C02 Removal from Bio gas stream
C02 Removal from Bio gas stream
(OP)
hi fellow process designers
i am interested to remove bulk CO2 from a biogas stream, to upgrade the gas to fuel quality.the flow rate desired for the 2 biogas upgraders is 50 and 150 scfm, there is a multistage high pressure compressor available that can deliver pressure to the process gas separation-treatment method, at any pressure from 1 atmosphere to 3500 psig,
the gas has this composition, all based on volume.
CO2 is 35%
Nitrogen is 2%,
Oxygen is 1.5 %
Water content, saterated at atmospheric pressure/and 100'F
H2S up to 1000 ppm, (can be removed before C02 removal (iron sponge?))
Methane - remaining volume.
i am aware that molecular gate (Guild) offers a solution though their system is upscale in terms of economics, vs the flow rate of gas to be treated
the desired CO2 content of less than 2 percent is preferred,
what alternative technologies are available, cost effective, other than engineered mole sieves and-or membrane technologies,
can anyone can put a dollar value per 50 scfm or issue an estimate what such a system would cost, ?
thank you
i am interested to remove bulk CO2 from a biogas stream, to upgrade the gas to fuel quality.the flow rate desired for the 2 biogas upgraders is 50 and 150 scfm, there is a multistage high pressure compressor available that can deliver pressure to the process gas separation-treatment method, at any pressure from 1 atmosphere to 3500 psig,
the gas has this composition, all based on volume.
CO2 is 35%
Nitrogen is 2%,
Oxygen is 1.5 %
Water content, saterated at atmospheric pressure/and 100'F
H2S up to 1000 ppm, (can be removed before C02 removal (iron sponge?))
Methane - remaining volume.
i am aware that molecular gate (Guild) offers a solution though their system is upscale in terms of economics, vs the flow rate of gas to be treated
the desired CO2 content of less than 2 percent is preferred,
what alternative technologies are available, cost effective, other than engineered mole sieves and-or membrane technologies,
can anyone can put a dollar value per 50 scfm or issue an estimate what such a system would cost, ?
thank you
Gordon Brand
www.OffenbarEnergy.com
NGV Solutions, sweet gas drying





RE: C02 Removal from Bio gas stream
ht
I have reviewed a basic design for this company and think it will fly.
Best regards
Morten
RE: C02 Removal from Bio gas stream
You could use off the shelf amine like mea too.
you must define fuel quality. burners can be adjusted or designed to handle the 40% inerts. Gas turbines can burn the gas as is as long as the H2S is removed. A reciprocating engine can be set up for as low as 600 BTU/CF.
RE: C02 Removal from Bio gas stream
Best regards
Morten
RE: C02 Removal from Bio gas stream
Regards M Pearce
RE: C02 Removal from Bio gas stream
The H2S and any SOx will be more of an issue to get to "pipeline quality" than CO2. An iron sponge will get you a good deal there, but usually pipeline requirements are 2-6 ppm, maximum.