Thermal Effusivity And Refractive Index Of Oil-Alcohol Mixtures

Thermal Effusivity And Refractive Index Of Oil-Alcohol Mixtures

The open photoacoustic cell technique has been used for thermal effusivity measurements on pure liquids and liquid mixtures. The thermal effusivity was determined from the captured photoacoustic signal amplitude as a function of modulated frequency. The chosen samples for liquids were ethanol, metha...

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Main Author: Mohamad Al-Asfoor, Firas Kamel
Format: Thesis
Language:English
English
Published: 2009
Subjects:
Oils and fats - Thermal diffusivity - Case studies
Online Access:http://psasir.upm.edu.my/id/eprint/5705/1/A_FS_2009_11.pdf
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spelling my-upm-ir.57052013-05-27T07:24:34Z Thermal Effusivity And Refractive Index Of Oil-Alcohol Mixtures 2009 Mohamad Al-Asfoor, Firas Kamel The open photoacoustic cell technique has been used for thermal effusivity measurements on pure liquids and liquid mixtures. The thermal effusivity was determined from the captured photoacoustic signal amplitude as a function of modulated frequency. The chosen samples for liquids were ethanol, methanol, glycerol, virgin olive oil, virgin coconut oil and distilled water. The thermal effusivity values which were obtained for these liquids were in the range from 0.0524 W s1/2 K-1 cm-2 to 0.1522 W s1/2 K-1 cm-2 with acceptable error about (± 0.041). For oil- alcohol mixtures, two kinds of alcohol (ethanol and methanol) were mixed separately with two types of virgin oils and eleventh different percentages for each oil- alcohol mixture sets were obtained. Thermal effusivity values and the density of virgin olive oil-ethanol mixtures decreased with the increasing of ethanol composition in the mixture. The thermal effusivity values for virgin oil- ethanol mixture varied from 0.0524 W s1/2 K-1 cm-2 to 0.0589 W s1/2 K-1 cm-2, and the density By using the minimum deviation method, the refractive index was determined for the samples. Distilled water was used to calibrate the experimental setup. The experiment was carried out at room temperature and a laser source with 632.8 nm wavelength was used. The refractive index of distilled water was 1.332 which is in good agreement with literature. Using the same laser source, the refractive indices of the mixture samples were measured. Virgin olive oil-ethanol mixtures has refractive index varied from 1.3597 to 1.4652. The refractive indices of virgin olive oil-methanol mixture varied from 1.3266 to 1.4564. The same method was used to measure the refractive index of virgin coconut oil-ethanol mixtures and it was found that these values varied from 1.3597 to 1.4524. The refractive index measurements were carried for virgin coconut oil-methanol mixtures and it was found that the refractive index values were varied from 1.3266 to 1.4524. In this study it was found that the refractive index for all the mixture samples decreased gradually while the alcohol percentage increased in the mixture. The FTIR measurements ranging from 600 cm-1 to 4000 cm-1 were carried out to determine functional groups of the mixtures using Fourier Transform Infrared. Generally the FTIR spectra for all mixtures shows that the five important peaks explaining the stretching absorption due to aldehyde (C= O) and esters (C-O), bending absorption (methylene (CH2) and methyl (CH3) groups) and double bond absorptions (C= O) are strong in pure oils and oil- alcohol mixtures. Oils and fats - Thermal diffusivity - Case studies 2009 Thesis http://psasir.upm.edu.my/id/eprint/5705/ http://psasir.upm.edu.my/id/eprint/5705/1/A_FS_2009_11.pdf application/pdf en public masters Universiti Putra Malaysia Oils and fats - Thermal diffusivity - Case studies Faculty: Science English
institution Universiti Putra Malaysia
collection PSAS Institutional Repository
language English
English
topic Oils and fats - Thermal diffusivity - Case studies
spellingShingle Oils and fats - Thermal diffusivity - Case studies


Mohamad Al-Asfoor, Firas Kamel
Thermal Effusivity And Refractive Index Of Oil-Alcohol Mixtures
description The open photoacoustic cell technique has been used for thermal effusivity measurements on pure liquids and liquid mixtures. The thermal effusivity was determined from the captured photoacoustic signal amplitude as a function of modulated frequency. The chosen samples for liquids were ethanol, methanol, glycerol, virgin olive oil, virgin coconut oil and distilled water. The thermal effusivity values which were obtained for these liquids were in the range from 0.0524 W s1/2 K-1 cm-2 to 0.1522 W s1/2 K-1 cm-2 with acceptable error about (± 0.041). For oil- alcohol mixtures, two kinds of alcohol (ethanol and methanol) were mixed separately with two types of virgin oils and eleventh different percentages for each oil- alcohol mixture sets were obtained. Thermal effusivity values and the density of virgin olive oil-ethanol mixtures decreased with the increasing of ethanol composition in the mixture. The thermal effusivity values for virgin oil- ethanol mixture varied from 0.0524 W s1/2 K-1 cm-2 to 0.0589 W s1/2 K-1 cm-2, and the density By using the minimum deviation method, the refractive index was determined for the samples. Distilled water was used to calibrate the experimental setup. The experiment was carried out at room temperature and a laser source with 632.8 nm wavelength was used. The refractive index of distilled water was 1.332 which is in good agreement with literature. Using the same laser source, the refractive indices of the mixture samples were measured. Virgin olive oil-ethanol mixtures has refractive index varied from 1.3597 to 1.4652. The refractive indices of virgin olive oil-methanol mixture varied from 1.3266 to 1.4564. The same method was used to measure the refractive index of virgin coconut oil-ethanol mixtures and it was found that these values varied from 1.3597 to 1.4524. The refractive index measurements were carried for virgin coconut oil-methanol mixtures and it was found that the refractive index values were varied from 1.3266 to 1.4524. In this study it was found that the refractive index for all the mixture samples decreased gradually while the alcohol percentage increased in the mixture. The FTIR measurements ranging from 600 cm-1 to 4000 cm-1 were carried out to determine functional groups of the mixtures using Fourier Transform Infrared. Generally the FTIR spectra for all mixtures shows that the five important peaks explaining the stretching absorption due to aldehyde (C= O) and esters (C-O), bending absorption (methylene (CH2) and methyl (CH3) groups) and double bond absorptions (C= O) are strong in pure oils and oil- alcohol mixtures.
format Thesis
qualification_level Master's degree
author Mohamad Al-Asfoor, Firas Kamel
author_facet Mohamad Al-Asfoor, Firas Kamel
author_sort Mohamad Al-Asfoor, Firas Kamel
title Thermal Effusivity And Refractive Index Of Oil-Alcohol Mixtures
title_short Thermal Effusivity And Refractive Index Of Oil-Alcohol Mixtures
title_full Thermal Effusivity And Refractive Index Of Oil-Alcohol Mixtures
title_fullStr Thermal Effusivity And Refractive Index Of Oil-Alcohol Mixtures
title_full_unstemmed Thermal Effusivity And Refractive Index Of Oil-Alcohol Mixtures
title_sort thermal effusivity and refractive index of oil-alcohol mixtures
granting_institution Universiti Putra Malaysia
granting_department Faculty: Science
publishDate 2009
url http://psasir.upm.edu.my/id/eprint/5705/1/A_FS_2009_11.pdf
_version_ 1747810467543252992

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