Quinoline had stronger inhibiting effects on the HDS of the straight run gas oil than that of indole.
HDS of simple structure sulfur compounds have not or slightly been inhibited by the increment of N/S ratios.
Nitrogen inhibition effects on the HDS of thiophene series sulfur compounds decreased as: 4,6-DMDBT > 4-MDBT > C1DBT > DBT > C2-C3DBT.