Removal of Basic Nitrogen Compounds from Fuel Oil with [Hnmp]H2PO4 Ionic Liquid

• Main Authors: Z. Zhou, W. Li, J. Liu
• Format: Article
• Language: English
• Published: Croatian Society of Chemical Engineers 2017-04-01
• Series: Chemical and Biochemical Engineering Quarterly
• Subjects: [Hnmp]H2PO4 ionic liquid; shale diesel oil; denitrogenation; basic nitrogen
• Online Access: http://silverstripe.fkit.hr/cabeq/assets/Uploads/06-1-17.pdf

Ionic liquid (IL) N-methyl pyrrolidone dihydrogen phosphate ([Hnmp]H2PO4) was synthesized and its structure was characterized with FT-IR spectroscopy and 1H NMR. The denitrogenation performance of the ionic liquid was investigated using Fushun shale diesel oil that included 0.52 w% basic nitrogen as feedstock. Experiment results showed that under the operating conditions with temperature of 30 °C, 1:7 (w/w) IL: oil, reaction time of 20 min, and settling time of 2 h, the ionic liquid exhibited good denitrogenation performance achieving 86.27 % basic N-extraction efficiency and the yield of refined diesel oil can reach more than 90 %. In addition, the basic N-removal efficiency can still reach 54 % during four recycles of the ionic liquid.