Effect of Water Activity on Transesterification Kinetic Parameters of Coconut Oil with Ethanol

Description

– Effect of Water Activity on Transesterification Kinetic Parameters of Coconut Oil with Ethanol –

Download Effect of Water Activity on Transesterification Kinetic Parameters of Coconut Oil with Ethanol. Biochemistry students who are writing their projects can get this material to aid their research work.

Abstract

This work is focused on determining quantitatively how water, even in its smallest amount, affects transesterification kinetic parameters of coconut oil with ethanol;

with the view of assessing whether it is preferable to use anhydrous ethanol with high price or ethanol containing a certain amount of water in biodiesel production process. Physicochemical properties of the coconut oil were also determined.

The coconut oil produced was yellow and had the following values for viscosity, 21.24 ± 0.22mm 2 /s, relative density, 0.92 ± 0.001, flash point, 1900 C, cloud point, +27, pour point, +25, refractive index, 1.45 ± 0.001 and moisture content, 0.1%.

The average acid, iodine, peroxide and saponification values of the coconut oil were 0.523 ± 0.03 mgKOHg-1, 9.33 ± 0.04 mgIodineg-1, 0.00 meq/1000g and 270.26 ± 0.05 mgKOHg-1 respectively.

Introduction

As energy demands extremely increase while the energy sources are limited, a number of current studies focus on development of alternative fuels (Jha et al, 2007). One of such alternative fuels for combustion in compression-ignition (diesel) engines is the biodiesel.

Biodiesel is defined as a fuel composed of mono-alkyl esters of long-chain fatty acids derived from renewable lipid feedstock such as vegetable oils or animal fats, for use in compression ignition (diesel) engines (National Biodiesel Board, 1996).

Furthermore, biodiesel is oxygenated, sulfur-less, non-toxic and biodegradable biofuel suggestively because their lipid sources possess these qualities. It is natural and renewable; producing less pollution than petro diesel (Wassell and Dittmer, 2006).

Biodiesel came to be established as an alternative fuel after it was discovered that vegetable oils originally used in the diesel engine were problematic (with poor fuel atomization, incomplete combustion, carbon deposition on the injector and piston etc) (Ramadhas et al., 2005).

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