Hydrogen peroxide is a monopropellant for the rockets While

Hydrogen peroxide is a monopropellant for the rockets. While the disassociation of hydrogen peroxide happens very slowly under the standard conditions, in the presence of catalyst, it can vigorously breakdown to hot water vapour and oxygen gas. Typically, hydrogen peroxide is available mixed win water. The disassociation reaction can be written as: 2H_2C_2(l) + nH_2O(l) rightarrow (n + 2) H_2O (g) + O_2 (g) Where n is the number of moles of water mixed with the monopropellant. Discuss the advantages of a monopropellant rocket-under what circumstances monopropellant rockets outperform oln What are their disadvantages of a monopropellant rockets? Name another example of a monopropellant? Support your answers with equations from the book if necessary [5 + 5 + 5].

Solution

A monopropellant is a chemical propulsion fuel which does not require a separate oxidizer. A rocket engine which is based on amonopropellant requires only one fuel line instead of a fuel and an oxidizer line. The \"mono\" in monopropellant means singular--a fuel that can function alone.

Monopropellant rockets are simple propulsion systems that rely on chemicals which, when energized, decompose Decomposition creates both the fuel and an oxidizer (which allows the fuel to burn), which then react with each other Because they only use a single propellant, monopropellant rockets are quite simple and reliable, but not very efficient Mainly used to make small adjustments such as attitude control – Typical Specific Impulse: 100-300 sec – Typical Thrust: 0.1-100 N Monopropellant hydrazine (N2 H 4 ) thrusters that were used for trajectory correction maneuvers (TCMs) during interplanetary cruise, thrust vector control (TVC) during VOI, orbit trim maneuvers during the mapping mission, and attitude control when the action wheels are being desaturated. The rocket motors are clustered in modules located on the end of outrigger booms in order to increase their moment arm and thus decrease attitude control propellantrequirements. Twelve 0.9-N (Newton) and four 22-N rocket motors are used for attitude control, with thrust being provided by eight 445-N rocket motors or by the 0.9-N motors for small TCMs.

Advantages of monopropellent rockets

1)Simplicity

2)Relatively high specific impulse

3)Quick response

4)Easy to control

Dis advantages of monopropellent rockets

Chemical can be very dangerous to manufacture, transport and store

Example of monopropellent is hydrazine