® Alloy Tech Bulletin

    Read the DuPont Sustainable Solutions (DSS) ZeCor® technical bulletin to learn more about our ZeCor® Alloy corrosion-resistant and high-performance metal.

  • MECS® UniFlo® Technical Bulletin

    Read the MECS® UniFlo® acid distributor technical bulletin to learn more about the uses and benefits of our ZeCor®-Z and ZeCor®-310M corrosion-resistant family of alloys in this application.

  • Zecor® Piping System Information

    MECS® ZeCor®-Z piping systems set the leading standard on prevention of leaks. The ultra-low corrosion rate of ZeCor-Z results in reduced maintenance costs. Read the brochure to learn more.

  • ZeCor® Alloy Brochure

    Download the ZeCor® Alloy technical bulletin to get more information on the benefits and uses of our corrosion-resistant and high-performance metals.

  • Ideas for a Better Cleanup

    Read the full article in Sulphur Magazine for more information on how DynaWave® wet gas scrubbers can help lower operating costs, allow greater flexibility, and lower CO2 emissions.

  • MECS® WavePak™ Brochure

    Read the brochure to learn more about how our MECS® WavePak™ ceramic porcelain packing can help your business increase both performance and savings.