Comments by "kazedcat" (@kazedcat) on "Business Insider" channel.

@oriontigley5089 It is pretty simple hydrogen is a scam. Hydrogen is not free you need to create it either by using electricity or burning natural gas. Creating hydrogen from electricity consumes a lot of energy. It is so much that every kilowatt that is use to move a vehicle you loss 4 kilowatts in the process. Burning natural gas is also nonsense because you can drive more miles per kg of natural gas using it directly in a Compress Natural Gas Vehicle compare to converting it to hydrogen and driving a hydrogen car. Also burning natural gas to create hydrogen does not actually remove emission. Now if you take account the problems of storing hydrogen that can leak through solid metal. Also hydrogen is very flammable and it's flame is invisible. There is actually no reason to use hydrogen instead of using natural gas directly or charging an electric car directly. Also hydrogen fuel cell is very low power that you actually need a large battery in a hydrogen car to supply the needed power. So hydrogen car is mostly battery electric and hydrogen is there to just extend range. A more expensive way to extend range
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@Future President Hydrogen is the most difficult gas to store. They can leaked through solid metal and weaken the metal in the process. If you wan't to store fuel from renewable then doing direct methane synthesis is a lot more practical. But fuel is not the only way to store energy. Pump storage and flow batteries are examples of more efficient energy storage solution. They are both using liquid to store energy that gives you long term storage without using pressurised container.
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No it will not. Unless you are going to fill the passenger cabin with hydrogen. If using hydrogen on cars is problematic you double that when you use it in planes. The amount of thrust you can extract from hydrogen per unit volume is very low. The reason is that hydrogen is very light so the amount of omf it gives is also lower.
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@frank4425 Hydrogen aircraft is only viable if you fill the passenger cabin with pressurized hydrogen. The energy density of hydrogen is abysmal specially if use it to fuel jet turbines. You cannot use the FCEV route since that will give you a plane so heavy it cannot fly. But using it as fuel for jet turbine is also problematic. first you need large pipes to have adequate mass flow. Then you need larger turbine blades since hydrogen is so light you need larger blades to get the needed power. Then you need to burn large amount of hydrogen to reach the needed thrust. Although burning hydrogen is very efficient in terms of energy release it provides lower thrust. And thrust is what is needed to make airplanes fly.
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@frodobaggins2852 You can extract lithium from the ocean. Nobody does it now because it is cheaper to mine lithium salts. But the ocean contain lots of lithium. There is no way that we will run out of lithium even if we convert our entire transport system into electric using lithium battery.
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Johan Liebert You could burn waste directly and create electricity. That is going to extract more energy than separating hydrogen from hydrocarbon chain then oxidizing it later. If you want fuel from waste you can do methane synthesis from waste. Basically attaching one carbon atom on every 4 hydrogen atoms make it easier to store and transport. What ever breakthrough technology you develop to produce hydrogen you can just do the attached one carbon atom at the end of the process to get a better fuel.
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