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​​Petrochemical and
Natural Gas ​​Adsorbents​​

 

Petrochemical Applications

The petrochemical industry uses molecular sieves to purify feedstocks and to dry and remove impurities from products such as ethylene and propylene. This protects catalysts in downstream conversion units and prevents freezing in cryogenic systems.​

Grace SYLOBEAD® molecular sieves dry cracked gas without co-adsorption of olefins. The following are some of the most common molecular sieve applications in the petrochemical industry:

  • Drying in cracked gas in order to prevent freezing
  • Drying hydrogen gas for acetylene converters
  • Drying and purification of olefins (removal of CO2 and oxygenates)
  • Dehydration and purification of a wide variety of solvents

Refining Applications

  • Drying hydrocarbon gas drying to cryogenic extraction of LPG to prevent ice and hydrate formation
  • Alkylation and isomerization feed drying: removal of water for catalyst protection and corrosion prevention
  • Drying and purification of feed streams for MTBE and butamer production
  • LPG sweetening and butane destenching
  • Non-regenerative chloride traps to prevent corrosion and contamination from attacking catalysts downstream
  • Dehydration of hydrogen in reformer regeneration train of FCC off-gases
  • Purification in the hydrogen PSA unit including dehydration, hydrocarbon recovery, and removal of CO2, CO, and other compounds
  • Separation of normal and iso-paraffins: for detergent and fuel production

Natural Gas Applications
The natural gas industry has strict specifications and limits on impurities in hydrocarbon gas and condensates supplied to processing plants and downstream customers in order to prevent corrosion, hydrate formation and freezing in cryogenic equipment. When sulfur compounds and carbon dioxide levels are too high, they need to be removed to meet product specifications or avoid formation of solid CO2.

SYLOBEAD® adsorbents are used extensively to fulfill the above requirements. Examples are:

  • Drying natural gas prior to cryogenic processing or turbo expansion with SYLOBEAD® molecular sieves
  • Sweetening natural gas for removal of H2S and mercaptans to meet pipeline specifications with molecular sieves
  • Hydrocarbon dew point control and recovery. Grace supplies hydrocarbon grade silica gel for NGL extraction where hydrocarbon dew point specifications need to be met
  • Drying sour natural gas with a modified synthetic SYLOBEAD® molecular sieve to meet transmission specifications to the sulfur removal unit

Special molecular sieves are available to remove water and sulfur components while avoiding the formation of CO2.

To select the right SYLOBEAD® molecular sieve for your specific application, please contact your Grace representative.

Grace's SYLOBEAD® zeolite molecular sieves offer the combined benefits of high selective adsorption properties with high mechanical integrity due to advanced manufacturing and de-dusting technologies.​​

To select the right SYLOBEAD® zeolite for your application, please contact your Grace representative, or download the SYLOBEAD® Natural Gas Technical Information Sheet.