Ali Reza Solaimany Nazar

Department of Chemical Engineering, Faculty of Enginerring ,University of Isfahan, Isfahan, IRAN

[ 1 ] - Effect of anions interaction on the removal efficiency of nanofilters for the potable water treatment

The interaction between the ions and the charge of membranes can affect the efficiency of pollutant removal. The present study investigated the removal efficiency of hexavalent chromium and nitrate ions from both actual and synthetic contaminated water via two different commercial spiral wound polyamide nanofilters. In addition, the interaction of ions under different experimental conditions wa...

[ 2 ] - The effects of operating factors on the removal of total ammonia nitrogen and florfenicol antibiotic from synthetic trout fish farm wastewater through nanofiltration

An aquaculture system can be a potentially significant source of antibacterial compounds and ammonia in an aquatic environment. In this study, the removal of total ammonia nitrogen and florfenicol antibiotic from synthetic aqueous wastewater was assessed by applying a commercial TFC (thin film composite) polyamide nanofilter. The effects of pH (6.5-8.5), pressure (4-10 bar), concentration of to...

[ 3 ] - Numerical study on the performance prediction of a proton exchange membrane (PEM) fuel cell

An electrochemical analysis on a single channel PEM fuel cell was carried out by Computational Fuel Cell Dynamics (CFCD). The objective was to assess the latest developments regarding the effects of change in the current collector materials, porosity of electrodes and gas diffusion layer on the fuel cell power density. Graphite, as the most applicable current collector material, was applied fol...

[ 4 ] - Measurement and Prediction of Time-independent and Time-dependent Rheological Behavior of Waxy Crude Oil

Wax deposition phenomenon changes the rheological behavior of waxy crude oil completely. In the current work, the rheological time-dependent and time-independent behaviors of waxy crude oil samples are studied and flow curve and compliance function are measured for the oil samples with various wax contents at different temperatures. A decrease in temperature and an increase in wax content lead ...

[ 5 ] - Temperature proﬁle of a power-law ﬂuid over a moving wall with arbitrary injection/suction and internal heat generation/absorption

The heat transfer for a non-Newtonian power-law fluid over a moving surface is investigated by applying a uniform suction/injection velocity proﬁle. The ﬂow is inﬂuenced by internal heat generation/absorption. The energy equation is solved at constant surface temperature condition. The Merk-Chao series is applied to obtain a set of ODEs instead of a complicated PDE. The converted ordinary diffe...

[ 6 ] - The measurement of droplet size distribution of water-oil emulsion through NMR method

The effects of water/oil volume ratio, type and concentration of demulsifier, water salinity and mixing speed on the average water droplets size in water-oil emulsion are evaluated at different times through NMR measurements.The type and concentration of demulsifier have the greatest effects on the average droplet size with 38% and 31.5%, respectively. The water/oil volume ratio, water salinity...

[ 7 ] - Assessing the Biological Inhibitors Effect on Crude Oil Wax Appearance Temperature Reduction

To assess the effect of micro-organisms on the reduction of wax appearance temperature (WAT) of waxy crude oil, some appropriate strains were obtained from contaminated samples exposed to hydrocarbon compounds for a long time. By conducting some screening tests, four strains were chosen and aerated in a bioreactor; they were then grown in some hydrocarbon environments in order to produce biolog...

[ 8 ] - A Study on the Adsorption and Catalytic Oxidation of Asphaltene onto Nanoparticles

The use of nanoparticles, including metal oxide surfaces, as asphaltene adsorbents is a potential method of removing and/or upgrading asphaltenes. The adsorption of two asphaltene types, extracted from two types of Iranian crude oil, onto nanoparticles (TiO2, SiO2, and Al2O3) are assessed and the thermal behavior of the adsorbed asphaltenes is examined under an oxidizing atmosphere through ther...

[ 9 ] - بررسی آزمایشگاهی عملکرد فرآیند الکتروفنتون در کاهش بار آلودگی فاضلاب کاستیک‌مستعمل پالایشگاه اصفهان

فاضلاب کاستیک مستعمل به دلیل قلیائیت بالا، حضور ترکیبات گوگردی، بار آلودگی بالا و زیست تخریب ناپذیری از مهم‌ترین چالش‌های زیست‌محیطی پالایشگاه‌ها به‌شمار می‌رود. در همین راستا، در این پژوهش مهم‌ترین عوامل فرآیندی تأثیرگذار بر بازده فرآیند اکسیداسیون پیشرفته الکتروفنتون شامل: پی اچ (در گستره 5-2)، نسبت هیدروژن پراکسید به میزان اکسیژن‌خواهی شیمیایی (75/0-2/0= H2O2/COD)، دما (C° 60-20)، زمان واکنش...

[ 10 ] - Investigation on Turbulent Nanofluid Flow in Helical Tube in Tube Heat Exchangers

In this study, the thermal characteristics of turbulent nanofluid flow in a helical tube in the tube heat exchanger (HTTHE) were assessed numerically through computational fluid dynamics (CFD) simulation. The findings of both the turbulent models: realizable k-epsion (k-ε) and re-normalisation group (RNG) k-epsilon were compared. The temperature distribution contours show that realizable and RN...

[ 11 ] - مدل‌سازی مونت‌‌کارلو در پیش بینی دینامیکی توزیع اندازه قطره های تعلیق آب ـ نفت خام

در این مطالعه، مدل سازی روند تغییرهای اندازه قطره هایآب در تعلیقآب ـ نفت خام بر اثر پدیده های انباشتگی و ته‌نشینی به روش مونت‌کارلو انجام شده است. نتیجه ها با داده های تجربی به دست آمده از آزمایش‌های NMR مقایسه شده ...

[ 12 ] - An Experimental Study on Evaluation of Factors Influencing the Viscosity and Viscoelastic Properties of Waxy Crude Oil

The influences of several operating factors on the viscosity of the Isfahan refinery waxy crude oil sample are studied through conducting some rheological shear rotational tests. The Taguchi design method is adopted to determine the impact of factors such as shear rate, temperature, cooling rate, wax content, and asphaltene content on the viscosity of the waxy crude oil. The results show that t...

[ 13 ] - تخریب داروی مترونیدازول از آب‌های آلوده از طریق نانوفوتوکاتالیست تیتانیوم اکسید / آهن اکسید بر پایه زئولیت کلینوپتیلولایت

در این پژوهش نانوفوتوکاتالیست ترکیبی تیتانیم اکسید / آهن اکسید بر پایه زئولیت طبیعی کلینوپتیلولایت به روش هم رسوبی شیمیایی سنتز شد. کاتالیست سنتز شده از طریق آنالیزهای XRD،XRF ، FT-IR و FE-SEM مشخصه‌یابی شد. نتایج XRD و FT-IR حضور نانو ذرات آهن اکسید و تیتانیوم را بر سطح زئولیت تأیید کرد. نتایج FE-SEM ضمن تأیید لایه نشانی تیتانیم اکسید و آهن اکسید بر سطح زئولیت، ابعاد تقریبی ذرات نانوفوتوک