Light naphtha is one of the products from distillation column in oil refineries used as feedstock for gasoline production. The major constituents of light naphtha are (Normal Paraffin, Isoparaffin, Naphthene, and Aromatic). In this paper, we used zeolite (5A) with uniform pore size (5A) to separate normal paraffin from light naphtha, due to the suitable pore size for this process and compare the behavior of adsorption with activated carbon which has a wide range of pores size (micropores and mesopores) and high surface area. The process is done in a continuous system-Fixed bed column-at the vapor phase with constant conditions of flow rate 5 ml/min, temperature 180 o C, pressure 1.6 bar and 100-gramweight of each adsorbent according to many other experiments on zeolite (5A) and choose the best conditions for comparison. The molecular sieve (5A) separated the normal paraffin (C 4 -C 8 ) from light naphtha feed with highest percentage removal reaching a (92.36 %) at the beginning of the process. Activated carbon separated naphthene and aromatics with highest percentage removal reaching a (95.3 %) for naphthenes and a (100 %) for aromatics at the beginning of the separation process. The study shows the difference in physical adsorption behavior and the effect of pore size on these processes.

The aggressive effect of chloride anion in comparison to iodide anion on the pitting corrosion attack of 304 and 304L stainless steel (SS) alloys was investigated by using the cyclic potentiodynamic polarization test at 0.6 M Sodium Halide salts (NaX) solution and different temperatures. The two alloys 304 and 304L SS suffered from severe pitting corrosion at room temperature up to 50˚C in a chloride containing solution with the higher resistance observed for 304L in comparison to the 304 while on pits were detected in iodide solution for both alloys. The pitting potentials of the two alloys in 0.6 M NaCl solution reduced with the increase of the temperature. Examination of the alloys' surfaces was conducted by using the scanning electron microscopes where it revealed that the occurrence of pitting attack seems like hemispherical or irregular pits with different sizes.

As a promising energy storage device, the rechargeable Zinc-air fuel cells (ZAFCs) has attracted an increasing attention because of their high energy density, cost-effectiveness, non-toxic (in terms of the manufacturing materials of the cell as well as the products of the reactions), the rich abundance of zinc, compact system design, as well as its environmental benignity. Rechargeable Zinc-air fuel cells (ZAFCs) are investigated as a possible technology for fast responding large-scale electrical energy. a broad study was performed to examine the influence of different ranges of parameters such as electrolyte flow rate (0-250 mL/min), electrolyte concentration (10- 60% by weight KOH), electrolyte temperature (26-60°C), active or passive air supply (0-8 L/min), and the effects of each parameter on the cell performance was studied and analysed and the best parameters were chosen to maintain the most effective cell operation.

This investigation was carried out to study the treatment and recycling of wastewater in the Battery industry for an effluent containing lead ion. The reuse of such effluent can only be made possible by appropriate treatment method such as electro coagulation.The electrochemical process, which uses a cell comprised aluminum electrode as anode and stainless steel electrode as cathode was applied to simulated wastewater containing lead ion in concentration 30 – 120 mg/l, at different operational conditions such as current density 0.4-1.2 mA/cm2, pH 6 -10 , and time 10 - 180 minute.The results showed that the best operating conditions for complete lead removal (100%) at maximum concentration 120 mg/l was found to be 1.2 mA/cm2 current density, in alkaline media pH = 10 , and at 120 minute.

Oil well drilling fluid rheology, lubricity, swelling, and fluid loss control are all critical factors to take into account before beginning the hole's construction. Drilling fluids can be made smoother, more cost-effective, and more efficient by investigating and evaluating the effects of various nanoparticles including aluminum oxide (Al2O3) and iron oxide (Fe2O3) on their performance. A drilling fluid's performance can be assessed by comparing its baseline characteristics to those of nanoparticle (NPs) enhanced fluids. It was found that the drilling mud contained NPs in concentrations of 0,0.25, 0. 5, 0.75 and 1 g. According to the results, when drilling fluid was used without NPs, the coefficient of fraction (CoF) was 44%, when added Al2O3 NP and Fe2O3 NP at 0.75g reduced CoF by 31% and 33% respectively. When Al2O3 and Fe2O3 NPs were used, particularly at a concentration of 1g, the amount of mud filtration decreased from 13.5ml to 9.3 ml and 8.5 ml respectively. Additional improvements rheological properties as well as swelling when Fe2O3NPs and Al2O3 NPs were added at 1g. Overall, it was found that adding NPs to the Lignosulfonate-WBM at a concentration of 1g can improve rheological, swelling, and filtration properties as well as lubrication at 0.75g.