Acid Wet Scrubber for Ethylene Oxide
Trevi’s Acid wet scrubber converts ethylene oxide (EtO) into ethylene glycol using a sulphuric acid solution as scrubber liquid.
Proven in more than 100 installations worldwide, it consistently achieves high removal efficiency across a wide range of EtO concentrations and gas flows.
Built for high loads
Handles very high EtO concentrations and variable gas flows.
Hazardous areas
Hazardous area compliant.
Low operator effort
Less than 4 hours of operator time per month.
Trevi’s Acid wet scrubber - AcEtO
Principle
Trevi's Acid gas scrubbing transfers EtO from the gas phase to the acid liquid phase with a subsequent hydrolysis of EtO into ethylene glycol.
Application
- Waste gases with low to very high concentrations of EtO.
- Waste gases with low to very high gas flows.
- Also suited for EtO/PO loaded waste gases coming from e.g. alkoxylation plants.
| Costs | Trevi's AcEtO | Catalytic Oxidizer |
| Investment cost | Moderate | High |
| Electricity cost | Low | Moderate |
| Fuel cost | None | Moderate-High |
| Water consumption | Low | None-Low |
| Catalyst/Acid replacement | Low | Low |
| Operation & Maintenance | Low | Low |
| Waste disposal | Moderate | None |
| Total monthly cost | Moderate | Moderate |
Ready to go acid-free?
An Acid Wet Scrubber can be converted to a Smart Wet Scrubber, which uses water instead of sulphuric acid.
Trevi did this, among others, for a three-stage acid scrubber at a sterilisation site in Thailand, with limited changes to the piping and three external reactor vessels. Outlet EtO stays below 10 ppb.
Want to know more?
Key Benefits
Flexible / Robust
- Operates at ambient temperature without fuel heating
- Can handle very high EtO concentrations
- Tolerates variable gas flows
- Low risk of instrumentation failure
Efficient / Reliable
- No warm-up time — immediate availability
- Automated liquid management in acid liquid phase (<1 hr changeover)
- Less than 4 hours of operator time per month
Safety
- Designed for use in hazardous areas
From EtO to glycol in three steps
Inside the Acid Wet Scrubber, a sulphuric acid solution absorbs Ethylene Oxide and converts it into glycol.
Speak to an EtO expert
Tell us about your EtO challenge, and we’ll help you find the right solution.
