Question

why is hydrogen not used as a fuel through it has the highest calorific value​

Answer 1

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When hydrogen comes in contact withair, it reacts explosively. Hydrogen needs to be compressed at higher pressures. ... As hydrogen is combustible and has a storage problem, transportation is also a problem for hydrogen gas. Therefore, though hydrogen gas has the highest calorific value, it cannot be used as a fuel.

Answer 2

When hydrogen comes in contact with air, it reacts explosively. Hydrogen needs to be compressed at higher pressures. ... As hydrogen is combustible and has a storage problem, transportation is also a problem for hydrogen gas. Therefore, though hydrogen gas has the highest calorific value, it cannot be used as a fuel.