Biodiesel production using waste frying oil

Journal Article · Sat Jan 15 00:00:00 EST 2011 · Waste Management

DOI:https://doi.org/10.1016/j.wasman.2010.09.003· OSTI ID:21541762

Charpe, Trupti W ^[1]

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1. Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai 400 019 (India)

Research highlights: {yields} Waste sunflower frying oil is successfully converted to biodiesel using lipase as catalyst. {yields} Various process parameters that affects the conversion of transesterification reaction such as temperature, enzyme concentration, methanol: oil ratio and solvent are optimized. {yields} Inhibitory effect of methanol on lipase is reduced by adding methanol in three stages. {yields} Polar solvents like n-hexane and n-heptane increases the conversion of tranesterification reaction. - Abstract: Waste sunflower frying oil is used in biodiesel production by transesterification using an enzyme as a catalyst in a batch reactor. Various microbial lipases have been used in transesterification reaction to select an optimum lipase. The effects of various parameters such as temperature, methanol:oil ratio, enzyme concentration and solvent on the conversion of methyl ester have been studied. The Pseudomonas fluorescens enzyme yielded the highest conversion. Using the P. fluorescens enzyme, the optimum conditions included a temperature of 45 deg. C, an enzyme concentration of 5% and a methanol:oil molar ratio 3:1. To avoid an inhibitory effect, the addition of methanol was performed in three stages. The conversion obtained after 24 h of reaction increased from 55.8% to 63.84% because of the stage-wise addition of methanol. The addition of a non-polar solvent result in a higher conversion compared to polar solvents. Transesterification of waste sunflower frying oil under the optimum conditions and single-stage methanol addition was compared to the refined sunflower oil.

• OSTI ID: 21541762
• Journal Information: Waste Management, Vol. 31, Issue 1; Other Information: DOI: 10.1016/j.wasman.2010.09.003; PII: S0956-053X(10)00450-2; Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0956-053X
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
09 BIOMASS FUELS
BIOFUELS
BIOLOGICAL WASTES
CATALYSTS
CONVERSION
DIESEL FUELS
ESTERS
HEPTANE
HEXANE
LIPASES
METHANOL
PSEUDOMONAS
SOLVENTS
SUNFLOWER OIL
ALCOHOLS
ALKANES
ALTERNATIVE FUELS
BACTERIA
BIOLOGICAL MATERIALS
CARBOXYLESTERASES
DISTILLATES
ENERGY SOURCES
ENZYMES
ESTERASES
FOSSIL FUELS
FUELS
GAS OILS
HYDROCARBONS
HYDROLASES
HYDROXY COMPOUNDS
LIQUID FUELS
MATERIALS
MICROORGANISMS
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM
PETROLEUM DISTILLATES
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
PROTEINS
VEGETABLE OILS
WASTES