Hydrous pyrolysis of organic sulfur compounds: Species and distribution of secondary derivatives

► Species and distributions of secondary derivatives generated from hydrous pyrolysis of eight organic sulfur compounds investigated. ► The secondary thiols, sulfides, disulfides and sulfonyls were largely formed from the alkyl thiols and sulfides. ► Disulfurization, sulfidization and oxidation are the most significant mechanism(s) for the transformation of the initial model compounds. ► Thiophenes, benzothiophenes and dibenzothiophenes were not genetically correlated and are not precursors for each other.