Technology

CS2 Removal from Petrochemical Naphtha

Achieve CS2 levels below 2 ppm in petrochemical naphtha with DWC Prime dividing wall column technology.

Economical removal of trace impurities is a major challenge in today’s refining and petrochemical complexes. One such challenge is carbon disulfide (CS2) contamination, which limits the feedstock flexibility of petrochemical naphtha (PCN). The presence of CS2 in PCN can cause corrosion in downstream cracker units and reduce the activity of hydrogenation catalysts.
CS2 Removal from Petrochemical Naphtha - Traditional vs DWC Technology approach diagram
DWC Innovations has successfully implemented its DWC Prime Dividing Wall Column (DWC) technology to achieve CS2 levels below 2 ppm in petrochemical naphtha products. The technology can be retrofitted into existing naphtha splitter or depentanizer columns, providing a cost-effective solution with minimal modifications to existing facilities.

Benefits of Using DWC Prime for CS2 Removal from PCN Product

  • Reduced Load on Naphtha Hydrotreating Units (NHT): Conventional approaches rely on naphtha hydrotreating for CS2 removal. With DWC Prime, on-specification PCN product is produced directly in the column, while the NHT unit treats only a concentrated CS2-rich side-cut stream.
  • Enhanced Profitability: DWC Prime also produces a premium gasoline product, creating an additional revenue stream and improving overall project economics.
  • Energy Efficient Operation: The Dividing Wall Column configuration is highly energy efficient and utilizes low-pressure (LP) steam as the heating medium, reducing utility consumption.
  • Lower CAPEX: Compared with adsorption-based CS2 removal technologies, DWC Prime offers significantly lower capital investment while delivering reliable impurity removal.
DWC Prime provides an innovative and economical solution for meeting stringent CS2 specifications in petrochemical naphtha while improving operational flexibility, energy efficiency, and overall refinery profitability. Learn more about Dividing Wall Column Technology.
Watch · 2:28

Cut CS₂ below 1 ppm — without a new unit

See how a DWC Prime revamp of the existing depentanizer takes petrochemical naphtha below 1 ppm CS₂ — and turns the light overhead into a premium-gasoline stream, instead of adding a new column or a costly hydrotreater.

  • Petrochemical naphtha at CS₂ below 1 ppm
  • 90% iC5 top cut — new premium-gasoline revenue
  • Retrofit into the existing column — CAPEX & OPEX cut 20–50%
DWC Prime - CS2 Removal from Petrochemical Naphtha

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