BIOGAS

BIOGAS

Upgrade Biogas to Biomethane with Efficient Electrolytic H2

Biological methanation converts the CO2 fraction of biogas into additional methane using green hydrogen. IONZERA-equipped electrolysers provide the low-cost H2 that makes this process economical.

Membrane Cross-Section

PSU-TiO₂-GO
OH⁻OH⁻OH⁻PSU MatrixTiO₂GO SheetsPores350-410 μm

More Methane from Every Biogas Plant

Raw biogas contains 35-45% CO2. Adding green H2 via methanation converts this CO2 to CH4, increasing biomethane output by up to 70% without additional feedstock.

Lower H2 Production Cost

IONZERA's 3x lower area resistance reduces the cost of the hydrogen input, the primary variable cost in biological methanation, improving the economics of biogas upgrading.

Compact Electrolyser Integration

IONZERA's thin profile enables compact electrolyser stacks that fit within the footprint constraints of existing biogas plant sites, simplifying retrofit installations.

Biogas Upgrading with Green Hydrogen

Biogas produced from anaerobic digestion of organic waste typically contains 50-65% methane and 35-45% carbon dioxide. Conventional upgrading removes the CO2, wasting this carbon content. Biological methanation offers a superior alternative: adding green hydrogen to convert CO2 into additional methane via the Sabatier reaction, catalyzed by methanogenic archaea.

This process can increase biomethane output by up to 70% from the same feedstock, significantly improving the revenue of biogas plants. However, the economics depend heavily on the cost of electrolytic hydrogen, making electrolyser efficiency a critical factor.

Electrolyser Requirements for Biogas Plants

Biogas plants have specific characteristics that influence electrolyser and membrane selection:

Moderate scale typically 100 kW to 5 MW of electrolyser capacity, where membrane cost per unit area matters significantly
Often co-located with renewable generation (solar or wind), requiring dynamic operation capability
Distributed rural locations where compact, reliable equipment is essential
IONZERA's combination of low resistance, thin profile, and competitive pricing addresses all of these requirements

Nanocomposite Structure

PSU-TiO₂-GO
OH⁻OH⁻OH⁻PSU MatrixTiO₂GO SheetsPores350-410 μm
3x

Lower Resistance

20%

Thinner Profile

Circular Economy Benefits

By converting biogas CO2 to methane using renewable hydrogen, the combination of IONZERA-equipped electrolysers and biological methanation creates a truly circular energy system. Organic waste becomes a high-value energy carrier, renewable electricity is stored as biomethane, and CO2 is utilized rather than vented.

G-Hexa provides membrane solutions for biogas plant operators and technology providers looking to add hydrogen-assisted biogas upgrading to their operations.

Area Resistance

3x LOWER
Area Specific Resistance ComparisonIONZERA0.09-0.1 Ω·cm²Zirfon0.30 Ω·cm²00.10.20.3 Ω·cm²~3x Lower

Thickness

20% THINNER
Membrane Thickness ComparisonIONZERA350-410 μmZirfon500 μm500 μm scale20-30%thinnerThinner membrane = More compact stacks= Higher power density
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