Please use this identifier to cite or link to this item:
Title: Comparative study on sulphur reduction from heavy petroleum - Solvent extraction and microwave irradiation approach
Authors: Mohammed, Dyadya Mohammed
Isah, Abubakar Garba
Musa, Umar
Shehu, Ahmed
Abdullahi, Yababa Nma
Keywords: Heavy petroleum; Microwave irradiation; Solvent extraction; Sulphur compounds; Sulphur reduction
Issue Date: 2012
Publisher: International Journal of Energy and Environment
Abstract: Sulphur- containing compounds in heavy crude oils are undesirable in refining process as they affect the quality of the final product, cause catalyst poisoning and deactivation in catalytic converters as well as causing corrosion problems in oil pipelines, pumps and refining equipment aside environmental pollution from their combustion and high processing cost. Sulphur reduction has being studied using microwave irradiation set at 300W for 10 and 15minutes and oxidative- solvent extraction method using n- heptane and methanol by 1:1, 1:2 and 1:3 crude- solvent ratios after being oxidized with hydrogen peroxide, H2O2 oxidants. Percentage sulphur removal with n- heptane solvent by 1:1 and 1:2 are 81.73 and 85.47%; but extraction using methanol by different observed ratios gave less sulphur reduction. Indeed when microwave irradiated at 300W for 10 and 15minutes, 53.68 and 78.45% reduction were achieved. This indicates that microwave irradiation had caused oxidation by air in the oven cavity and results to formation of alkyl radicals and sulphoxide from sulphur compound in the petroleum. The prevailing sulphur found in the crude going by FT-IR results is sulphides which oxidized to sulphoxide or sulphones. It is clear that sulphur extraction with heptane is more efficient than microwave irradiation but economically due to demands for solvent and its industrial usage microwave irradiation can serve as alternative substitute for sulphur reduction in petroleum. Sulphur reduction by microwave radiation should be up- scaled from laboratory to a pilot plant without involving extraction column in the refining.
ISSN: 2076-2895
Appears in Collections:Chemical Engineering

Files in This Item:
File Description SizeFormat 
IJEE_10_v3n6.pdf481.41 kBAdobe PDFView/Open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.