1. Utilizing green gas to its full potential
Biogas upgrading with the DMT-Carborex®-MS system
Utilizing green gas to its full potential
Using high selective membranes
R. Lems M.Sc. , R&D Manager
DMT Environmental Technology

2. Why biogas upgrading? Digester CHP Power 40% Heat 60% Biogas
Gas treatment
(desulphurisation)
CHP
Power 40%
Heat 60%
Digester
Gas
Treatment
(upgrading)
Green gas
(CBG:
Compressed
BioGas)
Biogas
Mobility
Natural gas grid

3. Choice for biogas upgrading?
Large Scale >500Nm3/hr
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

4. 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

6. Availability and OPEX

7. Membrane separation
CO2
Biogas
CH4

8. Membrane life time

9. 100/100
60/98
10/93
40/2
5% slip
50/5
10% slip

11. Multi stage

12. Membrane Cascade for upgrading
Competing membranes
High Selective
membranes
Biogas:
CH4 (53,3%)
CO2 (46%)
H2O (0,1%)
N2 (0,5%)
O2 (0,1%)
Mixer
Recycle
Stream
Membrane Cascade for upgrading
Biomethane
CH4 > 97%
OFF Gas
< 0.5% CH4

13. 10-16 bar

15. Utilisation of Biogas

16. Utilisation of Biogas

17. Biogas upgrading with high selective membranes is the way to go.
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
% flow flexibility

18. “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

19. Electric and thermal power consumption

20. Case
580 Nm3/hr, 54% CH4, 500ppm H2S
97% CH4 CBG, <0,5% CH4 emissions
12y at 7%, 0,07euro/kWh
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

21. 348.283 434.641 548.419 MS PWS PSA Investment (upgrading) 1.040.000 €
Investment (constr.)
30.000
55.000
80.000
Investment (off gas) -
Total Investment
Depreciation (12y)
89.167
Interest (7%)
45.548
59.809
67.258
€/a
Power (0,07 eur/kWh)
73.111
83.555
85.153
Consumables (AC/MS)
57.000
22.500
27.541
Maintenance
23.300
25.000
28.500
Staff
3.600
14.600
13.000
Methane loss (slip)
11.130
21.696
62.443
Methane loss (availability)
45.427
90.398
Total

22. Selectivity: How good is the separation
Permeability: How fast is the separation
CH4 Recovery: How much do you lose

23. 60
DMT-HS Membranes