Ethylene Compress and Molecular Sieve System

• • Ethylene producers are know to get less than three years when using knock-out pots and mist eliminator to protect the molecular sieve bed
• • Ethylene gas is compressed and exits the compressor
• • Hydrocarbons will condense into a very fine aerosol mist which is very difficult to separate with knock-out drums or packed vessels
• • Hydrocarbon condensates, and/or wash oils from the compressor, can greatly reduce performance and life of molecular sieve absorbent bed
• • Life of Molecular Sieve resin is largely dependent on the number of regeneration cycles it undergoes in service. Each cycle subjects the sieve to temperature rises and pressure decreases which vaporizes any hydrocarbon on the sieve and cracks the surface of the sieve. Cracks and fissures cause attrition and results in expensive replacement of Molecular Sieve material. 
• • Problems that can result are:
• • Frequent regeneration cycles
• • Adsorption performance loss
• • Premature replacement of Molecular Sieve material due to attrition and high delta pressure within bed
• • Higher energy costs
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Recommended Products:

• • A liquid/gas coalescer in ethylene gas lines after knock-out drums will remove virtually all of entrained liquids in gas, both hydrocarbons and aqueous aerosols as small as 0.1 micron