Transcript Biogas_upgrading_with_the_Carborex_MS_system_v2

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
[email protected]
Why biogas upgrading?
Gas treatment
(desulphurisation)
CHP
Power 40%
Heat 60%
Biogas
Digester
Gas
Treatment
(upgrading)
Green gas
(CBG:
Compressed
BioGas)
Mobility
Natural
gas grid
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
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
Membrane separation
CO2
Biogas
CH4
Membrane life time
100/100
60/98
10/93
40/2
5% slip
50/5
10% slip
Multi stage
Biogas:
200,0%
CH4 (53,3%)
CO2 (46%)
H2O (0,1%)
N2 (0,5%)
O2 (0,1%)
180,0%
Mixer
Recycle
Stream
Membrane Cascade for
upgrading
Recylce Stream %
160,0%
Competing
membranes
140,0%
120,0%
100,0%
80,0%
High Selective
60,0%
membranes
40,0%
20,0%
0,0%
10
20
30
40
50
Membrane selectivity CO2/CH4
Biomethane OFF Gas
CH4 > 97%
< 0.5% CH4
60
70
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
[email protected]
Electric and thermal power consumption
Case
1.
2.
3.
4.
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
Investment (upgrading)
Investment (constr.)
MS
PWS
PSA
1.040.000
1.100.000
1.250.000
30.000
55.000
€
80.000 €
250.000
250.000
€
1.070.000
1.405.000
1.580.000
€
Depreciation (12y)
89.167
117.083
Interest (7%)
Power (0,07 eur/kWh)
45.548
73.111
59.809
83.555
Consumables
57.000
22.500
27.541 €/a
23.300
25.000
28.500
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
Investment (off gas)
-
Total Investment
(AC/MS)
Maintenance
Staff
Total
348.283
434.641
131.667 €
67.258 €/a
85.153
548.419
€/a
€/a
€/a
• Selectivity: How good is the separation
• Permeability: How fast is the separation
• CH4 Recovery: How much do you lose
60
DMT-HS
Membranes