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Molecular sieve HYZ05B
Synthetic zeolite with 5 Å pore size for selective removal of H₂S and mercaptans from natural gas and LPG while suppressing COS formation
Description
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▎Product overview
HYZ05B is a synthetic zeolite molecular sieve with a type A crystal structure, the ionic form is calcium-sodium, and the effective pore size is 5 angstroms (0.5 nm). The product is specially designed for the purification of natural gas (NG) and liquefied petroleum gas (LPG). It is capable of selectively removing hydrogen sulfide (H₂S) and low molecular weight mercaptans, and, due to the effect of molecular sieve separation and surface chemical properties, effectively suppressing the formation of carbonyl sulfide (COS), ensuring the safety of downstream processes and pipeline transportation.
▎Process description
HYZ05B is loaded into a fixed bed adsorption column through which the natural gas or LPG to be purified is passed at a certain pressure and volumetric velocity. The pore size of 5 Å allows H₂S and low molecular weight mercaptans to penetrate intracrystalline channels and be adsorbed while excluding larger molecules. By limiting pore size and controlling surface acidity, the likelihood of COS formation from the reaction of H₂S with CO₂ within the layer is reduced. After saturation, activity can be restored by thermal regeneration. The recommended regeneration temperature is not higher than 350 °C, which ensures long-term cyclic operation.
▎Key Benefits
• Precise 5 Å pore size: selective adsorption of H₂S and low molecular weight mercaptans
• Suppression of COS formation: preventing H₂S from reacting with CO₂ inside the pores
• Regeneration capability: regeneration temperature below 350 °C, good economics
• High adsorption capacity: effective deep desulfurization
• High mechanical strength: suitable for high pressure natural gas/LPG systems
• Excellent thermal stability: resistant to multiple regeneration cycles
▎Typical Applications
• Removal of H₂S and mercaptans from natural gas (NG)
• Desulfurization and purification of liquefied petroleum gas (LPG)
• Preventing the risk of COS formation in downstream processes
• Purification of light hydrocarbons and ensuring gas quality during pipeline transportation
• Protective layer for desulfurization of petrochemical feed gas
▎Packaging
125 kg / steel drum
▎Storage precautions
• The product should not be stored outdoors. Storage should be carried out in dry conditions in sealed packaging, avoiding the absorption of moisture and impurities from the air.
• After a certain period of adsorption, regeneration is required. The recommended regeneration temperature is not higher than 350 °C to ensure optimal restoration of properties and service life.
▎Frequently Asked Questions
Question: Why does HYZ05B avoid COS formation?
Answer: When purifying natural gas, H₂S and CO₂ easily react at the acid sites of conventional molecular sieves to form COS, which is a difficult impurity to remove in subsequent processes. HYZ05B, through precise molecular sieve separation with 5 Å pore size and control of surface acidity, reduces the co-adsorption and contact of reactants within the pores, thereby effectively suppressing the side reaction of COS formation.
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