  The scarcity of fossil fuels as carbon resources has motivated the
steelmaking industry to search for new carbon sources such as end-of-life
polymeric products. Using $\textit{ab initio}$ molecular dynamics simulation,
we demonstrate that 41% of polycarbonate's carbon content is readily dissolved
in molten iron's interface at $T$ = 1823 K which is comparable to graphite with
$\sim$ 58% carbon content dissolution. More importantly, we demonstrate that
polycarbonate's hydrogen content does not dissolve in molten iron but rather
escape in gaseous form. Therefore, waste polycarbonate constitutes a feasible
carbon source for steelmaking.
