FT-ICR MS Analysis of Nitrogen-Containing Compounds in the Products of Liaohe Atmospheric Residue Hydrocracking

In this paper, the distribution of nitrogen (N)-containing compounds of slurry-bed hydrocracking products are investigated. Raw materials of the products were Liaohe atmospheric residue (LHAR), while the hydrocracking reaction was maintained at 430 °C with initial pressure of 8.0 MP for 1 h. The distillation fractions, including 180–350 °C (diesel fuel), 350–400 °C (VGO), 400–450 °C (VGO), and >450 °C (cracked residue), were analyzed by electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry (ESI FT-ICR MS). It turned out that the main type of N-containing compounds in the products was N 1 compounds. The main N-containing compounds in diesel oil were N 1 compounds with C 17 –C 23, while in VGO the main N-containing compounds were N 1 compounds with C 20 –C 26 and, at the same time, N 2 and N 2 S 1 compounds also appeared. In addition, the main compounds in cracked residue were N 1 compounds with C 24 –C 28, but the relative abundance of N 2 compounds, which mainly centralized in cracked residue, increased. Other types of nitrogen compounds were few in products.