All articles
109 articles
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Analysis of Vapour-Liquid Equilibrium Behaviour of Cryogenic Hydrogen-Deuterium Mixtures Using Cubic Equation of State-based Method
Abstract: A comparative analysis of the vapour liquid equilibrium behaviour of the cryogenic hydrogen-deuterium system calculated under the assumption of an ideal solution using pure component vapour pressure data versus that of a real solution using Peng-Robinson cubic equation of state has been presented in this work. It is found that assumption of ideal solution leads to over prediction of the relative volatilities by 14% to 57% depending on the mixture …
Published in International Journal of Chemical Separation Technology · Vol. 4, Issue 2, 2018 · pp. 1–13 Read article
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FEASIBILITY STUDIES ON A DISTILLATION CASCADE FOR PRODUCTION OF ULTRA-HIGH PURITY TRICHLOROSILANE
Abstract: Elemental silicon is the backbone of the electronics and the solar photovoltaics industry in the present times. This work examines the purification of a silicon precursor such that the total impurity content in it is limited to a few parts per million. Trichlorosilane (TCS) is one of the most important precursors in the production of electronics grade elemental silicon. This is because of the relative ease with which crude trichlorosilane, …
Published in International Journal of Chemical Separation Technology · Vol. 4, Issue 1, 2018 · pp. 19–35 Read article
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Rheological Study of Waste Polyethylene Terephthalate with Bitumen Mix in Pavement Construction
Abstract: Plastic bags which are composed of polyethylene terephthalate (PET) is commonly used as for soft drink, water bottles and many other applications. However, disposal of this waste PET in large quantities constitutes an environmental problem, as it is considered as non-biodegradable materials. This study investigated rheological study of waste PET to be mixed with bitumen use as a raw material for pavement construction. The effect of temperature was varied from …
Published in International Journal of Chemical Separation Technology · Vol. 4, Issue 1, 2018 · pp. 36–48 Read article
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Classification of Microvalves ---- A Review
Abstract: Miniaturization of microvalves is required in many microfluidic applications towards the commercial standards. As examples, the applications of microvalves are flow regulation and on/off switching. Microvalves are primarily divided into active microvalves and passive microvalves according to their working principles. These microvalves may be involved with mechanical systems, non-mechanical systems and external systems. This educational short review is authored as the study material for proposed elective-course on Microfluidics (M.Tech, Theory) …
Published in International Journal of Chemical Separation Technology · Vol. 4, Issue 1, 2018 · pp. 16–18 Read article
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Passive Capillary Flow of Dyed Water in SU-8 based Glass Microfluidic Devices integrated with Polyimide Layer on the Bottom Wall
Abstract: In this work, total 4 individual SU-8 based glass microfluidic devices are fabricated by the maskless lithography and indirect bonding technique. The polyimide layer is integrated on the selected portion of glass bottom wall of each device. Each passive capillary flow of dyed water is recorded by a CMOS camera catching 25 frames per second. This work will be useful to fabricate the SU-8 based laboratory-on-a-chip systems for microfluidic applications. …
Published in International Journal of Chemical Separation Technology · Vol. 4, Issue 1, 2018 · pp. 13–15 Read article
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Extractive Distillation study for the system Acetone - Chloroform – DMSO
Abstract: Acetone- chloroform is a maximum boiling azeotropic mixture which is frequently observed in the pharmaceutical and specialty chemicals industries. Conventional distillation does not yield the desired separation into pure components that is Acetone and Chloroform. Present work, focuses on separation of mixture by Extractive Distillation (ED) using PRO/II simulation software. Solvent used in separation of the mixture is DMSO (Di Methyl Sulfoxide) and thermodynamic model UNIFAC is selected for the …
Published in International Journal of Chemical Separation Technology · Vol. 4, Issue 1, 2018 · pp. 1–12 Read article
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A Review Status on Application of Separation Techniques in Daily Life
Abstract: In chemistry and related fields, a unit operation is the basic step in a process. Unit operations involve a physical change or chemical transformation such as separation, crystallization, evaporation, filtration, polymerization, isomerization, and other reactions. Researchers have developed economic ways of using materials and energy. Chemical engineers use chemistry and engineering to turn raw materials into usable products, such as medicine, petrochemicals and plastics on a large-scale industrial setting. They …
Published in International Journal of Chemical Separation Technology · Vol. 3, Issue 2, 2017 · pp. 30–35 Read article
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Hydrogenation of dimethyl-nitrobenzene to dimethyl-aniline in a three-phase Reactor
Abstract: The liquid-phase catalytic hydrogenation of dimethyl-nitrobenzene (DN) to Dimethyl-aniline (DA) was carried out in ethanol using 5% Pd/C as a catalyst. The effects of hydrogen partial pressure (400–1000 kPa), reaction temperature (343–403 ), catalyst loading (5–15 g/lit), speed of stirring range (200-800 rpm) and dimethyl-nitrobenzene concentration (0.12–0.75 mol/lit) on the hydrogenation of dimethyl-nitrobenzene and the yield of Dimethyl-aniline have been studied. Dimethyl-aniline was the only reaction product, generated through the …
Published in International Journal of Chemical Separation Technology · Vol. 3, Issue 2, 2017 · pp. 1–13 Read article
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High Performance Liquid Chromatography - A Separation Technique in Chemical Analysis
Abstract: High-performance liquid chromatography (HPLC) is a chromatographic technique used to split a mixture of compounds in the fields of analytical chemistry, biochemistry and industrial. The main purposes for using HPLC are for identifying, quantifying and purifying the individual components of the mixture. High-performance liquid chromatography or high-pressure liquid chromatography (HPLC) is a chromatographic method that is used to separate a mixture of compounds in analytical chemistry and biochemistry so as …
Published in International Journal of Chemical Separation Technology · Vol. 3, Issue 2, 2017 · pp. 14–17 Read article
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Chemical Separations to Transform the Domain
Abstract: The chemical industry includes producers of industrial gases, large-volume commodity chemicals and polymers, chemical products for agricultural and medicinal uses, and performance-targeted chemical and polymer specialties. The industry produces more than 70,000 products, including raw and basic materials, intermediate materials, and finished products. The chemical industry obtains raw materials from the petroleum refining, natural gas, and mining industries, as well as from biological sources. Air emissions included 4.3 million metric …
Published in International Journal of Chemical Separation Technology · Vol. 3, Issue 2, 2017 · pp. 24–29 Read article
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A Potential Application of Nanofiltration Technology in Chemical Industry
Abstract: The upsurge in energy costs and the demands for products with larger nutritional value and of processing ways less toxic to the environment are eye-catching factors for transferring membrane processing to food industries. Nanofiltration (NF) technology is still progressing, finding more and more uses in food processing and seems as a vital alternative to conventional methods. The purpose of this review is to present the recent development and future potential …
Published in International Journal of Chemical Separation Technology · Vol. 3, Issue 2, 2017 · pp. 18–23 Read article
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SDS-PAGE Electrophoresis for Protein Separation – An Overview
Abstract: Polyacrylamide gel electrophoresis (PAGE) is a critical method useful for separating components of a protein mixture depending on their size. The procedure depends on the principle that a charged particle will migrate in an electric field towards a cathode with inverse sign. The general electrophoresis procedures cannot be utilized to determine the molecular weight of organic particles in light of the fact that the versatility of a substance in the …
Published in International Journal of Chemical Separation Technology · Vol. 3, Issue 1, 2017 · pp. 29–38 Read article
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Separation Technology – A Boon for the Chemical Process Industry
Abstract: The main role of chemical engineers is to design and troubleshoot processes for the production of chemicals, fuels, foods, pharmaceuticals, and biological, just to name a few. They are most often employed by large-scale manufacturing plants to maximize productivity and product quality while minimizing costs. In a scientific sense, a chemical process is a method or means of somehow changing one or more chemicals or chemical compounds. Such a chemical …
Published in International Journal of Chemical Separation Technology · Vol. 3, Issue 1, 2017 · pp. 39–45 Read article
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Determination of % recovery of the solute using Batch Leaching
Abstract: The aim of this study was to investigate the dissolution kinetics of salt in water in a mechanical agitation system and to precipitate salt using water at various conditions. Amount of Sand, Water and Salt were selected as parameters. It was observed that increase in the Salt content and decrease in the salt/sand ratio causes an increase the dissolution rate of salt. The dissolution extent is highly increased with increase …
Published in International Journal of Chemical Separation Technology · Vol. 3, Issue 1, 2017 · pp. 15–23 Read article
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An Innovative Approach to Improve Cleaning Efficiency of Filter Cake in Gas & Oil Drilling Wells
Abstract: Drilling fluids are the complex fluids used for the drilling of oil and gas wells. The effective completion of an oil and gas well and invention of hydrocarbons from the oil and gas reservoir depends to a significant extent on the properties of drilling fluids selected during drilling operations. Filter cake stick provisionally until it is removed by dissolvers at the last stage of the well drilling. Theoretically the filter …
Published in International Journal of Chemical Separation Technology · Vol. 3, Issue 1, 2017 · pp. 24–28 Read article
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Radiation and Chemical Reaction Effect on MHD Flow Past an Accelerated Isothermal Inclined Plate in a Rotating Fluid with Variable Mass Diffusion
Abstract: In this paper, we present radiation, chemical reaction and rotation effects on unsteady MHD flow past an accelerated isothermal inclined plate with variable mass diffusion. The non-dimensional governing equations are solved using Laplace transform method. The velocity, temperature and concentration profiles are discussed for various physical parameters like, radiation parameter, chemical reaction parameter, rotation parameter, Prandtl number, Schmidt number and time. Finally, physical quantities such as Nusselt number and Sherwood …
Published in International Journal of Chemical Separation Technology · Vol. 3, Issue 1, 2017 · pp. 1–14 Read article
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Enhancement of Heat Transfer Coefficient in Shell and Tube Heat Exchanger Using 1-Butyl-3-Methylimidzaolium Bromide
Abstract: Improvement in heat transfer coefficient in heat exchanger plays very important energy saving role in the industries. In this study the effect of ionic liquid on HT coefficient was studied using a lab scale shell and tube heat exchanger (length-39 cm, shell diameter 9 cm, Tube diameter 0.62 cm). Also the effect of cold and hot flow rate on heat transfer coefficient, Effect of mass concentration of ionic liquid was …
Published in International Journal of Chemical Separation Technology · Vol. 2, Issue 1, 2016 · pp. 11–18 Read article
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Lantana camara Leaves: An Important Source of Allelochemicals
Abstract: Allelopathy may provide alternatives to synthetic herbicides for weed control. Allelopathy is a unique, natural and an environment-friendly technique that may be used for weed control. Lantana camara has allelopathic properties which effect in the germination and growth of surrounding plants. The aqueous leaf extract of L. camara was found to have inhibitory effect on germination of Parthenium hysterophorus. The results indicated that the inhibitory effect was much more pronounced …
Published in International Journal of Chemical Separation Technology · Vol. 1, Issue 2, 2015 · pp. 5–9 Read article
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Evaluation of Humic Acid Content and Zinc Levels in Soil, Olive Fruit and Leaf Samples in Edremit Bay
Abstract: Edremit Bay is located on west coast of Turkey and region’s economy mainly relies on olive products. In this study, Zn(II) content of soil, olive fruit and olive leaf samples obtained from Burhaniye and Küçükkuyu in Edremit Bay were analyzed. Additionally, humic acid contents of soil samples were determined and compared with a commercial fertilizer additive. Determination of Zn(II) in mineralized samples were achieved using flame atomic absorption spectrometer. The …
Published in International Journal of Chemical Separation Technology · Vol. 1, Issue 1, 2015 · pp. 1–7 Read article
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Methods of Separation: A Guide to Beginners
Abstract: Learning different separation methods is important in chemical and biochemical world. Different techniques are known that helps to separate complex mixtures of substances. Herewith, we provide a brief overview of these methods which can be helpful for the students that are in the beginning of their learning stage of chemical separation methods and techniques.
Published in International Journal of Chemical Separation Technology · Vol. 2, Issue 2, 2016 · pp. 44–46 Read article