Universiti Teknologi Malaysia Institutional Repository

Improved quality of liquefied petroleum gas via non-stirred blending

Zakaria, Z. and Ibrahim, N. and Amin, M. S. and Samsuri, A. and Ismail, I. (2017) Improved quality of liquefied petroleum gas via non-stirred blending. International Journal of Innovations in Engineering and Technology (IJIET), 8 (3). pp. 138-147. ISSN 2319-1058


Official URL: http://dx.doi.org/10.21172/ijiet.83.020


Liquefied Petroleum Gas (LPG) which contains more than 0.1% mole of butadiene is classified as a carcinogen and mutagen and regulatory have set the limit of butadiene to be below 0.5 % mole in LPG mixture. LPG suppliers in Malaysia are facing problem since butadiene level from one port exceeded 0.5 % mole. By blending of LPG from other ports might produce LPG products which satisfy the regulatory limit. The study focused on homogeneous blending time in a 17.28 m3 tank without artificial mechanical equipment through simulation modelling by Fluent 6.2.16 with two sources of LPG which were Ports A and B. The results showed that as the volume of LPG with butadiene increased, the butadiene level in mixed LPG also increased. The mass fraction between Ports A and B was below than 93% and 7% produced mixed LPG product within the regulatory limit. The blending time is approximately 3.98 hours to achieve homogeneous product mixture with a constant flow rate of 0.52 kg/s. Numerical modelling reveals that the effect of liquid-liquid diffusion by Wilke-Chang correlation does not significantly affect the blending time for homogeneous mixture. In fact the required blending time is shorter compared to blending time estimated by numerical modeling.

Item Type:Article
Uncontrolled Keywords:LPG, butadiene, non-stirred blending, numerical modeling, simulation modelling
Subjects:T Technology > TP Chemical technology
Divisions:Chemical Engineering
ID Code:80503
Deposited By: Fazli Masari
Deposited On:22 May 2019 14:48
Last Modified:22 May 2019 14:48

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