关键词: 渣油, 加氢, 残炭, 载体, 酸性

Abstract: The effects of the fluorine modification on the physical and chemical properties of the catalysts and the molecular structure changes of the residues before and after the hydrotreating were investigated by using Arabian Light atmospheric residue (AR) with high sulfur and low nitrogen content and Changling Guanshu AR with low sulfur and high nitrogen content as raw materials. The results show that the addition amount of fluorine in the pore-volume impregnation method has slight effect on the pore structure of the support. With the increase of acid additive, the amount of Lewis acid on the alumina support decreasedwhile the amount of Bronsted acidon the catalyst increased. The acid additive weakened the interaction between the metal and the carrier and the change in the morphology of the active phase, which in turn leads to the relative content of high hydrogen deficiency (-32 and above) S1 thiophene sulfides in the oil after the hydrogenation of the Arabian Light AR increase, the desulfurization and carbon residue removal activity of the catalyst is reduced. Fluorine modification hasslight effect on the hydrodenitrogenation rate of high-sulfur and low-nitrogen Arabian Light AR, while it has a significant promotion effect on the increase of the hydrodenitrogenation rate of low-sulfur and high-nitrogen Changling Guanshu AR.

Key words: residue, hydrotreating, carbon residue, support, acidity