Hydrodenitrogenation of Basic and Non-basic Nitrogen Compounds in Shale Oil over NiW/Al_2O_3 Catalyst

摘要

The hydrodenitrogenation (HDN) of Longkou shale oil were carried out in microscale trick-bed reactor over a commercial NiW/Al_2O_3 catalyst with high HDN activity. The effects of temperature, pressure, liquid hourly space velocity (LHSV) and hydrogen/oil ratio on the conversions of total, basic and non-basic nitrogen compounds were investigated at various conditions (340-420°C, 0.2-2h~(-1), 4-9MPa and 400-1000 L/L). The results show that basic nitrogen compounds have higher HDN reactivity than non-basic nitrogen. The distributions and species of nitrogen compounds in Longkou shale oil were also investigated. About 33% of total nitrogen is present in big molecules with high boiling point. The nitrogen compounds in Longkou shale oil are mainly composed by seven kinds of components (nitriles, anilines, pyridines, quinolines, acridines, carbazoles and indoles).