The DMT Carborex® PWS Biogas upgrading0 pages

Carborex® PWS
> Total solution for Biogas upgrading
> Easy removal of CO 2 , H 2S and H 2O
Standard system for upgrading biogas
to natural gas quality
Why use DMT Carborex® PWS?
High methane enrichment
without chemicals
The Basic Process
The DMT Carborex® PWS is a complete solution
• Methane slip less than 1%
a ‘pre-filter’ or in the final air treatment using a
for removing CO2, H2O, H2S and various other
• High gas quality - up to 98% CH4
biological system.
pollutants from biogas generating minimal waste
• Flexible throughput
streams. Natural gas quality is mainly achieved
Gas quality is continuously monitored by
• High energy efficiency
in two stages: first methane enrichment through
measuring the Wobbe index, CO2, CH4, Caloric
high pressure CO2 absorption (± 4 bar); secondly
value, H2S and dew point. To ensure overall
removal of contaminants and gas drying in the
• No chemicals
maximum energy efficiency, heat from the
• Small footprint
dryer / polishing process. A flash vessel with
compressor is used for the dryer and for heating
• Easy to operate
a circulating flow is used to minimise CH4 loss
the digester.
and water is regenerated in the absorber by air
stripping. CO2 is also stripped from the water into
the air and H2S can either be removed through
Options
Absorber
• Propane / nitrogen / THT injection
• Gatekeeper for grid injection
• Vehicle - fuel station
• Heat pump system
• CO2 Liquefaction
Elimination H 2S
Compressor
Biogas
• Afterburner, catalytic oxidation
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