biogas upgrading with the dmt-carborex ® -ms system utilizing green gas to its full potential using...
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Biogas upgrading with the DMT-Carborex®-MS system
Utilizing green gas to its full potentialUsing high selective membranes
R. Lems M.Sc. , R&D Manager
DMT Environmental Technology
Rlems@dmt-et.nl
Why biogas upgrading?
Digester
Gas treatment(desulphurisation)
GasTreatment(upgrading)
Green gas(CBG: Compressed BioGas)
Mobility
Power 40%
Biogas
Heat 60%
CHP
Natural gas grid
• PWS: Pressurized Water Scrubbing– Low investment and operational cost– Low methane slip 0.8 % – High energy efficiency >96%– Proven technology– Robust system– Flexible system– No chemicals
Choice for biogas upgrading?Large Scale >500Nm3/hr
Choice for biogas upgrading?Small scale <750Nm3/hr
• MS: Membrane separation– Lowest investment and operational cost– Lowest methane slip <0,5% – Highest energy efficiency >98%– Highest operational up time – Plug & play configuration– Compact– Simple on/off– No chemicals and/ or water
Availability and OPEX
Biogas CH4
CO2
Membrane separation
Membrane life time
100/100
40/25% slip
60/98
50/510% slip
10/93
Multi stage
Biogas:
CH4 (53,3%)CO2 (46%)H2O (0,1%)N2 (0,5%)O2 (0,1%)
Mixer
Membrane Cascade for upgrading
BiomethaneCH4 > 97%
OFF Gas< 0.5% CH4
Recycle Stream
0,0%
20,0%
40,0%
60,0%
80,0%
100,0%
120,0%
140,0%
160,0%
180,0%
200,0%
10 20 30 40 50 60 70
Membrane selectivity CO2/CH4
Re
cy
lce
Str
ea
m %
Competing membranes
High Selective
membranes
10-16 bar
Utilisation of Biogas
Utilisation of Biogas
Conclusions
Biogas upgrading with high selective membranes is the way to go.
– Lowest CAPEX and OPEX– Lowest methane slip <0,2% – Highest energy efficiency >98%– Highest operational up time
- 0-100% flow flexibility
“Biogas upgrading with
the DMT-Carborex®-MS system”
Utilizing green gas to the full potential
R. Lems M.Sc. , R&D Manager
DMT Environmental Technology
Rlems@dmt-et.nl
Electric and thermal power consumption
Case1. 580 Nm3/hr, 54% CH4, 500ppm H2S
2. 97% CH4 CBG, <0,5% CH4 emissions
3. 12y at 7%, 0,07euro/kWh
4. CBG for 0,73 euro Nm3
MS PWS PSA
Availability 98% 96% 94%
Methane slip 0,5% 1% 3%
General literature values from users and suppliers. No guarantee values
MS PWS PSA
Investment (upgrading) 1.040.000 1.100.000 1.250.000 €
Investment (constr.) 30.000 55.000 80.000
€
Investment (off gas) - 250.000
250.000 €
Total Investment 1.070.000 1.405.000 1.580.000 €
Depreciation (12y) 89.167 117.083 131.667 €
Interest (7%) 45.548 59.809 67.258 €/a
Power (0,07 eur/kWh) 73.111
83.555
85.153 €/a
Consumables (AC/MS) 57.000 22.500
27.541
€/a
Maintenance 23.300 25.000
28.500 €/a
Staff 3.600 14.600
13.000
€/a
Methane loss (slip) 11.130 21.696
62.443
€/a
Methane loss (availability) 45.427 90.398
132.857
€/a
Total 348.283 434.641 548.419 €/a
• Selectivity: How good is the separation
• Permeability: How fast is the separation
• CH4 Recovery: How much do you lose
DMT-HS Membranes
60
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