eprintid: 15020 rev_number: 2 eprint_status: archive userid: 1 dir: disk0/00/01/50/20 datestamp: 2023-11-10 03:29:37 lastmod: 2023-11-10 03:29:37 status_changed: 2023-11-10 01:58:26 type: article metadata_visibility: show creators_name: Khaidzir, S. creators_name: Masri, A.N. creators_name: Ruslan, M.S.H. creators_name: Abdul Mutalib, M.I. title: Ultrasonic-Assisted Technique as a Novel Method for Removal of Naphthenic Acid from Model Oil Using Piperidinium-Based Ionic Liquids ispublished: pub note: cited By 2 abstract: In this study, piperidinium-based ionic liquids (IL) containing trifluoromethanesulfonate, phenolate, and dicyanamide anions were synthesized. Using the ILs, extraction of naphthenic acid from highly acidic oil with a total acid number (TAN) of 1.44 was studied. Two agitation techniques have been implemented for the extraction process, which were mechanical stirring and ultrasonic-assisted irradiation. 1-Butyl-1-methylpiperidinium phenolate BMPiPhe showed the best potential in extracting naphthenic acid from oil, with complete removal of naphthenic acid with IL-to-oil ratios of 0.010 and 0.0025 for the mechanical stirring method and the ultrasonic-assisted method, respectively. Ultrasonic-assisted extraction process shows very good potential in enhancing the extraction efficiency of naphthenic acid. Optimization and study on the effects of ultrasonic parameters, namely, IL-to-oil ratio, ultrasonic amplitude, and time, were studied through response surface methodology (RSM). Using BMPiPhe, the optimum conditions obtained are IL-to-oil ratio of 0.03, 53.91% of amplitude, and 4.29 min of extraction time. Under these optimum conditions, 100% removal of naphthenic acid was achieved. © 2021 The Authors. Published by American Chemical Society. date: 2021 publisher: American Chemical Society official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85104943207&doi=10.1021%2facsomega.1c00189&partnerID=40&md5=b03a7a3e858b3a3c15e8f77e7d2deaf9 id_number: 10.1021/acsomega.1c00189 full_text_status: none publication: ACS Omega volume: 6 number: 14 pagerange: 9629-9637 refereed: TRUE issn: 24701343 citation: Khaidzir, S. and Masri, A.N. and Ruslan, M.S.H. and Abdul Mutalib, M.I. (2021) Ultrasonic-Assisted Technique as a Novel Method for Removal of Naphthenic Acid from Model Oil Using Piperidinium-Based Ionic Liquids. ACS Omega, 6 (14). pp. 9629-9637. ISSN 24701343