The sulfur-containing compounds in residues have negative effects on residue processing.The sulfur compounds in residues are mainly composed of thioethers and thiophenes.

• 渣油中硫化物的存在对石油加工和石油生产带来很多不利条件,渣油中的主要硫化物为硫醚硫和噻吩硫,总硫与硫醚硫的差值即为噻吩硫。