| 초록 |
Heavy residual feedstocks contain significant amounts of heavy metal atoms such as vanadium and nickel. It is well known that during hydrodemetallization (HDM) processes heavy metals are progressively deposited on the catalyst in the form of sulfide. however, this assumption is not able to support in the case of the dispersed sulfide catalysts. Thus, the purpose of study is to investigate the effect of vanadium and nickel sulfides on the slurry phase hydroprocessing of vacuum residue. Hydroconversion of vacuum residue was performed in an autoclave with dispersed sulfide catalysts, which were produced in situ from the molybdenum, vanadium, or nickel oil soluble precursors. The reaction test was performed at 693K and 10.0MPa, for 1.5h, under stirring at a rpm of 1500. Characterizations of the catalysts were made using transmission electron microscopy (TEM), thermogravimetric analysis (TGA), and inductively coupled plasma optical emission spectrometer(ICP-OES). |
