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Phase equilibria behavior of carbon dioxide-n-hexane-naphthalene ternary system
Inas Muen AlNashef,Rasheed S. Al-Ameeri,Taher A. Al Sahhaf,Salah E. M. Hamam 한국화학공학회 2008 Korean Journal of Chemical Engineering Vol.25 No.6
The ternary system CO2-n-hexane-naphthalene was studied to determine the bubble point pressure at three different temperatures (40, 60 and 80 oC) and a fixed n-hexane to naphthalene mole ratio of 9 : 1. The experimental data obtained were predicted by using the Peng-Robinson equation of state with two interaction parameters. The experimental and calculated bubble point pressures were generally in good agreement at the three temperatures and over the composition range investigated.
Treatment of industrial low grade palm oil via esterification reaction using sonoreactor
Adeeb Hayyan,Mohd Ali Hashim,Mohamed E.S. Mirghani,Maan Hayyan,Inas M. AlNashef 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4
In this study, the reduction of free fatty acid (FFA) in low grade palm oil (LGPO) was conducted at various sonication times, ranging from 30 to 300 min. Screening of various acids was reported and selected acid was considered for further study. The results found that strong acids such as sulfuric acid to be superior to other acids. The FFA content of LGPO decreased from 20% to less than 3%, using sulfuric acid at optimum conditions. Treated LGPO can be used as a new type of fuel for various applications such as biodiesel production.
Investigating the electrochemical windows of ionic liquids
Maan Hayyan,Farouq S. Mjalli,Mohd Ali Hashim,Inas M. AlNashef,Tan Xue Mei 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.1
The structure effect on the electrochemical windows (EWs) was studied using cyclic voltammetry (CV) in 16 ionic liquids (ILs), consisting of various cations such as piperidinium, pyridinium, pyrrolidinium,phosphonium, morpholinium, ammonium, sulfonium and imidazolium, and anions including bis(trifluoromethylsulfonyl)imide, tris(pentafluoroethyl)trifluorophosphate, dicyanamide, trifluoroacetate and trifluoromethanesulfonate. It was found that all studied ILs have good EWs to be utilized as electrolytes in different electrochemical applications pertaining to industry. Furthermore, it was found that the structure of ILs affected the EW and both the cation and anion have important effect on the reductive and oxidative limits, respectively. The reductive limits of the studied ILs were found to follow the sequence of [P14,666]+ > [N112,1O2]+ > [HMPyrr]+ > [BMPyrr]+ > [EMIm]+ > [MOEMMor]+≈[MOPMPip]+ > [S222]+ > [BMPy]+≈[HPy]+≈ [HPPy]+. The oxidative limits were found to follow the sequence of [TFSI]ˉ > [TPTP]ˉ > [TfO]ˉ > [DCA]ˉ > [TFA]ˉ. 2012 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.