The quest for clean energy solutions is driving innovation across the energy sector, and green hydrogen has emerged as a key player in this transition. As we strive for a net-zero emissions future, green hydrogen offers a versatile and sustainable energy carrier.
But what exactly is green hydrogen? It is hydrogen produced using renewable energy sources, such as solar and wind, through a process called electrolysis. This method distinguishes it from “grey” or “blue” hydrogen, which relies on fossil fuels.
The benefits of green hydrogen are clear: it is a clean-burning fuel that produces only water vapour as a byproduct, making it a powerful tool in decarbonising various sectors.
Producing Green Hydrogen
The production of green hydrogen primarily relies on electrolysis, a process that uses renewable energy to split water into hydrogen and oxygen. While promising, scaling up sustainable hydrogen production presents several challenges.
Firstly, renewable energy costs must decrease to make green hydrogen economically competitive. Secondly, the efficiency of electrolysers needs to improve to minimise energy losses.
However, technological advancements are offering solutions. Innovations in electrolyser design, catalyst materials, and system integration are driving down costs and increasing efficiency. These developments are crucial for making green hydrogen a viable and widespread clean energy solution.
Storing and Transporting Green Hydrogen
Unlike natural gas, hydrogen has a low volumetric energy density, meaning it requires more space to store the same amount of energy. Various storage methods are being explored, including compressed gas, liquid hydrogen, and chemical storage.
Each method has its own set of advantages and disadvantages. Compressed gas storage is relatively mature but requires high pressures. Liquid hydrogen storage offers higher energy density but requires cryogenic temperatures. Chemical storage, such as using ammonia as a carrier, is promising but requires further research and development.
Developing safe and efficient transportation infrastructure is also crucial for the widespread adoption of green hydrogen. Pipelines, tankers, and other transportation methods need to be adapted or developed to handle the unique properties of hydrogen.
Applications of Green Hydrogen
With the logistics of storage and transportation being addressed, the diverse applications of green hydrogen have become increasingly viable. For instance, green hydrogen can power fuel-cell vehicles, offering a zero-emission alternative to traditional combustion engines.
In factories, it can be used as a feedstock for producing green steel, chemicals, and other materials. Green hydrogen can also play a crucial role in power generation, providing grid balancing services and storing excess renewable energy.
Notably, green hydrogen holds significant potential for decarbonising hard-to-abate sectors, such as aviation, shipping, and heavy industry, where electrification is challenging.
Green Hydrogen: A Key Pillar of the Energy Transition
Green hydrogen is poised to become a cornerstone of the energy transition, playing a vital role in decarbonising various sectors and achieving a sustainable energy future. Its versatility and clean-burning properties make it ideal for replacing fossil fuels in hard-to-abate industries and transportation.
That said, continued research, development, and investment in green hydrogen technologies, including energy monitoring infrastructure, are essential for overcoming the current challenges and realising their full potential.
As a company that facilitates certified renewable energy trade, REDEX recognises the significance of green hydrogen in the energy transition. We are committed to supporting the growth of the green hydrogen economy by connecting renewable energy generators with those seeking to offset their environmental impact and contribute to a sustainable energy future.
