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Iraqi Journal of Chemical and Petroleum Engineering

المجلة العراقية للهندسة الكيمياوية وهندسة النفط

ISSN: 19974884
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:1

Article
Prediction of bubble size in Bubble columns using Artificial Neural Network

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Abstract

In the literature, several correlations have been proposed for bubble size prediction in bubble columns. However these correlations fail to predict bubble diameter over a wide range of conditions. Based on a data bank of around 230 measurements collected from the open literature, a correlation for bubble sizes in the homogenous region in bubble columns was derived using Artificial Neural Network (ANN) modeling. The bubble diameter was found to be a function of six parameters: gas velocity, column diameter, diameter of orifice, liquid density, liquid viscosity and liquid surface tension. Statistical analysis showed that the proposed correlation has an Average Absolute Relative Error (AARE) of 7.3 % and correlation coefficient of 92.2%. A comparison with selected correlations in the literature showed that the developed ANN correlation noticeably improved the prediction of bubble sizes. The developed correlation also shows better prediction over a wide range of operation parameters in bubble columns.

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Article
Nonlinear Adaptive Control of a pH Process

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Abstract

In this paper a nonlinear adaptive control method is presented for a pH process, which is difficult to control due to the nonlinear and uncertainties. A theoretical and experimental investigation was conducted of the dynamic behavior of neutralization process in a continuous stirred tank reactor (CSTR). The process control was implemented using different control strategies, velocity form of PI control and nonlinear adaptive control. Through simulation studies it has been shown that the estimated parameters are in good agreement with the actual values and that the proposed adaptive controller has excellent tracking and regulation performance.

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Article
Kinetic Study of Catalytic Hexane Isomerization

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Abstract

The isomerization of n-hexane on platinum loaded acidic zeolite was studied at atmospheric pressure, H2/nC6 molar ratios of 1-4 and temperature range of 240-270ºC. The measured kinetic data were fitted to an equation based on the bifunctional mechanism and by using independently obtained dehydrogenation and adsorption data. The activation energies of protonation (ΔHpro) and the elementary isomerization step (Eact,iso) and as well as the corresponding preexponential factor were simultaneously determined. The observed values of both ΔHpro and Eact,iso are in agreement with the results of quantum-chemical calculations.

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Article
Extraction of atropine from Datura Innoxia using liquid membrane Technique

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Abstract

Selective recovery of atropine from Datura innoxia seeds was studied. Applying pertraction in a rotating film contactor (RFC) the alkaloid was successfully recovered from native aqueous extracts obtained from the plant seeds. Decane as a liquid membrane and sulfuric acid as a stripping agent were used. Pertraction from native liquid extracts provided also a good atropine refinement, since the most of co-extracted from the plant species remained in the feed or membrane solution. Solid–liquid extraction of atropine from Datura innoxia seeds was coupled with RF-pertraction in order to purify simultaneously the extract obtained from the plant. Applying the integrated process, proposed in this study, a product containing 92.6% atropine was obtained.


Article
The Factors Affecting the Absorption of Ozone in Water

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Abstract

This study was concerned with using ozone gas in drinking water treatment plant at Ibn-Sina Company. The main purpose of this research is to find the best contactor for ozone unit proposed. An investigation was conducted to study the absorption of ozone by water in two type of absorber. The effects of the process variables (such as height of water column, contact time, and pH) on the amount of ozone absorbed were investigated. Box-Wilson central composite rotatable design is used to design the experimental work for the mentioned variables. It was found that the optimum value of the variables studied was: i) Height of water column (90 cm) ii) Contact time (17-18 min) iii) PH (7 - 7.5)

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Article
Purification of Zinc Oxide Using Direct Thermal Process by PetroleumCoke

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Abstract

The present investigation is concerned for the purification of impure zinc oxide (80-85 wt %) by using petroleum coke (carbon content is 76 wt %) as reducing agent for the impure zinc oxide to provide pure zinc vapor, which will be oxidized later by air to the pure zinc oxide. The operating conditions of the reaction were studied in detail which are, reaction time within the range (10 to 30 min), reaction temperature (900 to 1100 oC), air flow rate (0.2 to 1 l/min) and weight percentage of the reducing agent (petroleum coke) in the feed (14 to 30 wt %). The best operating conditions were (30 min) for the reaction time, (1100 oC) for the reaction temperature, (1 l/min) for the air flow rate, and (30 wt %) of reducing material (petroleum coke) in the feed. Under the above conditions, conversion of zinc oxide was (68.12 %) and the purity of the produced zinc oxide was (97.85 %) by using petroleum coke as reducing material.

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Article
Removal of Dyes from Wastewater of Textile Industries Using Activated Carbon and Activated Alumina

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Abstract

This work was carried to study the capability of activated alumina from bauxite compared with activated carbon adsorption capability to reduce the color content from Al-Hilla Textile Company wastewater. Six dyes were studied from two types(reactive and dispersed) namely (blue, red, yellow) from wastewater and aqueous solutions. Forty eight experiments were carried out to study the effect of various initial conditions (bed height, flow rate, initial concentration, pH value, temperature, and competitive adsorption) on adsorption process. The results showed that the adsorption process using activated carbon insured a good degree of color reduction reaching (99.7%) and was better than activated bauxite which reached (95%).

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Article
Kinetic Studies of Hydrodesulfurization of Vacuum Distillate

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Abstract

Vacuum gas oil (611-833)K was distilled from Kirkuk crude oil, which was obtained by blending the following fraction, light vacuum gas oil (611 - 650) K, medium vacuum gas oil (650-690)K, heavy vacuum gas oil (690-727)K and very heavy vacuum gas oil (727-833)K. The vacuum gas oil was hydrotreated on a commercial cobalt-molybdenum alumina catalyst presulfied at specified condition in a laboratory trickle bed reactor. The reaction temperature varied from (583-643)K over liquid hourly space velocity ranging between (1.5-3.75)h-1 , Hydrogen pressure was kept constant at 3.5 MPa with a hydrogen to oil ratio of about 250 L/L The conversion results for desulfurization appeared to obey the second order kinetics. According to this model rate constants for desulfurization reaction were calculated. Finally, the apparent activation energy (Ea), enthalpy of activation ( deltaH*) and entropy (delta S*) were calculated based on the values of rate constant (k). The calculated values of Ea, deltaH* and delta S* were 74.657 kJ/mole, 74.712 kJ/mole and 167.132 J/mole.k, respectively.

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