Inhibiting HDS and HYD Reactions with Quinoline on Co(Ni)-PMo(W)/Al_2O_3 Catalysts: Effect of Active Phase Composition on Stability in the Hydrotreatment of a Model Petroleum Raw Material

摘要

Со(Ni)-PMo(W)/Al_2O_3 catalysts are prepared using Keggin heteropoly acids H_3PMo(W)_(12)O_(40) and cobalt (nickel) citrate. The physicochemical properties of the catalysts are studied via low-temperature nitrogen adsorption, X-ray photoelectron spectroscopy, and high-resolution transmission electron microscopy. Their catalytic properties are determined in the hydrotreatment of a model raw material containing dibenzothiophene, naphthalene, and different amounts of quinoline (up to 1000 ppm of nitrogen), and in the hydrotreatment of a straight-run diesel fraction and vacuum gas oil. The composition of Со(Ni)- PMo(W)/Al_2O_3 catalysts plays an important role in the hydrotreatment of a complex hydrocarbon raw material. Ni-PW/Al_2O_3 catalyst is more resistant to organonitrogen inhibitors than Ni(Co)-PMo/Al_2O_3 samples with more reactive active sites. Ni-PW/Al_2O_3 catalyst provides the greatest depth of conversion for sulfur- and nitrogen- containing compounds and polycyclic aromatic hydrocarbons in the hydrotreatment of vacuum gas oil.