نتایج جستجو برای: liquid gas

تعداد نتایج: 442481  

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2012
fatemeh yazdian, sayed abbas shojaosadati mohsen nosrati mahdi pesaran haji abbas ebrahim vasheghani-farahani

the mixing behavior of the gas-liquid phase in three loop bioreactors was investigated. a gas-induced external airlift loop bioreactor (ealb), a forced-liquid vertical tubular loop bioreactor (vtlb) and a forced-liquid horizontal tubular loop bioreactor (htlb) were used for mixing studies as well as biomass production from natural gas. the effect of design parameters, riser to downcomer cross s...

Journal: :international journal of environmental research 2010
s. shegefti h. sereshti s. samadi

water contamination due to the wide variety of pesticides used in agriculture is a global environmental pollution problem. in order to reach at sub-î¼gl-1 levels of detection, an efficient extraction technique is required. a simple, fast and economical method, dispersive liquid-liquid micro extraction (dllme), followed by gas chromatography-mass spectrometry was assessed for determining endosul...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2007
mahmoud gorji ramin bozorgmehry boozarjomehry mohammad kazemeini

multiphase impeller stirred tank reactors enhance mixing of reacting species used in a variety of chemical industries. these reactors have been studied based on computational fluid dynamics (cfd) that can be used in the analysis, design and scale up of these reactors. most of the researches done in this area are limited to single phase reactors, and a few remaining two phase flow investigations...

Ebrahim Vasheghani-Farahani Fatemeh Yazdian, Mahdi Pesaran Haji Abbas Mohsen Nosrati Sayed Abbas Shojaosadati,

The mixing behavior of the gas-liquid phase in three loop bioreactors was investigated. A gas-induced External Airlift Loop Bioreactor (EALB), a forced-liquid Vertical Tubular Loop Bioreactor (VTLB) and a forced-liquid Horizontal Tubular Loop Bioreactor (HTLB) were used for mixing studies as well as biomass production from natural gas. The effect of design parameters, riser to downcomer cro...

Journal: :journal of membrane science and research 0
zabih a. tarsa chemical engineering department, mahshahr branch, islamic azad university, mahshahr, iran s. ali asghar hedayat chemical engineering department, mahshahr branch, islamic azad university, mahshahr, iran masoud rahbari-sisakht chemical engineering department, gachsaran branch, islamic azad university, gachsaran, iran

in this research, process asymmetric polyetherimide hollow fiber membranes using ethanol (0, 2 and 4 wt%) as non-solvent additive in the polymer dope via phase inversion method were fabricated. aqueous solution of 1-methyl-2-pyrrolidine (nmp) (90%) was applied as a bore fluid to avoid inner skin layer formation and water was used as the external coagulant. the morphology of fabricated membranes...

Journal: Gas Processing 2017

Natural gas usually contains significant amounts of acid gases when it is extracted from underground reservoirs. Therefore, it must be treated by appropriate processes to remove these acidic components. In this study, the simultaneous absorption of carbon dioxide and hydrogen sulfide from natural gas into diethanol amine solution was simulated using CFD. Absorption process was performed in a we...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2008
farshad abbasi hasan rahimzadeh

in this study, gas evolution in a vertical electrochemical cell is investigated numerically with a modified two-fluid model. the mathematical model involves solution of separate transport equation for the gas and liquid phases with an allowance to inter-phase transfer of mass and momentum. the governing equations are discreted via the finite volume technique and then are solved by the simple al...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2014
ali asghar gharesheikhloo mahmoud moayyedi

constructing phase diagram and its subsequent quality lines for lean gas condensate reservoirs is always crucial and challenging topic in reservoir fluid studies. due to small amounts of liquid drop-outs in lean gas condensates at reservoir conditions, full experimental tracking of phase diagram and its relevant quality lines is almost impossible for lean gas condensates.on the other hand, eos ...

Journal: :iranian journal of basic medical sciences 0
rana fazeli-bakhtiyari liver and gastrointestinal diseases research center, tabriz university of medical sciences, tabriz, iran department of analytical chemistry, faculty of chemistry, university of tabriz, tabriz, iran vahid panahi-azar drug applied research center, tabriz university of medical sciences, tabriz, iran mohammad hossein sorouraddin department of analytical chemistry, faculty of chemistry, university of tabriz, tabriz, iran abolghasem jouyban pharmaceutical analysis research center and faculty of pharmacy, tabriz university of medical sciences, tabriz, iran

objective(s): dispersive liquid-liquid microextraction coupled with gas chromatography (gc)-flame ionization detector was developed for the determination of valproic acid (vpa) in human plasma. materials and methods: using a syringe, a mixture of suitable extraction solvent (40 µl chloroform) and disperser (1 ml acetone) was quickly added to 10 ml of diluted plasma sample containing vpa (ph, 1.0...

M. H. Rahimian and M. Farshchi,

The internal flow circulation dynamics of a liquid drop moving in a co- or counter-flowing gas stream has been numerically studied. The present work is concerned with the time accurate numerical solution of the two phase flow field at the low Mach number limit with an appropriate volume tracking method to capture motion and deformation of a liquid drop. It is shown that relative velocity betwee...

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