Risk assessment evaluation of hexane storage tank in a sunflower oil plant by using areal location of hazardous atmosphere (ALOHA)

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2022-11-28

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Sevim, Ayşenur

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The purpose of risk assessment about hexane gas as a hazardous chemical is to prevent losses resulting from accidents arranging from injury to death and disasters impacting products, factories, employees, and the environment. Since hexane gas especially in storage tanks is easily flammable, evaporates, and is toxic, this chemical is vulnerable to an accident. The aim of this work is to examine the outcomes of hexane gas in a storage tank in the case of fire or expansion in the extraction unit of a sunflower oil factory. Moreover, as edible oils gain a significant role in human nutrition due to the main energy source with numerous usage purposes and oil growing demand by the excessive growth of the world population, efficiency in the production of sunflower oil from its seed is increased by new modern methods such as chemical extraction by hexane. To make this investigation on the storage tank of hexane during chemical extraction of sunflower oil, the Areal Location of Hazardous Atmosphere (ALOHA) software is applied by simulating three different scenarios as leakage of hazardous chemicals as hexane from its storage tank to the environment without fire (first scenario), during this dispersion with pool fire formation (second scenario), the release of hexane gas with boiling liquid expanding vapor explosion (BELEVEs) (third scenario). These different scenarios will be identified and examined in this thesis to prevent potential accidents. This work will further help to detect threats and safety zones under adverse atmospheric conditions depending on physicochemical feature of hexane gas.

Subject Keywords

Hexane, Hazardous chemical storage tank, ALOHA, Explosion, Gas cloud dispersion

URI

https://hdl.handle.net/11511/101164

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

A. Sevim, “Risk assessment evaluation of hexane storage tank in a sunflower oil plant by using areal location of hazardous atmosphere (ALOHA),” M.S. - Master of Science, Middle East Technical University, 2022.