Determination of diffusion coefficients and activation energy of selected organic liquids using reversed-flow gas chromatographic technique

Evaporation of vaporize organic liquid has ecological consequences when the compounds are introduced into both freshwater and marine environments through industrial effluents, or introduced directly into the air from industrial unit processes such as bioreactors and cooling towers. In such cases, a...

Full description

Bibliographic Details
Main Authors:	Khalisanni Khalid, Rashid Atta Khan, Sharifuddin Mohd Zain
Format:	Article
Language:	English
Published:	Universiti Kebangsaan Malaysia 2012
Online Access:	http://journalarticle.ukm.my/5473/ http://journalarticle.ukm.my/5473/ http://journalarticle.ukm.my/5473/1/09%2520Khalisanni.pdf

id	ukm-5473
recordtype	eprints
spelling	ukm-54732016-12-14T06:38:33Z http://journalarticle.ukm.my/5473/ Determination of diffusion coefficients and activation energy of selected organic liquids using reversed-flow gas chromatographic technique Khalisanni Khalid, Rashid Atta Khan, Sharifuddin Mohd Zain, Evaporation of vaporize organic liquid has ecological consequences when the compounds are introduced into both freshwater and marine environments through industrial effluents, or introduced directly into the air from industrial unit processes such as bioreactors and cooling towers. In such cases, a rapid and simple method are needed to measure physicochemical properties of the organic liquids. The Reversed-Flow Gas Chromatography (RF-GC) sampling technique is an easy, fast and accurate procedure. It was used to measure the diffusion coefficients of vapors from liquid into a carrier gas and at the same time to determine the rate coefficients for the evaporation of the respective liquid. The mathematical expression describing the elution curves of the samples peaks was derived and used to calculate the respective parameters for the selected liquid pollutants selected such as methanol, ethanol, 1-propanol, 1-butanol, n-pentane, n-hexane, n-heptane and n-hexadecane, evaporating into the carrier gas of nitrogen. The values of diffusion coefficients found were compared with those calculated theoretically or reported in the literature. The values of evaporation rate were used to determine the activation energy of respective samples using Arrhenius equation. An interesting finding of this work is by using an alternative mathematical analysis based on equilibrium at the liquid-gas interphase, the comparison leads to profound agreement between theoretical values of diffusion coefficients and experimental evidence. Universiti Kebangsaan Malaysia 2012-09 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/5473/1/09%2520Khalisanni.pdf Khalisanni Khalid, and Rashid Atta Khan, and Sharifuddin Mohd Zain, (2012) Determination of diffusion coefficients and activation energy of selected organic liquids using reversed-flow gas chromatographic technique. Sains Malaysiana, 41 (9). pp. 1109-1116. ISSN 0126-6039 http://www.ukm.my/jsm/
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Kebangasaan Malaysia
building	UKM Institutional Repository
collection	Online Access
language	English
description	Evaporation of vaporize organic liquid has ecological consequences when the compounds are introduced into both freshwater and marine environments through industrial effluents, or introduced directly into the air from industrial unit processes such as bioreactors and cooling towers. In such cases, a rapid and simple method are needed to measure physicochemical properties of the organic liquids. The Reversed-Flow Gas Chromatography (RF-GC) sampling technique is an easy, fast and accurate procedure. It was used to measure the diffusion coefficients of vapors from liquid into a carrier gas and at the same time to determine the rate coefficients for the evaporation of the respective liquid. The mathematical expression describing the elution curves of the samples peaks was derived and used to calculate the respective parameters for the selected liquid pollutants selected such as methanol, ethanol, 1-propanol, 1-butanol, n-pentane, n-hexane, n-heptane and n-hexadecane, evaporating into the carrier gas of nitrogen. The values of diffusion coefficients found were compared with those calculated theoretically or reported in the literature. The values of evaporation rate were used to determine the activation energy of respective samples using Arrhenius equation. An interesting finding of this work is by using an alternative mathematical analysis based on equilibrium at the liquid-gas interphase, the comparison leads to profound agreement between theoretical values of diffusion coefficients and experimental evidence.
format	Article
author	Khalisanni Khalid, Rashid Atta Khan, Sharifuddin Mohd Zain,
spellingShingle	Khalisanni Khalid, Rashid Atta Khan, Sharifuddin Mohd Zain, Determination of diffusion coefficients and activation energy of selected organic liquids using reversed-flow gas chromatographic technique
author_facet	Khalisanni Khalid, Rashid Atta Khan, Sharifuddin Mohd Zain,
author_sort	Khalisanni Khalid,
title	Determination of diffusion coefficients and activation energy of selected organic liquids using reversed-flow gas chromatographic technique
title_short	Determination of diffusion coefficients and activation energy of selected organic liquids using reversed-flow gas chromatographic technique
title_full	Determination of diffusion coefficients and activation energy of selected organic liquids using reversed-flow gas chromatographic technique
title_fullStr	Determination of diffusion coefficients and activation energy of selected organic liquids using reversed-flow gas chromatographic technique
title_full_unstemmed	Determination of diffusion coefficients and activation energy of selected organic liquids using reversed-flow gas chromatographic technique
title_sort	determination of diffusion coefficients and activation energy of selected organic liquids using reversed-flow gas chromatographic technique
publisher	Universiti Kebangsaan Malaysia
publishDate	2012
url	http://journalarticle.ukm.my/5473/ http://journalarticle.ukm.my/5473/ http://journalarticle.ukm.my/5473/1/09%2520Khalisanni.pdf
first_indexed	2023-09-18T19:44:14Z
last_indexed	2023-09-18T19:44:14Z
_version_	1777405792444481536

Determination of diffusion coefficients and activation energy of selected organic liquids using reversed-flow gas chromatographic technique

Similar Items