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Koolen Industries invests in Proton Ventures

Koolen Industries invests millions in Proton Ventures

Schiedam, The Netherlands, 11 November 2019 – Dutch clean energy conglomerate Koolen Industries has invested 4 million euros in Dutch ammonia energy storage company Proton Ventures.

Proton Ventures designs and builds pressurized and cooled ammonia storage facilities, as well as small scale ammonia production facilities called NFuel units.

“Proton Ventures’ unique and patented technologies enable the production of ammonia using clean energy sources. Ammonia is an ideal storage solution for solar power plants and wind farms as it is particularly well suited to store and transport large amounts of energy in efficient ways. This makes it a perfect fit for Koolen Industries as we continue to push the global transition to clean energy,” said Kees Koolen, CEO, Koolen Industries.

Proton Ventures is currently involved in many renewable energy storage projects, which store clean energy in ammonia/NFuel. The company has large scale Ammonia storage projects operating in Estonia and Bulgaria The investment by Koolen Industries will help speed up Proton Ventures’ roll out of more NFuel units around the world.

“It is as important to us that Koolen Industries is present and active across the entire energy chain: from clean energy generation and storage, to the transportation and delivery of energy to the end customer. This creates great opportunities for ongoing cooperation and opens doors for us to bigger projects,” said Hans Vrijenhoef, CEO Proton Ventures.

NFuel for large scale energy storage
“Alongside our lithium and flow battery capabilities, ammonia adds value to our portfolio, especially with regard s to clean energy storage at large scale. This form of energy is relatively cheap, and it is easy to transport and import into the Netherlands or indeed to into other markets,” said Gerben Hilboldt, Chief Technology Officer, Koolen Industries.

“In principle, liquified ammonia contains more hydrogen per liter than conventional liquified hydrogen and it is easier to store and transport, which reduces the cost and thus makes imported clean energy affordable,” said Vrijenhoef.

With this form of energy storage, it is possible to store 25 times more energy by volume than even the most energy dense lithium batteries currently on the market.

How NFuel works
Traditionally, ammonia is made for the fertiliser industry, but it is an incredibly flexible energy storage solution. With the global transition to clean energy, we see this moving from top left to bottom right. Solar and wind energy will be used as raw material for the production of ammonia. This ammonia can be used as fuel (ships and freight traffic) or can be cracked back to energy.

About Proton Ventures
Proton Ventures is a technology company that works to make the global energy transition a reality. The company specialises in ammonia related technologies and products, including storage concepts for chemical and liquid energy carriers. Proton Ventures designs and builds pressurised and cooled ammonia storage facilities, as well as small scale ammonia factories called NFuel units.

About Koolen Industries
The mission of Koolen Industries is to enable everyone to contribute to the energy transition. By using clean energy from wind and the sun, and making sure it is available whenever you need it, they will provide consumers with a n autonomous life, independent of the grid.

Koolen Industries builds and invests in a group of companies that together will make sure renewable energy will always be available, whenever and wherever it is needed. Reliable and safe. Made possible by ingeni ous software.

Earlier this year Koolen Industries announced investments in Super B (lithium batteries), Floading Energy (charging infrastructure), Skoon Energy (cloud platform for renting mobile energy storage and mobile energy storage containers), Elestor (flow batteries) and Hardt Hyperloop (hyperloop technology). Koolen Industries also acquired BonGo Solar (solar panel installations) in October.


End press release

More information and images
Contact for more information:

Rianne Vriend Vrijenhoef
Proton Ventures
+31 10 426 72 75

Anne Koolen
Koolen Industries
+31 6 57 58 75 74

Meet us at WETEX 2019

Proton Ventures B.V. joins the Holland Pavilion at the Water, Energy, Technology and Environment Exhibition (WETEX) in Dubai – 21 October till 23 October 2019. WETEX is for us the perfect platform to display and discuss all issues related to building a sustainable environment.

Do we see you as well in Dubai to discuss how we can build a sustainable environment with our NFuel concept? You find us at booth P12

More information about WETEX 2019:

Strategic collaboration Proton Ventures and Duiker Combustion Engineers

Rotterdam, July 30 2019 – As of July 25th Proton Ventures BV and Duiker Combustion Engineers B.V. started a strategic collaboration. Companies will collaborate for, among other things, start-up of mini-ammonia plants in combination with the Stoichiometry Controlled Oxidation (SCO) technology developed by Duiker Combustion Engineers. S.C.O technology converts ammonia into high temperature heat.

Proton Ventures develops worldwide small-scale ammonia plants for conversion of wind and solar energy into ammonia. Duiker CE technology burns ammonia-rich streams in a furnace environment with very low NOx formation and without CO2 emissions. S.C.O. technology makes it possible to save fossil based energy and producing less CO2 and NOx emissions, because the ammonia containing fuels are oxidized in a controlled manner.

Hans Vrijenhoef, CEO Proton Ventures: “We like to collaborate with partners to complete the chain of using ammonia as an energy solution. This includes also power and heat generation and solutions for energy storage. The S.C.O. technology of Duiker CE opens new possibilities for us in applying local ammonia production from small to large scale, such as conversion of power plants to cleaner fuels while maintaining the existing installations. A combination of our expertise leads to this unique collaboration.”

Enter new markets

With this collaboration Duiker CE is also entering a new market. Currently, Duiker CE mainly operates in the (petro)chemical industry, where the S.C.O. technology has now proven itself technically and commercially. Albert Lanser, Duiker CE Business Development Director: “This collaboration offers us the opportunity to place our S.C.O. technology worldwide on the map in a completely different customer segment than we currently serve. Moreover, this S.C.O. technology is in combination with ‘green’ ammonia production unit capable of making a real contribution to the climate because ammonia does not emit CO2 during combustion. The collaboration with Proton Ventures, for example, has a reinforcing effect on the business proposition. After all, we can now offer the customer a total concept for making his / her heat demand or production process more sustainable.”

About Proton Ventures
Proton Ventures B.V. is an engineering company specialized in ammonia related technology and products. Proton is experienced in building and running pressurized and refrigerated ammonia terminals. Furthermore, it has experience in storage concepts for chemicals and liquid fertilizers for agriculture and horticulture. More information:

About Duiker Combustion Engineers
Duiker Combustions Engineers is specialized in development, design, supply, installation and maintenance of combustion systems for liquid and gaseous fuel processes for oil refining, chemical and natural gas processing industries. Thanks to more than 45 years of experience and highly qualified engineers, Duiker CE has built up a world-wide reputation with combustion- & process installations with excellent performance and is the market leader in designing and supplying process burners for installations that recover sulfur from H2S (SRU’s).More information:


End press release


More information and images
Contact for more information:

Proton Ventures B.V.
Hans Vrijenhoef
+31 (0)10 426 72 75

Duiker Combustion Engineers B.V.
Albert Lanser
+31 (0)174 282 700