1. confidential
Confidential
Biological Methanation
An Industrial-Scale Application for Energy Storage, CO2 Reuse
and Renewable Fuel
Arianne Bhérer-Breton
Carbon Capture Summit 2022
June 22-23rd 2022

2. confidential
A Scalable and Simple 2-Step System Design
2
Electrolysis Methanation
BioCat Methane
Water
Carbon dioxide, landfill gas,
Industrial CO2 sources
Water
Heat
Hydrogen
Electricity
Inlet gas
Outlet gas

3. confidential 3
The Archaea Transform Every Molecule of CO2 into Molecule of
CH4 Without Using Fossil Fuels
The methane is synthesized in each
cell of the biocatalyst. There are
trillions of cells working to produce
methane in the reactor.
The biocatalyst is a single-
celled microorganism that
belongs to the domain of
Archaea.
The cells are self-
replicating in the reactor,
as such, the system can
sustain itself.
CO2 + 4 H2 CH4 + 2 H2O + Heat
carbon hydrogen methane water
dioxide
4 H2O + e- 4 H2 + 2 O2
water electricity hydrogen oxygen
Electrolysis is the
process that produces
hydrogen.
Renewable hydrogen is
synthesized in the electrolyzer
from water and renewable
electricity.
Methanation
Electrolysis
Carbon
Dioxide

4. confidential
Renewable Gas Charges our Largest Battery: The Gas Grid
4

5. confidential
Electrochaea’s Rapid Technology De-risking and Scale-up
5
2006 – 2010 2011 – 2012 2013
0,05 Nm3/h 2,5 Nm3/h
Basic
Research
Lab-Scale
Field Trial
Pre-Commercial
Field Trial
2019 – On-going
2019 – 2020
2016 – 2019
Up to 50 Nm3/h 500 - 2500 Nm3/h
Commercial
Plants
2020 – On-going
Technology Validation Commercialisation
Industrial-Scale
Pilot Plants
CO2
Conversion
x 50 x 20 x 10 - 50

6. confidential
Investment in Electrochaea
• Baker Hughes’ Expanding CCU Portfolio:
o Baker Hughes has announced several investments in CCU (carbon
capture utilization) over the last several months, including acquisition of 3C
and a technology license from SRI.
o These investments build on an existing portfolio of technologies, especially
chilled ammonia.
o These technologies will offer applications in a wide range of industries,
including CO2 from biomass, waste-to-energy plants, and fossil-fuel
combustion.
• Energy Industry – Core Capabilities:
o Power generation efficiency, uptime
o Compression performance
o Industrial controls, cybersecurity
• Baker Hughes’ investment strengthens Electrochaea’s position as a leading provider of Power-to-Methane
technology for carbon and energy storage.
• Baker Hughes and Electrochaea will jointly develop and commercialize an innovative integrated carbon capture
and utilization solution for specific applications utilizing both biogenic and industrial CO2 sources.
Click Here for Press Release

7. confidential 7
Unique Features of Electrochaea’s Technology
*VVD = volumes of gas per volume of reactor per day (24-hr)
Unique Biocatalyst
• Patented strain
• Optimized methane productivity (20 x incease)
• Outstanding robustness
• Fast start/stop cycles
Productive 98.6% of carbon goes into methane
Effective VVD* of 850, H2 mass-transfer limited
Responsive Quick return to methane production within seconds/minutes
Selective 100% methane, no intermediates
Robust Tolerant to oxygen, H2S, CO, sulfate, ammonia, particulates
Simple Moderate temperature range (60-65°C) and pressure (1-10 bar)
Proprietary Patented biocatalyst developed by L. Mets is licensed exclusively to Electrochaea by the University of Chicago
(c) Prof. Klingl

8. confidential
Electrochaea Demonstrated Feedstock Flexibility in Fisrt Pilot
Projects
8
50 Nm3/h CO2
1 MW electrical
power
BioCat Methane
50 Nm3/h
Grid
Injection
50 Nm3/h CO2
(from biogas)
1 MW electrical
power
BioCat Methane
50 Nm3/h
Grid
Injection
75 Nm3/h CH4
(from biogas)
Biomethane
75 Nm3/h
Heat
320 kW
200 Nm3/h H2
Heat
320 kW
200 Nm3/h H2
CO2
Operation
Biogas
Upgrade Biogas
Horizon 2020 funding

9. confidential
8 kg/h H2
Ramp from
0 to 8kg/h
H2 within
10 min
8,5 kg/h
5 kg/h H2
Lowest point = 98%
CH4, left over 1,6% H2
and 0,4% CO2
Electrochaea’s biocatalyst is robust and produces grid quality gas through start-up, turndown and
turnup of the methanation process in minutes, without post-reactor gas purification
Highly Flexible and Responsive System Operation
9
CH4 100%
CO2 kg/h
H2 kg/h
❶ Start-up within minutes, CH4 production achieves designed scale of the test performed
❷ Ramping down H2 and CO2 flow, no change in product gas quality
❸ Ramping up H2 and CO2 flows, no change in product gas quality
❹ CO2 conversion is not affected by change in input flows
❹
❶
❷
❸
❶ CH4 100%
Store&Go project, Switzerland

10. confidential
Impact of a 100 MWe Biomethanation Plant
Renewable energy
CO2
BioCat Methane
CO2 mitigation
Renewable thermal energy
* Assumptions:
• Heat and electricity for one year 3,200 kWh in a household with 4 person in Germany (2013)
• Consumption average CNG car: 4.5kg CNG/100km, yearly distance: 15 000km/year
• 8,000 h/a of operation, electrolysis included
• One beech tree binds 12,5 kg CO2/year
• CO2 emissions calculator www.atmosfair.de
800 GWhe + 74,000t CO2 100MWe BioCat® methanation system 5000 Nm3/h of BioCat Methane
59mn km with 1 CNG car
(~1500x around the world)
CO2 Mitigation of ~5.9mn
trees
yearly consumption of
~4,000 CNG cars
Re-utilization of resources Reduction of CO2 footprint
energy of ~250,000
households
~41,000 passengers
flying from London to NY
10

11. confidential 11
Value Creation with Synthetic Methane
Carbon tax, penalty avoidance (e.g., EU jurisdictions)
Delivery of gas for injection on grid, refueling transportation,
or on-site industrial consumption
Energy Storage
Storing renewable energy as RNG on the gas grid
overcomes inherent constraints on renewables,
delivering value to electric grid balancing
requirements
Carbon Attributes
Numerous incentive programs support investment
in the low carbon intensity (CI) delivery of RNG
Capex Avoidance
Utilities’ integrated resource plans (IRP) can be
achieved with lower capex; renewable utilization
rates are enhanced with mitigated curtailment
Sale of Gas
As a drop-in replacement for fossil gas, the
delivery, sale and consumption infrastructure is
ready for RNG Voluntary PPAs
Carbon certificates, trading and fuel-associated tax
incentives (e.g., CARB LCFS and US EPA)
RNG-enabled generation capacity for electric power (e.g.,
resource adequacy (RA) contracts)
Otherwise curtailed or exported renewables → stored for
delivery across hours, seasons, geographies
Long-term storage & charge/discharge cycles – not limited
to short cycle limitations of Li-ion batteries
Renewables utilization rates enhances asset values and
stimulates continued investment in renewables generation
Offsetting use of fossil gas and resulting GHG emissions

12. confidential 12
Electrochaea – The Team
Chief
Operating Officer
CTO &
Managing Director
Doris Hafenbradl,
PhD
Harald
Beschid
Joe Feldman
Mich Hein,
PhD
CEO &
Managing Director
EVP, N. American
Bus Dev
Director of Product and
Commercial
Development
Liam
Bansen
Aafko
Scheringa
Senior
Director
Sales
Birgit
Lewandowski
Development
Director
Arianne
Bhérer-Breton
Chief Investment
Officer
Peter
Plesner
Business
Development
Director
VP Business
Strategy
Gabriele
Pinzone
Jon Dyar
Boles
Sales
Manager
VENTURE INVESTORS
STRATEGIC INVESTORS
Swiss-based utility with significant
renewable energy interests
Europe‘s leading gas storage
company; unit of ENGIE
Global energy technology company

13. confidential
Mich Hein
Managing Director,
CEO
Arianne Bhérer-Breton
Business Development
Manager
Gabriele Pinzone
Business Development
Director
Aafko Scheringa
Senior Sales
Director
mich.hein
@electrochaea.com
+49.162.486.2002 (Germany)
+1.773.241.4947 (US)
arianne.bherer-breton
@electrochaea.com
+49.176.220.266.26 (Germany)
gabriele.pinzone
@electrochaea.com
+49.1523.461.0303 (Germany)
aafko.scheringa
@electrochaea.com
+31.6207.05747 (NL)
www.electrochaea.com
Electrochaea GmbH
Semmelweisstrasse 3
Planegg – Steinkirchen 82152
Germany
Electrochaea.dk ApS
DTU Link, Risø Campus, B-108
Frederiksborgvej 399
4000 Roskilde
Denmark
Electrochaea Corporation
500 Capitol Mall
Suite 1900
Sacramento, CA 95814
US