In the context of Green Propulsion, which of the following statement(s) is/are true regarding the advantage(s) of using Hydroxylammonium Nitrate (HAN)-based monopropellants over traditional Hydrazine?
- HAN-based fuels have a higher density and higher specific impulse, offering better performance with lower toxicity.
- HAN-based fuels do not require an ignition source as they react spontaneously with the vacuum of space.
Choose the correct option from the following.
Correct answer: A
Explanation
HAN-based green propellants offer higher density and higher specific impulse than hydrazine with much lower toxicity, so statement 1 is correct. Statement 2 is wrong because HAN monopropellants still need a catalyst and a high chamber temperature to decompose and ignite; they don't react spontaneously with the vacuum of space.