Why Green Hydrogen Is the Holy Grail of Renewable Energy
For the last 100 years or so, fossil fuels have made up about 80% of our energy supply. And today, they are widely seen as the main contributors to climate change.
They are responsible for more than 75% of U.S. greenhouse gas (GHG) emissions. And in 2018, burning fossil fuels spewed 5 billion metric tons of carbon dioxide into the atmosphere.
In order to reverse the harmful effects of climate change, the world is rushing to replace fossil fuels with non-GHG-emitting ones. But it’s a herculean task.
Renewable energy sources – like wind, solar, hydro and geothermal – are part of the solution. And so is electrifying our transportation sector.
But there is another pillar of technology needed to get the world to a net-carbon-neutral state. And it presents some fantastic investment opportunities.
I’m talking about green hydrogen.
Holy Grail of Renewable Energy
Hydrogen is the lightest element in the universe. It’s also a versatile carrier of energy with exceptional energy density.
Today, the world produces about 70 million metric tons of hydrogen annually. It’s used in the refining sector, and it’s used to make glass, solar panels, petrochemicals and fertilizer.
The color attached to hydrogen’s name refers to how it’s made – not the actual color of the gas.
Most of today’s hydrogen comes as a byproduct of fossil fuel refining. So about 71% of today’s hydrogen is “gray.” It’s made via steam methane reformation as part of the refining process.
The majority of the remaining hydrogen is “brown.” It comes from coal gasification.
We have used these methods for decades to make hydrogen. But they throw off tons of GHGs as byproducts.
Changing today’s hydrogen production to add carbon capture and storage creates “blue” hydrogen. But this hasn’t been commercialized and scaled to needed levels.
That brings us to “green” hydrogen. Green hydrogen is the holy grail that climate watchdogs have been hoping for.
The technology behind green hydrogen is totally different from other methods used to produce the gas. This hydrogen is produced by electrolysis.
Renewable energy-powered electrolyzers separate water into oxygen and hydrogen. As renewable energy continues to roll out in the coming decades, green hydrogen production will rise.
Whenever surplus renewable energy is available, it can be used to make green hydrogen, which can then be stored until needed or sold.
Storing green hydrogen means we can use it at a later time. It gives utility operators a balancing tool for intermittent renewable energy sources, like wind and solar.
In addition to hydrogen’s uses mentioned above, green hydrogen opens up a wide range of applications too.
Steelmaking and cementmaking are two industries that are very difficult to decarbonize. Each has a different production process. But both share one big challenge: needing large amounts of continuous, high-temperature heat.
And we can’t just stop making either material. Cement and steel are essential building blocks for today’s modern construction. But each of them is responsible for about 7% of energy-related GHGs.
That’s because their heat sources are fueled by natural gas. Switching to green hydrogen is a key part of decarbonizing them.
Integrating green hydrogen into the existing natural gas pipeline network will require some changes. Hydrogen has a much lower volumetric density than natural gas.
Making green hydrogen viable means reducing the cost to make it. Volume production is always key to reducing the cost of anything, and green hydrogen is no exception.
Experts believe green hydrogen costs could drop by one-third by 2030. The automated production of electrolyzers will help.
Technology Marches On
Today, the green hydrogen sector is tiny. But many countries around the world are looking to green hydrogen as a major tool for decarbonizing.
Hydrogen gives off no emissions when burned. Fuel cell electric vehicles could dramatically exceed the range of today’s EVs.
Germany and Italy have plans underway for hydrogen-powered trains. And ship manufacturers are racing to produce net-zero vessels using green hydrogen.
Even some of the major oil companies are exploring the green hydrogen space. It’s not a question of whether green hydrogen will be widely adopted, but when.
Today, green hydrogen is where EVs were 10 years ago. Its cost is currently too high.
But technology marches on, and it will do so in the green hydrogen sector. And savvy investors are already positioning their energy portfolios to include green hydrogen.
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