Table of content

Iraqi Journal of Chemical and Petroleum Engineering

المجلة العراقية للهندسة الكيمياوية وهندسة النفط

ISSN: 19974884/E26180707
Publisher: Baghdad University
Faculty: Engineering
Language: Arabic and English

This journal is Open Access

About

The Iraqi Journal of Chemical and Petroleum Engineering is a quarterly peer-reviewed scientific journal that was established in 2000 by the College of Engineering of the University of Baghdad. The Iraqi Journal of Chemical and Petroleum Engineering receives citations in the category of Chemical and Petroleum Engineering and relevant subjects.

Aims
The Iraqi journal of chemical and petroleum engineering is Open Access journal dedicated to publishing peer-reviewed research articles with respect to the subjects in fields of chemical and petroleum Engineering. In particular, petrochemical, biochemical, water treatment, electrochemical, petroleum and natural gas production and technology, and environment are the major interest of the journal. The journal aims to provide a free platform for the researches all over the world to share diverse types of knowledge and discuss the recent developments in the subjects related to the journal interest.

Objective
Objective of the journal is to promote the researches in the engineering subjects covered by journal to dissemination their intellectual products to the global community free of restriction. That achieves by making all of published articles available free of cost for all researcher through adopting Open Access publication model.

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Contact info

Aljadreah, Baghdad
Iraq
P.O Box: 47024
Phone: +964-1-7781506
Email: ijcpe@coeng.uobaghdad.edu.iq
ijcpe@yahoo.com

Table of content: 2009 volume:10 issue:4

Article
Drying of Solid Materials by Vacuum Fluidized Bed Dryer

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Abstract

In the present stu the performance of drying process of diffitrent solid materials by batch fluidized bed drying under vacuum conditions was investigated Three d solid materials, namely; ion exchange resin-8528, aspirin and paracetamol were uved The behavior of the dying curves as well t the rate of drying of these materials had been studied The experiments were carried gut in a 0.0381 m column diameter fluidized by hot air under vacuum conditions. variables affecting on the rate of drying were studied, these variables are vacuum pressure ( - 500 mm fig), air temperature (303-323 K) particle size (0.3-0.8 mm) and initial moisture content (0.35-ass g/gsolid)for resin and (U I-U2 g/g solid) for aspirin and paracetamol. The study of the characteristics of the dying curves showed that the drying behavior depends mainly on the type of the solid material and on the operating conditions. It was found that the drying rate at vacuum conditions is enhanced by increasing the operating temperature of the air and decreases by increasing the initial moisture content of the material and the particle size. Moreover, an experiment was carried out to study the drying of aspirin solid material which is dried in atmospheric fluidized bed dryer operating at the same conditions to compare the temperature and time needed in both techniques. It was found that the temperature neededfor vacuum fluidized bed dryer (303 K) is less than needed by fluidized bed dryer operating at atmospheric pressure (323 K. A simpl (fled model for the drying of solids in the constant-rate period in a batch Jluidized bed is developed, considering the bed to consist of dense phase and bubble phase with heat and mass tran. between the phases. ft is assumed that the solids in dense phase to be in thermal equilibrium with the interstitial gas in the dense phase. The bubble size, its rise velocity, and the bubble volume fraction are taken into account while developing the modeL The model i.s- compared with experimental data reported in this study and found to match satisfactorily.

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Article
Differences Between Sodium Metasilicate and Silicic Acid as Silica Source for Zeolite Y Nanoparticles Synthesis by Sol- Gel Method

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Abstract

Zeolite Y nanoparticles were synthesized by sal — gel method Different samples using two silica sources were prepared. Sodium metasilicate (Na2Si03) (48% silica) and silicic acid silica (H2SIO3) (75% silica) were employed as sihca source and aluminum nitrate (Al(N03)3.9H20) was the aluminum source with tetrapropylammonium hydroxide(TPA Of- as templating agent. The synthesized samples were characterized by X-ray dW?action, showed the requirement different aging time for complete crystallization to be achieved. Transmission Electronic Microscope (TEM) images, showed the particles were in the same range of 30 — 75 nm PT-JR spectroscopy, showed the synthesized samples having the zeolite Y crystal properties. The initial mixing silica to alumina raao (5i02/A was 10, but, sodium metasilicate sample was of 2.55 final ratio, while silicic acid sample have 18.41 and the surface area as tested by BET was of 55587 m2/g from sodium metasilicate sample and 276.3 m2/gfrom silicic acid sample.


Article
Corrosion Inhibition of Aluminum Alloy 5083

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Abstract

The corrosion inhibition of aluminum alloy .5083 by an environment friendly compound called (8- Hydroxyquinoline) in acidic and alkaline solutions ofpH (2 and 12) respectively were studied using weight loss and polariza techniques. Also to examine the main and combined effects of the inhibitor concentration, pH. and contact time using factorial experimental design. Results show that corrosion rate decreased with increasing both inhibitor concentration and contact time and increased with increasing pH value. The polarization curves show that 8-hydroxyquinoline is a cathodic inhibitor


Article
Mixed Convection in an Horizontal Rectangular Duct lncluding interior Circular Core With Time Periodic Boundary Condition

Authors: Manal H. AL-Hafidh
Pages: 27-38
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Abstract

Numerical investigation was done for steady state laminar mixed convection and thermally and hydrodynarnic f developed flow through horizontal rectangular duct including circular core with two cases of time periodic boundary condition, first case on the rectangular wall while keeping Gore wall constant and other on both the rectangular duet and core walls. The used govenilng equations are continu4y, momentum and energy equations. These equations are normalized and solved using the Vorticity-Stream function and the Body Fitted Coordinates (HF C) methods. The finite d4fference approach with the Line Successive Over-Relaxation (LSOR) method is used to obtain all the computational results. The (BEC) method is used to generate the grid of the problem. A computer program (Fonran 90) is built to calculate the Nusselt number (I/u) in steady state. The fluid Prandtl number is 0.7, Rayleigh number (1 Reynolds number (IsRes2000f For the range of parameters considered results show that the time periodic boundary condition enhance heat transfer. It is also indicated in the results that heat transfer from the surface of the circle exceeds that of the rectangle duct. Comparisons with other researches show good agreement.


Article
Monitoring of Evaporated Cooling Tower

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Abstract

The present study was conducted for monitoring of the evaporative cooling tower in methanol production plant using digital computer. Visual Basic computer program was usedfor the monitoring of the performance of the cooling tower. The structure program consists of sub programs andforms to show all the related variables such as temperature, flaw rate, pressure .... etc. that affect the cooling tower operation and give alarms and important functional information regarding these variables

Keywords

Monitoring --- cooling tower


Article
Bio-production of Ethanol in Packed Bioreactor

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Abstract

A lab-scale packed Biofilm reactor was usedfor ethanol production by fermentation of sugar solution using a local isolatedy east saccharomycesc erevisia and glutaraldelrydeo n gelating as a covalent bounding agent.I n this studyf our rypes ofpacking in the reactor were used. They are; polypropylene mesh, glass rashig rings, ceramic rashig rings and glass beads. Glucose solutions were used as substrate withfour concentrations; (5, 10,15, 20 g/U. Results show that the ethanol productivity was increase with increasing sugar concentration. Also it was found that polypropylene mesh packing give the highest productivity while glass beads gives the lowest productivity. The experiments were conducted at three temperatures; 30, 35, 40'C. Highest value of productivity was obtained at 35"C. Finally results show that ethqnol productivity increased with increasing the feed ratio ofyeast / sugar.

Keywords

Bioreactor --- Ethanol --- Packed bed --- Fermentation


Article
Mass Transfer Correlations for a Rotating Cylinder Electrode under Isothermal and Controlled Heat Transfer Condition

Authors: S.H.ALWASH
Pages: 49-55
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Abstract

Mass transfer correlations for iron rotating cylinder cZech-ode in chloride solution, under isothermal and controlled heat transfer conditions, were derived Limiting current density values for the oxygen reduction reaction from potentiostatic experiments at d(fJ bulk temperatures and various turbulent flow rates, under isothennal and heat transfer conditions, were used/or such derivation. The corelations were analogous to that obtained by Eisenberg et all and other workers.

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Article
Prediction of the Point Efficiency of Sieve Tray Using Artificial Neural Network

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Abstract

An application of neural network technique was introduced in modeling the point efficiency of sieve tray, based on a data bank of around33l data points collected from the open literature.Two models proposed,using back-propagation algorithm, the first model network consists: volumetric liquid flow rate (QL), F foctor for gas (FS), liquid density (pL),gas density (pg), liquid viscosity (pL), gas viscosity (pg), hole diameter (dH), weir height (hw), pressure (P) and surface tension between liquid phase and gas phase (o). In the second network, there are six parameters as dimensionless group: Flowfactor (F), Reynolds numberfor liquid (ReL), Reynolds numberfor gas through hole (Reg), ratio of weir height to hole diqmeter (hw/dH), ratio of pressure of process to atmosphere pressure (P/Pa), Weber number (lTe). Statistical analysis showed that the proposed models have an average absolute relative enor (AARE) of 9.3% and standard deviation (SD) of 9.7%forfirst model, AARE of 9.35% and SD of 10.5%for second model and AARE of 9.8% and SD of 7.5%for the third model.

Table of content: volume:10 issue:4