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Flammability Characteristics of Combustible Vapor Mixtures from Bio Oil

Umar, Nurul Amirah Hanim (2011) Flammability Characteristics of Combustible Vapor Mixtures from Bio Oil. Universiti Teknologi PETRONAS. (Unpublished)

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Abstract

Study of fire and explosion is very important mainly in industrial activities due to several accidents which have been reported in the past and present. This study investigates the possibility of the occurrence of fire accident occasioned by the vaporization of hydrocarbon components derived from bio oil sample. In this study, bio oil liquid sample containing mixtures of hydrocarbon products were produced by fast pyrolysis process using palm oil kernel shell as the main biomass source. The bio oil-liquid phase was analysed using Gas Chromatography Mass Spectrometry (GCMS) and Gas Chromatography Flame Ionization Detector (GC-FID) to examine the compositions of the sample Mole fractions of components in the liquid phase were obtained from the GC-FID analysis while the mole fractions of the components in gas phase were calculated via modified Raoult' s law. In this study, the gas mixture is considered as a real solution. The activity coefficients were calculated using Universal Functional Activity Coefficient (UNIFAC) method; while the fugacity coefficients were obtained by using Peng-Robinson method, which is implemented in ThermoSolver software. LFL and UFL values for mixture (LFLmix and UFLmix) were calculated according to Le Chatelier equation. The LFLmix and UFLmix values were used to construct the flannnability diagram and subsequently used to determine the flannnability of the mixture. In this study, the LFLmix for the mixture is calculated at 3.89vol% and 12.4vol% for UFLmix Meanwhile, the Limiting Oxygen Concentration (LOC) for the mixture is 1 0.69vol%. The findings of this study can be used to propose suitable inherent safer methods to prevent the flammable mixture from occurring and to minimizing the loss of properties, business and life due to fire accidents in bio oil production. The findings of this study also may assist in minimizing fire hazards associated with presence of hydrocarbon vapours derived from bio oil storage system.

Item Type: Final Year Project
Academic Subject : Academic Department - Chemical Engineering - Biofuel
Subject: T Technology > TP Chemical technology
Divisions: Engineering > Chemical
Depositing User: Users 2053 not found.
Date Deposited: 12 Nov 2013 14:55
Last Modified: 25 Jan 2017 09:41
URI: http://utpedia.utp.edu.my/id/eprint/10476

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