Green hydrogen

Green hydrogen is an energy vector capable of storing, transporting and distributing energy from renewable sources, making it a fundamental tool in the clean and sustainable economy of the future. 

Spain is consolidating its position as the European country with the greatest potential for green hydrogen production and is now eligible for aid for its installation through the H2 Pioneers Programme of the Recovery, Transformation and Resilience Plan.

The characteristics of its production, transformation and use process make green hydrogen a sustainable, reliable, competitive and zero-emission way of harnessing energy.

Hydrogen types

Depending on the origin of the hydrogen and the pollutant gas emissions inherent in its production processes, there are four types of hydrogen:


It comes from coal gasification, the most polluting form of hydrogen.


It is obtained from the steam reforming of natural gas when there is no CO2 capture.


It is generated from steam reforming of natural gas with subsequent CO2 capture.


It is obtained from the electrolysis of water powered by energy from renewable sources.

Currently, more than 90% of the hydrogen used is grey and comes from fossil fuels. However, in order to comply with international decarbonisation agreements, the market trend is shifting towards green hydrogen.

At Cobaltiq, we are committed to the planet and society, which is why we are experts in green hydrogen.

Green hydrogen production

Green hydrogen is obtained from the electrolysis of water, a chemical process that breaks down water molecules into H2 and O2 using electrical energy from renewable sources, without polluting emissions of any kind. Electrolysis is produced with the help of an electrolyser, which uses a stack of conductors, a membrane and the application of an electric current to separate the water molecules.

There are various types of electrolysers that can be used to obtain green hydrogen:


They use a liquid electrolyte solution and the resulting hydrogen is of medium purity. It requires very bulky equipment.


It uses a solid ceramic material as electrolyte and obtains high-purity hydrogen. The process is highly efficient but requires temperatures of between 500ºC and 850ºC, which makes the operation very expensive.


They use a solid polymer electrolyte in the form of a thin membrane that the ions pass through during decomposition. They are the most widespread because they produce high purity hydrogen that is easily cooled. The process is costly but the most cost-effective, and they are also the electrolysers with the fastest response to power variation, which makes them ideal for renewable energies.

At Cobaltiq we work with PEM electrolysers as they are the most competitive on the market and have the best ratio between efficiency and profitability.

Green hydrogen applications

The development of green hydrogen is expanding and there are many fields of application for this technology:


After electrolysis, the resulting hydrogen can be compressed, either in liquid or gaseous form, or it can be stored in the form of metallic hydrocarbons. This allows it to be stored for long periods of time and transported over long distances and makes it an ideal replacement for traditional renewable energy storage batteries.


Due to its high energy density, light weight and fast refuelling capability, hydrogen is the perfect fuel for both light and heavy-duty vehicles, allowing a long range.


The use of hydrogen is very common in the chemical industry as a raw material to obtain ammonia or methanol, in the petrochemical industry to transform heavy crude oil into refined fuels, in the metallurgical industry to improve finishing or welding processes, and in the energy industry as a fuel in gas-fired power plants.


Once the hydrogen has been obtained and stored, it can be transported to consumption points where it is transformed by an electrochemical reaction with oxygen into electrical energy in a hydrogen cell, resulting in only water as a by-product. This generated energy can then feed the electrical requirements of buildings, industrial complexes if developed on a large scale, or electric vehicle engines.

Because of the endless opportunities presented by the development of hydrogen, the wide variety of applications it has and the benefits of its use, at Cobaltiq we are strongly committed to this technology, which in a few years will revolutionise the electricity market and become a fundamental part of the energy sector.

Green hydrogen advantages

In addition to the flexibility of uses of green hydrogen, other advantages of its integration into the energy mix are:

High purity hydrogen is obtained from electrolysis, which avoids secondary treatment and incurs no conditioning costs.

It has a high energy density per unit mass, much higher than traditional fossil fuels, which gives it a high energy storage capacity.

It is easily transportable and does not emit greenhouse gases at any stage of the process, its procurement, storage and use are clean and sustainable, in line with the Paris Agreement, the Sustainable Development Goals and decarbonisation targets.

Thanks to innovation and research, much progress has been made in making the process cheaper and more efficient, increasing the cost-effectiveness of the process and making green hydrogen the key to the energy future.

Hidrogeno el futuro del combustible

The European Union is strongly committed to this technology, providing companies and citizens with substantial subsidies for its installation. It is time to be a pioneer and invest in green hydrogen.

Cobaltiq is a specialist in green hydrogen

We advise our clients to incorporate this technology into their renewable generation portfolio and achieve maximum profitability by taking advantage of this great opportunity.

At Cobaltiq we offer you:

  • Study of the thermal or hydrogen needs depending on the objective and application of H2
  • We act in all stages of a project, from preliminary design, detailed engineering and installation to project start-up.
  • Turnkey renewable generation project or negotiation of an associated PPA.
  • Hydropower stations

At Cobaltiq we have developed PPASquare, where we connect producers and consumers interested in entering into a renewable energy or green hydrogen PPA.

In a quick and easy way you can agree with a producer to supply your thermal needs from green hydrogen or you can become a supplier.

As specialists in renewable energy and energy storage, Cobaltiq is the best choice to study, process, design and implement your green hydrogen project.



Zurbano street 63

28010 Madrid

t: +34 910 606 487