Papers by Malik M . Mohammed
Influence of Nacl and Feco3 Ions on Gas Hydrate Formation in Meg-Enhanced Aqueous Solutions
Istraživanja i projektovanja za privredu, 2023
Adding nanomaterials to quenching media is an innovative method to alter alloys' mechanical prope... more Adding nanomaterials to quenching media is an innovative method to alter alloys' mechanical properties and enhance their resistance to wear. In this work, TiO2 nanoparticles were added to the oil as a quenching media in different mass percentages (0, 0.2, 0.4, and 0.6%) to identify the impact of adding TiO2 nanoparticles on wear resistance (dry sliding) and mechanical properties by microstructure analysis of carbon steel CK45 before and after the addition of nanofluid. The results reveal the critical role of adding nanomaterials in altering steel's mechanical properties and increasing its resistance to wear. Specifically, increasing the TiO2 nanoparticle percentage improves the wear resistance value under different loads (20, 30, and 40 N). Also, the homogenous microstructure and mechanical properties were enhanced after using nanotechnology. That means the nanotechnology can protect CK45 from wear to be used for dies structure parts by quenching process.
Journal of Engineering
Used cooking oil was undergoing trans-esterification reaction to produce biodiesel fuel. Method o... more Used cooking oil was undergoing trans-esterification reaction to produce biodiesel fuel. Method of production consisted of pretreatment steps, trans-esterification, separation, washing and drying. Trans-esterification of treated oils was studied at different operation conditions, the methanol to oil mole ratio were 6:1, 8:1, 10:1, and 12:1, at different temperature 30, 40, 50, and 60 º C, reaction time 40, 60, 80, and 120 minutes, amount of catalyst 0.5, 1, 1.5, and 2 wt.% based on oil and mixing speed 400 rpm. The maximum yield of biodiesel was 91.68 wt.% for treated oils obtained by trans-esterification reaction with 10:1 methanol to oil mole ratio, 60 º C reaction temperature, 80 minute reaction time and 0.5 wt.% of NaOH catalyst. The physical properties such as specific gravity, kinematic viscosity, acid number, flash point, pour point, and water content, were measured and compared them with American Standard Test Methods (ASTM D6751). The results of these properties for biodies...
Al-Khwarizmi Engineering Journal
Citric acid is an essential ingredient for the manufacture of (12) key industrial chemicals. Citr... more Citric acid is an essential ingredient for the manufacture of (12) key industrial chemicals. Citric acid use is increasing steadily with a high annual growth rate as a result of the development of ever more sophisticated applications. Citric acid is widely utilized in the food and pharmaceutical industries due to its low toxicity when compared to other acidulous. Other uses for citric acid can be found in cleaning supplies and detergents. Based on information from a review of the literature, Citric acid production substrates and methods for surface fermentation, submerged fermentation, solid-state fermentation, and international market expansion are all covered in the current review study. Finally, there is still much to learn about the circumstances of the production of citric acid from raw materials, microorganisms, and fermentation techniques to achieve the best production in terms of cost and quality.
Al-Khwarizmi Engineering Journal, Jun 5, 2023
Citric acid is an essential ingredient for the manufacture of (12) key industrial chemicals. Citr... more Citric acid is an essential ingredient for the manufacture of (12) key industrial chemicals. Citric acid use is increasing steadily with a high annual growth rate as a result of the development of ever more sophisticated applications. Citric acid is widely utilized in the food and pharmaceutical industries due to its low toxicity when compared to other acidulous. Other uses for citric acid can be found in cleaning supplies and detergents. Based on information from a review of the literature, Citric acid production substrates and methods for surface fermentation, submerged fermentation, solid-state fermentation, and international market expansion are all covered in the current review study. Finally, there is still much to learn about the circumstances of the production of citric acid from raw materials, microorganisms, and fermentation techniques to achieve the best production in terms of cost and quality.
Enhancing oxygen scavenging properties of erythorbic acid through transition metal catalysis
Process Safety and Environmental Protection
Self-healing of concrete using bacteria: investigation of the impact of the process’s conditions
Innovative Infrastructure Solutions
A comparison study of methyl green removal by peroxi-coagulation and peroxi-electrocoagulation processes
Cleaner Engineering and Technology
Investigated kerosene-diesel fuel performance in internal combustion engine
Cleaner Engineering and Technology
Methane activation on metal oxide nanoparticles: spectroscopic identification of reaction mechanism
Particulate Science and Technology
Desulfurization of heavy naphtha by oxidation-adsorption process using iron-promoted activated carbon and Cu+2-promoted zeolite 13X
Catalysis Communications
The impact of using rice husk ash as a replacement material in concrete: An experimental study
Journal of King Saud University - Engineering Sciences
Studying the Factors Effects on the Flowability of ZnO-CuO/γAl2O3 Catalyst Through Hopper Before Tableting Process
Iraqi Journal of Chemical and Petroleum Engineering, 2004
Effect of using Two Binders on the Agglomeration of Zeolite Type 4A
Iraqi Journal of Chemical and Petroleum Engineering, 2002
The Manufacture of Lead Acid Battery Separators using Locally Produced Polyethylene
Iraqi Journal of Chemical and Petroleum Engineering, 2004
In this investigation a high density polyethylene (HDPE) was used as a substitute to polyvinylchl... more In this investigation a high density polyethylene (HDPE) was used as a substitute to polyvinylchloride in the production of lead acid battery separators. This has been achieved by preparing mixtures of different percentages of the feed materials which include a high density polyethylene (HDPE) locally produced, filler materials such as silica and oils such as dioctylphthalate (DOP) or paraffin which were added to the mixture to improve the final properties of the separator. The materials were compounded by two roll-mills under the same conditions. The following parameters are involved: 1- Studying the use of a high density polyethylene as a binder to film components with (15-30) wt.%. 2- Studying the use of finely divided silica sand with (25-45) wt.% as a medium to oil adsorption. 3- Studying the use of two type plasticizers (Paraffin or DOP) with (35-55) wt. %. as a creative medium to films porosity. The best results of the feed materials in the mixture were selected so as to give the highest porosity using 15 wt. % PE, 30 wt. % filler, and 55 wt. % oil. It h
Spectrophotometric study of ephedrine hydrochloride in drug using molecular absorption UV–Visible
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2021
A simple, rapid, accurate, and sensitive UV-Visible spectrophotometric method has been developed ... more A simple, rapid, accurate, and sensitive UV-Visible spectrophotometric method has been developed to estimate ephedrine hydrochloride (Eph) in pharmaceutical drugs. This method is based on preparing chelate complex through the reaction between Eph and cobalt ion (Co (II)). Ephedrine identification is done as an Eph - Co (II) complex after extraction by chloroform at λ max 389 nm. In this work, the optimum operation conditions such as pH, buffer volume, Co ion concentration, time of reaction and extraction, temperature, and water to organic volume ratio were determined. The linearity range of Eph has observed in the range between 1 and 80 ppm, at a wavelength of 387 nm with molar absorptivity range between 3.1867 × 103 to 1.6941 × 103(L·mol-1·cm-1) and metal to legend ratio of two. The results obtaind from this study are as follow: relative standard deviation (RSD) percentage is 0.303%, detection limit (D.L) = 0.94 ppm, Sandel's sensitivity (S) = 0.0135, relative error (Erel.) % = 0.039, recovery (Rec.) %=100.039. The results confirmed no interferences of excipients on the detection of Eph, and the proposed method has successfully applied for the determination of ephedrine-HCl in pure and pharmaceutical preparations. This method has several advantages, such as its low cost, high sensitivity, and ease of operation.
Synthesis of ZnO-CoO/Al2O3 nanoparticles and its application as a catalyst in ethanol conversion to acetone
Results in Chemistry, 2021
Al-Khwarizmi Engineering Journal, 2009
One of the most important problems in tablet process is to control the flow of the catalyst throu... more One of the most important problems in tablet process is to control the flow of the catalyst through the hopper; Controlling the flow can be done either by changing the size of particles or added the different lubricant (stearic acid, starch, graphite) or blending of different lubricants. The study showed that we can control (increase or decrease) on the flow of the catalyst through the hopper by blending different lubricants for the constant percentage. The flow increasing when particles size (0.6 mm) and then decrease with or without lubricants, no effect on flow when particles size lower than (0.2 mm) with use that lubricants, and good flow on (0.4 mm) when use stearic acid and starch.
Al-Nahrain Journal for Engineering Sciences, 2008
The present work is concerned with the preparation of polyurethane elastomers. Polyurethane elast... more The present work is concerned with the preparation of polyurethane elastomers. Polyurethane elastomer was prepared by the bulk polymerization via one 4,4'diphenyl methane polypropylene glycol using stannous octeate as a catalyst. The operating conditions of the polymerization were studied and their affects on the mechanical properties of the prepared elastomer. with 4,4'diphenyl methane diisocyanate to equivalent of polypropylene glycol (NCO/OH) (1.5- 3), and curing temperature of about mechanical properties of polyuretha elastomers were: Kinetic of the reaction also was studied using adiabatic temperature rise method. The overall order of reaction was of the reaction was frequency coefficient of reaction ( (mole/g mixture)
Adsorption of methyl green stain from aqueous solutions using non-conventional adsorbent media: Isothermal kinetic and thermodynamic studies
Bioresource Technology Reports, 2021
Abstract Eggshell waste which is a serious issue that faces the authorities of food industries wa... more Abstract Eggshell waste which is a serious issue that faces the authorities of food industries was used to adsorb methyl green stain from aqueous solutions. The impact of pH solution of several parameters on the removal efficiency was investigated. The results show that the maximum percent of removal was 69.38 ± 3% and it was directly proportional with pH, agitation speed, adsorbent dose, and contact time. While the relation with temperature and initial concentration was inverse. The isotherm, kinetic and thermodynamic studies were also done under the system optimum conditions. The results show that the pseudo-second order kinetic model and Langmuir isotherm model are the best models that describe the adsorption system, while the thermodynamic investigation illustrates that the removal process was endothermic, spontaneous, and less entropic. This work provides detailed information about an innovative method to utilize eggshell waste as an inexpensive adsorbent to remove methyl green stain from aqueous solutions.
Uploads
Papers by Malik M . Mohammed