when they decommission the ISS why not push it out into space rather than getting to crash into the ocean

Question

So I’ve just heard they’ve set a year of 2032 to decommission the International Space Station. Since if they just left it, its orbit would eventually decay and it would crash. Rather than have a million tons of metal crash somewhere random, they’ll control the reentry and crash it into the spacecraft graveyard in the pacific.

But why not push it out of orbit into space? Given that they’ll not be able to retrieve the station in the pacific for research, why not send it out into space where you don’t need to do calculations to get it to the right place.

In: Planetary Science

Answer 1

The ISS orbits at around 7.5km/s. The earths escape velocity is 11.2 km/s. We would need to increase the ISS speed by about 50% to launch it into space, which would take massive engines burning a massive amount of propellant