Presentation given at the Conference of the European Biogas Association 2014.

1. Standards development
for biomethane quality
specifications
at European Biogas Conference,
oktober 2014
Erik Büthker
Business Development Manager

2. Content
> CNG Net
> Role of standards
> Establishment of PC 408
Bio methane
> Preliminary results
> Time frame

3. CNG Net & LNG 24

4. CNG Net
> CNG Net is investing in a cleaner
future.
> CNG Net carries out the
exploitation of a network of
refuelling stations in The
Netherlands.
> CNG Net designs, build, finance,
maintain and operate the
refuelling stations at own risk.
> CNG Net is a total solution
provider.

5. Refuelling stations
> 57 CNG Net public
refuelling stations
> 120+ CNG refuelling
stations
> 2 LNG 24 refuelling stations
> 10 LNG refuelling stations
in total

6. The role of standards
> International accepted
safety level
• minimal safety requirements
• safety distances at refuelling station
> Standards are necessary to
introduce a “new” fuel to
get market acceptance
• clear specifications and test methods
• no trade barriers caused by local
regulations
> To overcome international
trade barriers
• refuelling coupling car/filling
station
• pressure levels for LNG storage
> International certification of
components and systems
• clear specifications and test
methods
• no trade barriers caused by local
regulations

7. International standard development

8. Establishment of PC 408

9. Establishment of PC 408

10. Goal EC
> Stimulate the introduction
of biomethane
> A European Standard for
biomethane to be used as
fuel for vehicle engines
> TS or EN for biomethane to
be injected into the grid

11. Scope PC 408
Upgrading
biogas from
digestion
injection into
the gas grid
Refueling station
Part 1 grid
specification
Part 2:
Automotive
Specification
biogas from
thermo chemical process
conditioning
Refueling station
Part 2 :
Automotive
specification
Natural gas Grid
Local dedicated
infrastructure
Non-grid sourced
natural gas

12. Current status
> first enquiry ended
> reviewing the comments
> four major challanges
> Wobbe range for L gas
> Sulpher content
> Methane number
> Silicon levels

13. Preliminary results
Parameter Injection group Fuel group
hydrocarbon dewpoint prEN 16726 (max -2 oC) max -2 oC
water dewpoint prEN 16726 (max -8 oC
at injection pressure)
max -10 oC at 200 bar Class A
max -20 oC Class B
max -30 oC Class C
Oxygen prEN 16726 (1% with
restrictions)
max 1 %
H2S + COS prEN 16726 (5 mg/m3) max 5 mg/m3
S total prEN 16726 (20 mg/m3
without odorant)
need for 10 mg/m3
CO max 0,1 %
Total Silicon research research

14. Preliminary results
Parameter Injection group Fuel group
Lower heating value min 39 MJ/kg - max 42.8 MJ/kg
Net Wobbe index prEN 16726 min 41,9 MJ/kg - max 49 MJ/kg
Net Wobbe index L gas min 35,0 MJ/kg - max 40,8 MJ/kg
Methane number prEN 16726 (min 65) min 65
Methane number dedicated spec. prEN 16726 min 80
Hydrogen prEN 16726 same text max 2 %
Compressor oil technically free
dust impurities technically free proposal < 5 micron dust
< 10 micron liquid
Chlorinated, Fluorinated compounds based upon health criteria

15. Values based upon Health
Criterea
Injection group
Preliminary results
Metals:
Arsenic 0.0041 mg/m3
Barium 0.11 mg/m3
Cadmium 0.0034 mg/m3
Chromium (Hexavalent) 0.00014 mg/m3
Chromium (Total) 0.00054 mg/m3
Nickel 0.014 mg/m3
Organo-chlorides [1] 1.0 mgCl/m3
Organo-fluorides [2] 3.5 mgFl/m3
Total S [3] 14 mgS/m3
Inorganic compounds:
Ammonia 5824 mg/m3
Aromatic compounds:
Xylene 13989 mg/m3
> Risk Assessment Methodology,
bases upon European research
carried out in UK (2012) and
France (2008)
> Health criterea assement will be
a separate Technical Report (TS)
> assessment /input needed from
other European countries

16. research on Silicon
> Limit values have to be set
> report on behaviour of silicon for domestic
boilers
> failure of ionization safety device
> clogging of stainless steel heat exchangers
> carried out in L gas situation
> research on behaviour of gas engines exposed
to silicon
> failure of spark plug
> sensors performance like Lambda sensors
> performance of catalist
> Silica build up in lubrication oil

17. Time frame
aug-­‐14
apr-­‐15
apr-­‐15
aug-­‐15
okt-­‐15
jan-­‐16
End
of
enquiry
TC/BT
decision:
2nd
enquiry
or
vote
if
vote
Final
draA
to
CMC
Start
of
vote
End
of
vote
PublicaFon
8,5
mont
hs
(treat
ment)
3,5
months
(translaFo
n)
2
months
(weighte
d
vote)
3
month
s
(treat
ment)
apr-­‐15
jul-­‐15
dec-­‐15
aug-­‐16
dec-­‐16
feb-­‐17
may-­‐17
if
2nd
enquiry
Enquiry
draA
to
CMC
Start
of
enquiry
End
of
enquiry
TC/BT
decision:
vote
or
deleted
Final
draA
to
CMC
Start
of
vote
End
of
vote
PublicaF
on
2,5
months
(translaFo
n)
5
months
(commen
ts)
8,5
month
s
(treat
ment)
3,5
months
(translaF
on)
2
month
s
(votes)
3
months
(treatm
ent)

18. Contact
Erik Büthker
Business Development Manager
e.buthker@cngnet.nl
+31 6 2150 1403
CNG Net
Ringwade 71
3439 LM Nieuwegein
The Netherlands