Featured Articles

With volatile renewable energy input on one end and stable hydrogen consumption on the other, electrolyser projects are stuck between a rock and a hard place. We explore the benefits and challenges of flexible electrolyser operation for a Dutch use case and propose to reconcile conflicting decarbonisation objectives: producing substantial volumes of affordable green hydrogen and integrating electrolysis into the renewables-based energy system of the future.

Sustainable aviation using green hydrogen as a fuel is in its infancy. The breadth of potential solutions is broad. The winning ideas may be known to us today or could yet emerge. However, the benefits of pursuing defossilisation in this sector will be felt in our lifetime and will leave a legacy that we can be proud of for generations to come.

Current hydrogen storage constraints mean there is no optimal solution for storing mid-range quantities of hydrogen. To respond to market demand, underground vertical hydrogen storage could be a game-changer for the hydrogen value chain.

In an exclusive interview with Hydrogen Tech World, Willem Frens, a seasoned business, project, and technology developer, shares his extensive knowledge and experience in green hydrogen and sustainable energy and process technologies. Mr. Frens discusses optimal locations for green hydrogen production, the importance of local offtake and export strategies, and advancements in electrolysis technologies. His insights provide a roadmap for the future of hydrogen production and the global energy transition.

Stiesdal Hydrogen, a subsidiary of the Stiesdal climate technology group, is paving the way for genuine industrialization of green hydrogen production. Founded in 2020, the Danish company has delivered the first three units of its 3.1-MW HydroGen Electrolyzer, offering not only a completely new approach to the overall electrolyzer arrangement but also a new take on alkaline technology that enhances flexibility and applicability. Hydrogen Tech World spoke with Esben Baltzer Nielsen, Head of Sales & Business Development at Stiesdal Hydrogen, to explore the company’s advancements.

We live on the Blue Planet, but even here freshwater is a scarce resource. Only2 % of all water in the world is freshwater, most of which is either locked away in glaciers at the poles or stored deep underground. This means that only a tiny fraction, 0.3% of the freshwater, is found in rivers and lakes. For water-intensive industries looking for sustainable water use, the dream is therefore to tap into the ocean and utilize the vast amount of seawater. In this article, the use of seawater for green hydrogen production is examined with a focus on the initial desalination step in the process towards ultrapure water. Key considerations and technical aspects are explored by answering essential questions like: Is seawater a viable source of water for green hydrogen? What are the water treatment issues when using seawater for green hydrogen? And should you opt for membrane-based reverse osmosis or thermal evaporation?

Iron Power represents a groundbreaking approach to energy production. By harnessing the power of iron as a fuel source, we are pioneering a sustainable alternative to traditional energy sources. This innovative technology not only promises to offer CO₂-free energy, but also offers a reliable and efficient solution to meet the world’s growing energy needs.

It is widely understood that the cost of renewable electricity is the main contributor to the levelized cost of hydrogen (LCOH) for green hydrogen projects. Improvements to the efficiency of the hydrogen-to-power process are therefore one of the most powerful levers available for improving cost competitiveness. This is especially true for electrolysers that are located in regions with relatively high electricity costs or for plants that operate at high utilisation rates. However, the factors which influence system efficiency over a project’s lifetime are not always clearly represented. Without due care, this can lead to unfair comparisons between technologies, unrealistic expectations of future costs, or underestimation of required project capacities. To address this issue, this article provides a primer on the topic of electrolyser efficiencies at the system level and outlines some of the potential avenues for improvement.

Hydrogen derived from renewable energy sources such as solar and wind is pivotal to decarbonization. As the hydrogen sector rapidly evolves, adaptable security measures against cyber threats are a necessity. Ensuring the highest level of protection against risks is paramount for this sector. What are the threats, and how can operators protect themselves?