Ultrasonic extraction is a necessary pretreatment prior to catalytic hydroconversion (CHC).
FeNi–S/γ-Al2O3 obviously increased the yields of soluble portion in E1 and E3 from ERGBC.
CHC over FeNi–S/γ-Al2O3 markedly increased the yields of 1–2 ring(s) arenes.
The resulting H and the stabilizing effect of H2 could play crucial roles in releasing methylarenes.