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The effect of vacuum pressure on the flammability limits of liquefied petroleum gas (LPG) / Norazma Mukhtar

By:

Norazma Mukhtar

Material type: Text

TextPublication details: Kuantan, Pahang : UMP, 2010Description: xiii, 55 p. : ill. ; 30 cm. + 1 CD-ROMISBN:

THE0004699(Local)

Subject(s):

Liquefied petroleum gas

Dissertation note: Project paper (Bachelor of Chemical Engineering (Gas Technology)) -- Universiti Malaysia Pahang - 2010 Abstract: The Liquefied Petroleum Gas (LPG) is a flammable mixture of hydrocarbon gases. In transportation or handling the LPG gases, it is very important to know the flammability limits and the pressure of the gas to avoid any accident or explosion occurred. The pressure of LPG takes part in the flammability limits either Upper Flammability Limit (UFL) or Lower Flammability Limit (LFL). So, the aims of this research are to investigate the effect of vacuum pressure on the flammability limits of LPG/air. The experiments are performed in a 20 L spherical explosion vessel. The mixtures are ignited using spark permanent wire that place at the centre of the vessel. The pressures are used starting from 0.96 bar up to 1.0 bar. The pressure-time variations during explosions of LPG/air mixtures in explosion vessel are recorded. The explosion pressure data is used to determine the flammability limits which flame propagation is occurred if explosion pressure greater than 0.96 bar. In this experiment, the result shows the LFL is decrease when the pressure decreasing but, UFL is increasing with the increasing of pressure. The LFL for 0.98 bar is 2 volume % of LPG and for 0.96 bar is 1 volume % of LPG. The UFL for 0.98 bar and 0.96 bar are the same which is 8 volume % of LPG. But the Pm for UFL for 0.98 bar is 0.7 bar and Pm for UFL for 0.96 bar is 0.9 bar.

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Holdings ( 2 )
Title notes ( 3 )

Holdings
Item type	Current library	Call number	Copy number	Status	Date due	Barcode
Final Year Report	UMPLIB GAMBANG	TP359.L5 N67 2010 rs Bc. (Browse shelf(Opens below))	1	Not for loan		0000060825
Final Year Report	UMPLIB GAMBANG	CD 5578 \| TP359.L5 N67 2010 rs Bc. (Browse shelf(Opens below))	1	Not for loan		0000060826

Project paper (Bachelor of Chemical Engineering (Gas Technology)) -- Universiti Malaysia Pahang - 2010

Bibliography : p. 37-39

The Liquefied Petroleum Gas (LPG) is a flammable mixture of hydrocarbon gases. In transportation or handling the LPG gases, it is very important to know the flammability limits and the pressure of the gas to avoid any accident or explosion occurred. The pressure of LPG takes part in the flammability limits either Upper Flammability Limit (UFL) or Lower Flammability Limit (LFL). So, the aims of this research are to investigate the effect of vacuum pressure on the flammability limits of LPG/air. The experiments are performed in a 20 L spherical explosion vessel. The mixtures are ignited using spark permanent wire that place at the centre of the vessel. The pressures are used starting from 0.96 bar up to 1.0 bar. The pressure-time variations during explosions of LPG/air mixtures in explosion vessel are recorded. The explosion pressure data is used to determine the flammability limits which flame propagation is occurred if explosion pressure greater than 0.96 bar. In this experiment, the result shows the LFL is decrease when the pressure decreasing but, UFL is increasing with the increasing of pressure. The LFL for 0.98 bar is 2 volume % of LPG and for 0.96 bar is 1 volume % of LPG. The UFL for 0.98 bar and 0.96 bar are the same which is 8 volume % of LPG. But the Pm for UFL for 0.98 bar is 0.7 bar and Pm for UFL for 0.96 bar is 0.9 bar.