Deoxygenation technology
Oxygen removal tech
Many applications require a biogas stream or a hydrogen stream that is ultra-pure with oxygen levels below 5 ppm. This is where our De.OXO technology comes in, which is easy to integrate with any biogas upgrader or downstream of any electrolyzer. At the core of HyGear’s De.OXO® systems is deoxygenation technology.
Features
- De.OXO Biogas: no TSA drying step needed as water is removed in the membranes of the upgrader.
- De.OXO Hydrogen: integrated TSA to remove water.
- Low maintenance.
- Low complexity.
- Technology that lasts a lifetime.
- High-purity, high-value gas.
- Integrated heat recovery for smart energy use.
Biogas: reactor as heart
Our De.OXO Biogas® is easy to integrate with any biogas upgrading system. The process starts with a catalytic reactor that converts oxygen into CO₂ and water. The system includes, among other things, a blower, heat exchanger, electric heater, and dry cooler. The outlet temperature is <45°C and pressure is up to 190 mbar(g) for direct feed into the main compressor.
A recuperative heat exchanger preheats incoming gas to reduce energy use. Oxygen levels are continously monitored. Unlike traditional systems, HyGear’s design operates upstream of CO₂ removal. This results in low-pressure operation, lower costs, and greater efficiency.
Hydrogen: integrated TSA
Our De.OXO Hydrogen® includes a catalytic reactor, two TSA vessels, a chiller, heat exchangers, an electric heater, water knock-out vessels, and oxygen analyzers.
Hydrogen first cools down to remove moisture,. Inside the reactor, oxygen reacts with hydrogen, forming water which reduces reducing oxygen levels to <5 ppmv. The gas is then cooled again to remove excess water before entering one of two TSA vessels, which further dries the hydrogen to <5 ppmv moisture.
The TSA system operates continuously, alternating between adsorption and regeneration (without blower) using a portion of the feed gas. Dew point and oxygen levels are constantly monitored.
