How is green hydrogen produced and why is it better than regular hydrogen

It's not exactly that it's "better," but rather that it's produced in a much less polluting way. Green hydrogen is obtained by separating H2O through electrolysis using renewable energy (solar, wind), while conventional hydrogen comes from natural gas reforming, which emits a ton of CO2. The key difference is that green hydrogen doesn't generate emissions during its production, so if you use it in fuel cells or in heavy industry, you basically don't pollute at all! The problem right now is that it's expensive and requires a lot of clean electricity available, but there are increasingly more projects underway to make it viable.

Electrolysis using renewable energy is the process, like they already said, but what nobody mentions is that the actual cost drops when you use renewable energy surpluses that would otherwise be wasted - some countries are already selling green hydrogen cheaper than gray hydrogen during certain hours. "Normal" hydrogen typically comes from natural gas (steam reforming), which releases a ton of CO2 in the process, so green isn't just cleaner but it's the only option that makes sense long-term if we want to stop burning fossil fuels.

Basically it all comes down to the energy source you use to do the electrolysis 💧 You run an electric current through water and boom, it separates into hydrogen and oxygen. If that current comes from solar panels or wind turbines, then you've got "green" hydrogen because you're not burning fossil fuels in the process. The normal hydrogen that exists now (the grey kind) is mostly produced from natural gas, so it's generating emissions right from the start.

What's important to know though is that electrolysis efficiency isn't perfect 😅 You lose energy in the process, so you need way more renewable energy than you actually end up getting as hydrogen. If your renewable source is limited or expensive, things get tricky. That's why it makes a lot of sense what they mention about taking advantage of the excess energy that gets generated during peak hours (when there's lots of sun or wind) but nobody's using. That potential waste gets turned into stored hydrogen, which is honestly pretty smart.

The pitfall nobody talks about is that the infrastructure to transport and store green hydrogen is still expensive and complicated. It's not the same thing to produce it as it is to distribute it safely, so there's still a long way to go before it's really competitive at massive scale 🌱

The thing everyone misses is that electrolysis consumes a massive amount of energy - we're talking about roughly 50-60 kWh per kilo of hydrogen or so, depending on the technology. That means even if you use renewables, you need them to be really abundant and cheap, not just "available". In many countries, the reality is that they still have a mixed energy grid and the cost ends up being prohibitive compared to grey hydrogen, so it's not as simple as plugging into a solar panel. The most important thing is to actually verify where that electricity is coming from before falling for greenwashing - many companies sell "green" but use grid power that mostly comes from coal or gas.