Mechano-catalytic conversion
of plastic (waste) to C1–10 hydrocarbons. (A) Milling
container, surface activation strategy,
and SEM images of grinding spheres. (B) Propene flow during milling
of 2 g model PP with sulfated (SZ-800), tungstated (WZ-red), and untreated
(ZrO2) spheres at 30 Hz, compared to milling with untreated
spheres and 0.1 g SZ and 0.2 g WZ powder catalysts. The shaking was
turned off/on at the indicated points. (C) Cumulative yields during
milling of 20 mg model PP for 1 h at 35 Hz with sulfated (SZ-800),
tungstated (WZ-red), and untreated (ZrO2) spheres. (D)
Cumulative yields during milling of HMW PP (2 g, 30 Hz), waste PP
(2 g, 30 Hz), PE (2 g, 35 Hz) and industrial waste (1 g, 30 Hz) for
1 h with sulfated (SZ-800) and untreated (ZrO2) spheres.