Fast and secure sequestration of CO2

The CarbFix project at ON Power‘s Hellisheidi Geothermal Power Plant has received international prominence following a publication on its findings in Science magazine. Mineralization of CO2 proves to be much faster than previously thought.

It is possible to permanently store CO2 as minerals in basaltic rocks and over 95% of CO2 injected is mineralized within two years, instead of centuries or millennia as previously thought. These are the conclusions of an article published today in Science, one of the most widespread and best known science journals in the world. The article focuses on the CarbFix project that has been in progress at Hellisheiði power plant since 2007.

Following the scientific magazine‘s publication on June 10th 2016, various prominent media outlets covered the project, including New York TimesThe Guardian and Washington Post.

The main author of the article is Jürg Matter, one of many scientists that have worked on the project. The project manager is Dr. Edda Sif Pind Aradóttir, a scientist at department of R&D at Reykjavik Energy (OR). OR has been the main sponsor of the CarbFix project since its beginning. Numerous scientists, skilled workers and technicians from OR have participated in the project, and at later stages, personnel from ON, OR’s subsidiary.

A primary goal of the CarbFix project is to apply the natural CO2 mineralization process already observed in basaltic rocks. Reducing industrial CO2 emissions is considered one of the main challenges of this century. By capturing CO2 from variable sources and injecting it into suitable deep rock formations, the carbon released is returned back where it came from instead of releasing it to the atmosphere.

To address this challenge, the CarbFix project is designed to optimize industrial methods for mineralizing CO2 in basaltic rocks through a combined program consisting of, field scale injection of CO2 charged waters into basaltic rocks, laboratory based experiments, study of natural analogues and state of the art geochemical modeling. A second and equally important goal of this research project is to generate the human capital and expertise to apply the advances made in this project in the future.



Visit the Geothermal Energy Exhibition

ON Power´s Geothermal Energy Exhibition at Hellisheiði Power Plant is an exploration into the utilization of geothermal energy in Iceland.

The Hellisheiði Power Plant is a great example of how geothermal energy can be utilized in a sustainable manner and is a showcase for geothermal’s global role in a renewable and sustainable future. The exhibition is open every day from 09:00-17:00.

More information about the exhibition

Join us on Facebook!

Generic Image

ON Power Receives Environmental Award

ON Power recently received SA-Business Iceland´s Environmental Award for establishing a network of fast-charging stations for electrical cars.

The first fast-charging station was set up in March 2014.  As of October 2015, ON Power operates a total of ten fast-charging stations in Reykjavik and other locations in the southwest part of Iceland.


Generic Image

ON Power and Silicor Materials Sign a PPA

ON Power (ON) and Silicor Materials have signed a PPA for 40 megawatts of electricity to the US company's project at Grundartangi, Iceland, which will produce solar-grade silicon.

The agreement raises the price of ON’s renewable energy significantly and it is not linked to the price of the product's buyer.

Paul Erland, CEO of ON Power: "This is a good deal for ON Power. First, we ensure the sale of the energy that was unsold. Second, we get a significantly higher price it. Third, we reduce risks, both by excluding energy transmission from the contract and the price is not related to product prices. It is also positive that our green energy production is now utilized for furthering generation of renewable energy in the world."

Terry Jester, Chairman and CEO Silicor Materials: “It is important to Silicor to produce its environmentally friendly solar silicon here in Iceland using clean, renewable energy. We are pleased to reach a power purchase agreement that is beneficial to both our company and to ON, and we look forward to a successful long-term collaboration.”

Generic Image

Outdoor Activities

The Hellisheiði Geothermal Plant is located at Hengill - a popular recreational area. Hiking trails, with a combined length of over 100 km, provide great scenery, including hot springs and warm rivers. The Hengill area provides an excellent opportunity to experience Iceland´s nature.  

Hellisheiði Geothermal Plant


Guests can enjoy light refreshments in our café, located on the 1st floor. We also offer accommodations for meetings, events and receptions. Please contact syning@on.is for inquries.


There are ample parking spaces available outside of the main entrance.  The building is on three floors with two large elevators located in the lobby, thus providing good access for disabled people.

Geothermal Energy Exhibition