Ultrasound and mixing assisted oxidative desulfurization of model sulfur compounds using commercial ferrate (VI)

Date of Publication

3-2013

Document Type

Master's Thesis

Degree Name

Bachelor of Science in Chemical Engineering (Honors) - Ladderized

Subject Categories

Chemical Engineering

College

Gokongwei College of Engineering

Department/Unit

Chemical Engineering

Thesis Adviser

Susan A. Roces
Nathaniel P. Dugos
Meng-Wei Wan

Defense Panel Chair

Kathleen B. Aviso

Defense Panel Member

Raymond Girard R. Tan
Michael Angelo B. Promentilla

Abstract/Summary

Fossil fuel derived oil must be treated through a desulfurization process in order for it to comply with environmental regulations. In this study, the use of an ultrasound probe and a high shear mixer is applied to oxidative desulfurization together with a commercial ferrate and phase transfer agent to test the model sulfur compounds benzothiophene and dibenzothiophene. Under the use of an ultrasound probe; the effect of phase transfer agent (100 – 300 mg), ferrate concentration (100 – 300 ppm), ultrasonication time (10 – 30 min), and organic to aqueous phase ratio (10:30 – 30:10) on sulfur reduction was studied. Whereas using a high shear mixer studied the effect of reaction temperature (50 – 70 ˚C), agitation speed (7,600 – 14,000 rpm), and mixing time (10 – 30 min) on sulfur reduction. Box-Behnken design under response surface methodology is used in order to optimize the operating conditions in desulfurization as well as to determine the level of significance of each single and interacting factor using the analysis of variance. This was then applied to raw diesel oil to show its applicability on a small scale. Results showed that the optimized condition in benzothiophene and dibenzothiophene under ultrasound-assisted oxidative desulfurization applied to diesel oil showed 93.26% and 98.47% sulfur removal respectively, while the mixing-assisted oxidative desulfurization showed 58.03% and 93.15% sulfur removal, respectively.

Abstract Format

html

Language

English

Accession Number

CDTG005323

Shelf Location

Archives, The Learning Commons, 12F Henry Sy, Sr. Hall

Keywords

Desulfurization; Ferrites (Magnetic materials); Sulfur compounds

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Embargo Period

6-25-2023

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