1. High selective membranes
Future of (small scale) biogas upgrading
R. Lems M.Sc. , R&D Manager
DMT Environmental Technology
Rlems@dmt-et.nl
2. Thema C- Biogas Utilization
Focus biogas upgrading + transportation
DMT: Development small scale upgrading
Clean Miles: Development virtual pipeline
Eneco: Case development
Hanze: Research and Support
4. Choice for (large scale )biogas upgrading?
PWS: Pressurized Water Scrubbing
+ Low investment and operational cost
+ Low methane slip 0.8 %
+ High energy efficiency >96%
+ Proven technology
+ No chemicals
- Complexity
5. Choice for small scale biogas upgrading?
Importance of
•Energy efficiency ?
=>Biogas utilization and running hours.
•Flow variations ?
=>Max flow is 200m3/hr
•Available manpower
=> None
•Methane emissions ?
6. Choice for small scale biogas upgrading?
MS: Membrane Separation
+ Compact
+ Simple on/off
+ Cheap
+ 100% biogas utilization/ flexibility
+ Highest operational up time
+ 2 times per year human interaction.
+ CO2 reuse
- High methane slip (conventional)
7. Why small scale biogas upgrading?
>90% of possible biogas production sites are <200m3/hr.
60-80% of possible biogas capacity is from small scale site.
50-200Nm3 biogas equals 35-150 l diesel
=> 170.000-1.450.000 euro/a
9. Membranes separation
J= (k . D . Δp ) / l
J= Flux
k= Solubility of CO2 in the polymer
D= Diffusion coefficient of CO2
through the polymer
Δp = The pressure difference
over the membrane
l = The thickness of the membrane
14. Biogas:
CH4 (53,3%) 35% recycle
CO2 (46%) Mixer
H2O (0,1%)
Recycle
N2 (0,5%)
O2 (0,1%) Stream
Membrane Cascade for
upgrading
Biomethane OFF Gas
CH4 > 97% < 0.5% CH4
15. Choice for (small scale) biogas upgrading?
MS: Membrane Separation
+ Compact
+ Simple on/off
+ Cheap
+ 100% biogas utilization
+ Highest operational up time
+ 2 times per year human interaction.
+ CO2 reuse
+ Low methane slip ( High selective )
16. DMT Carborex ® MS
+ 0,2 kWh/ Nm3
+ 0,3% CH4 slip
+ Energy efficiency > 98%
+ Operation reliability >98%
+ Plug and play
+ Containerized
+ Low in CAPEX and OPEX
- Price linear with membranes
22. Virtual pipeline
• For remote places and low flows (where pipeline are too expensive)
• Easy transport and utilization of gas @ 250 bar
• Transport of biogas and/ or greengas
• Alternative for local use of CBG (mobile CHP/ holiday houses)