Biogas upgrading plant

Provide solutions for biogas upgrading and liquefaction

Wärtsilä’s Puregas CA process recovers over 99.9% of the biomethane present in raw biogas by separating CO2 from the biogas through chemical adsorption. The selective organic solvents used are so efficient that the product gas also is highly suitable for direct injection into the gas grid without any enrichments. Together with the low need for gas pre-treatment, high availability and lowest power consumption the Puregas CA process provides plant owners higher project profitability. It’s even possible to capture the CO2 from the plant for industrial or food purposes, increasing revenue further.

Technical data

Power consumption <0.11 kWh/Nm3 biogas
>90% heat recovery (Anaerobic digestion plant, feedstock hygenisation etc.)
Designed for unmanned operation
Plant delivered in Factory Tested (FAT) and weatherproof modules, no extra housing needed
Methane recovery >99.9%
Availability >98%
Clean CO2 off-gas stream – suitable for upgrading to industrial or food purposes
Capacities in single plant layout range from 500 to 6,000 Nm3/h raw biogas
Delivery time to site is 8 to 11 months from order to operation

Applications

Our Puregas plant is used to upgrade biogas for:

Grid injection of renewable natural gas to the natural gas grid, providing gas to heating or industrial use
Compression into CBG/CNG/RNG, providing renewable gaseous vehicle fuel
Feeding to a liquefaction unit producing bioLNG/LBG for renewable liquid transport fuel

Key benefits

Well proven technology with multiple references
Highest methane recovery > 99.9% (methane slip <0.1%)
Lowest electricity consumption and operational costs (OPEX)
Short installation time at site
Heat recovery to anaerobic digestion plants
Robust process with minimal need for gas pre-treatment
No need for RTO treatment of the off-gas
No or minimal need for adding enrichments (propane) for grid injection
Clean CO2 gas for further treatment and revenue
Designed with a module-based plug and play philosophy – making relocation possible

Introduction to the efficient future of biogas upgrading

Case studies

Biogas upgrading plants in US

Wärtsilä has extensive experience with digester biogas upgrading

Biogas image lift — Innovation in Biogas Upgrading

Biogas solutions providing flexible, cost effective, renewable energy to off grid customers tackling fuel poverty

Biogas is Booming in Denmark image lift — Biogas is Booming in Denmark

Wärtsilä have recently supplied four biogas upgrading plants to inject biomethane into the Danish natural gas grid

More Biogas image lift — Europe Needs More Biogas

Wärtsilä have recently supplied four biogas upgrading plants to inject biomethane into the Danish natural gas grid

Contact our 24/7 customer support at +47 815 48 500. For spare parts, please e-mail us with the equipment serial number or the name of the installation at moss-spares@wartsila.com (Inert Gas Systems) spares.wgs@wartsila.com (all other products)
For technical support & service, please email us with the equipment serial number or the name of the installation at services.wgs@wartsila.com.
Equipment serial number is taken from the equipment nameplate and includes all letters and numbers as given on the equipment nameplate.

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