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PROJECT SILVERSTONE

Project Silverstone an innovative EU-funded project run by ON Power and Carbfix,
will deploy full-scale CO2 capture, injection, and mineral storage at the
Hellisheiði ON Power plant, reaching worlds first near-zero carbon footprint
geothermal power plant.



About

Technology

Questions and Answers

News

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ABOUT THE SILVERSTONE PROJECT

The Carbfix capture and injection demonstration plant has been operational at
Hellisheiði since 2014 injecting about 12,000 tonnes of CO2 annually. With the
addition of the Silverstone project, 34,000 tonnes of CO2 will be captured and
injected annually.

Project Silverstone is expected to reduce emissions by 150,000 tonnes over the
project lifetime.

This project alone will deliver 10% of Iceland's Climate Action Plan calls for
by 2030 within the energy and industrial sectors not covered by the EU ETS.




Through the project, a new CO2-optimised capture plant will be constructed
resulting in 150,000 tonnes of CO2 being mineralized.



Carbfix and ON Power, subsidiaries of Reykjavík Energy, have received a grant of
3.9 million euros from the EU Innovation Fund for the Silverstone project. The
project will scale up, design, and build an optimised Carbfix capture plant with
the capacity to capture about 34,000 tonnes of CO2 annually, which would
otherwise be emitted to the atmosphere. The new capture plant will be
commissioned in 2025.




THE TECHNOLOGY




The Carbfix technology was first developed at ON Power’s Hellisheiði site, in
collaboration with industry and academia since 2007. The technology imitates and
accelerates natural processes by rapidly turning CO 2 into solid carbonate
minerals underground. It is proven at the project site to be safe, efficient,
and environmentally friendly. By injecting CO 2 dissolved in water into basaltic
formations, it is rapidly transformed to minerals for permanent mineral storage.




QUESTIONS AND ANSWERS

What is Project Silverstone?

Project Silverstone will deploy full-scale CO2 capture, injection, and mineral
storage at the Hellisheiði ON Power plant, reaching worlds first near-zero
carbon footprint geothermal power plant.

The Carbfix capture and injection demonstration plant has been operational at
Hellisheiði since 2014 and has injected over 80,000 tonnes* of CO2. The
Silverstone Project will capture 34,000 tonnes of CO2 annually. Currently about
12,000 tonnes of CO2 are captured and injected at the site annually,
approximately one-third of the Hellisheiði power plant's CO2 emissions.

*data from 2022

How does the Silverstone project work and how does it affect the bedrock?

The Carbfix technology imitates and accelerates natural processes, in which CO2
is dissolved in water and interacts with reactive rock formations to form stable
minerals providing a permanent and safe carbon sink.

Young and fresh basaltic rocks are fractured and porous, but over time the pores
are filled by secondary minerals. The Carbfix technology accelerates this
process and utilises part of the pore space as storage space for CO2 in the form
of the stable carbonate minerals, such as calcite, which is a common mineral in
Icelandic bedrock.

The storage capacity for CO2 in young basaltic rocks is immense, with the
possibility of storing over 100 kg of CO2 per 1 m3 of rock. Furthermore, it has
been estimated that the injection of approximately 10,000 tonnes of CO2 per year
has been carried out at the Hellisheiði site since 2014 uses less than 0.01% of
the storage capacity of the reservoir.

When will the project start?

Started Desember 2021, injection will start January 2025.

How much CO2 will be injected?

34,000 tonnes CO2 yearly, 150,000 tonnes of CO2 during operational phase of the
Silverstone project.

What does Silverstone mean for Iceland's Climate Action Plans?

Emission reduction. The project has considerable scale up potential, providing a
significant impact for emission reduction within the geothermal sector. This
project alone will deliver 10% of the 55% emission reductions that Iceland's
Climate Action Plan calls for by 2030 within the energy and industrial sectors
not covered by the EU ETS. In addition, the technology is readily adaptable to
several hard-to-abate sectors, including steel and iron, cement, ammonia, and
waste management.

How is mineralization measured?

The mineralization of the injected gases is observed using tracers and by
following geochemical signals, both of which are monitored by the sampling of
fluids from wells in the vicinity of the injection point. Measured tracer
concentration in monitoring wells and mass balance calculations enable
evaluation of CO2 mineralization. The mineralization has also been quantified
using different isotopes.




NEWS


FRÉTTIR

News about the Silverstone Project



4. nov 2021

Orkuveitan

EUR 3.9 million EU Grant to Carbfix

Dirik Beckers, Director at the European Climate, Infrastructure and Environment
Executive Agency, and Edda Sif Pind Aradóttir, CEO of Carbfix, have signed a EUR
3,9 million grant agreement …

Read more



NEWS

Funded by the European Union. Views and opinions expressed are however those of
the author(s) only and do not necessarily reflect those of the European Union or
CINEA. Neither the European Union nor CINEA can be held responsible for them.



The Silverstone project is made by ON Power and Carbfix.

Silverstone by Carbfix and ON Power



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