Effect of catalysts acidity on residues hydrotreatment

▶ Catalysts acidity enhances residues hydrotreatment performances. ▶ HDS, HDN, HDV, HDNi, and asphaltenes conversion are enhanced. ▶ HDT catalysts performances improvement is attributed to strong Brønsted acid sites. ▶ No supplemental coke is obtained if a strong hydrogenating activity is present.