Extractive Desulfurization Using Piperidinium Based Ionic Liquids with Lewis Acids

Abstract

This work includes the preparation of ionic liquid 1,4-dimethylpiperidinium iodide [MMPip]I andits salts with ferric chloride as Lewis acid in different molar proportions [MMPip]I/nFeCl 3 (n=1,2,3). Theprepared compounds were diagnosed by spectroscopic and physical methods such as 1H-NMR, FT-IR,elemental analysis (CHN) and other techniques. The thermal stability of these compounds was studied touse in the extractive desulfurization process (EDS). The efficiency of these compounds in removing sulfurcompounds from the petroleum model was examined using dibenzothiophene (DBT) with a concentrationof 1000 ppm dissolved in the solvent of normal hexane. The results showed that the compounds used hadan acceptable efficiency of up to 30% despite using medium amounts of the extracted agent relative to theoil model; these compounds have a promising future in extractive sulfur removal processes.