Chemical Biogas Scrubber – Chemical DeSulphurization Process
The chemical biogas scrubber offered by AquaThane utilizes an advanced Chemical Desulphurization Process, that operates on the principle of transferring gaseous hydrogen sulfide (H₂S) into the liquid phase:
H2S (g) ↔ H2S (l)
Once dissolved, H₂S reacts with hydroxide ions (OH⁻) from caustic soda, undergoing the following transformations:
H2S (l) + OH– ↔ HS– + H2O
HS– + OH– ↔ S2- + H2O
This process efficiently removes H₂S from biogas by converting it into sulfide (HS–) and sulfide ions (S2-) in the liquid phase.
Our biogas scrubbers can be tailored to meet specific operational needs, available as single-stage systems (with or without a pre-scrubber) or double (multi-stage) scrubbers. Including a pre-scrubber in the system offers significant operational advantages, allowing the main scrubber to maintain a lower pH compared to traditional single-stage systems.
This optimized pH control offers several advantages:
- Reduced COsub>2 consumption, as lower pH levels in the main scrubber decrease the need for chemical adjustments.
- Minimized precipitation of solid salts, reducing clogging risks and ensuring reliable system performance.
Key characteristics:
- Low consumable usage: efficient design ensures minimal consumption of chemicals and water.
- Standardized skid-mounted unit: facilitates quick installation and easy integration into existing biogas processing facilities.
- Compact and robust construction: space-saving design with durable materials for long-term operation.
- Low capital investment: cost-effective solution with high performance and low operational expenses.
- Optional integrated gas drying and conditioning unit: improves final gas quality by removing moisture and impurities.
