Production Technology for Low -Sulfur High-Viscosity Marine Fuels

Abstract

A new production technology for low-sulfur high-viscosity marine fuel via indirect hydroprocessing of atmospheric residue using hydrotreating of vacuum gasoil and heavy coking gasoil mixtures obtained from processing atmospheric residue over NiW/Al₂0₃ catalyst synthesized using a Keggin heteropolyacid as a precursor and citric acid as a chelating agent is presented. Hydrotreating of mixed feedstock with 10-20 wt.% of the second component at 360°C, 5 MPa H₂ pressure, 1.0 h-1 liquid hourly space velocity (LHSV), and 800 Nm³/m³ H₂/feedstock ratio produced an RMB 30 marine fuel component with <0.1 wt.% S.