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806 articles for “TEM”
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A study of mesomorphic properties of Rod shaped 1, 2, 4-triazine integrated imine compounds
Abstract: Synthesis of typical rod-like liquid crystals has a great interest in numerous applications. The model has a terminal chain attached to only one end of the central rigid core. At the other end of the rigid core is a functional group that can be either polar or nonpolar. There are three kinds of rod-like liquid crystal, in this segment applies specifically to materials with template designs. Generally, terminal groups which …
Published in International Journal of Chemical Synthesis and Chemical Reactions · Vol. 8, Issue 2, 2022 · pp. 16–25 Read article
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Deciphering Foam: Exploring Antifoaming Agents and Their Mechanism
Abstract: Antifoaming agents are critical additives employed in industrial processes to counter foam formation, which can hinder efficiency and cause equipment damage. These agents, available in various formulations like silicone-based, mineral oil-based, and polyethylene glycol-based, are selected based on specific foam properties and operating conditions. Choosing the right antifoam agent is crucial, with silicone-based ones often preferred for their stability and effectiveness across different pH levels and temperatures. Conversely, mineral oil-based …
Published in International Journal of Chemical Synthesis and Chemical Reactions · Vol. 9, Issue 2, 2023 · pp. 32–36 Read article
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Development of Empirical Relationships Between Input and Output Parameters of Sponge Iron Process Using Neural Network
Abstract: In the present study, estimation of optimum input parameters corresponding to desired output parameters is carried out for a typical sponge iron process. For this purpose data of rotary kiln of the process are collected. It includes temperatures profiles inside the rotary kiln and flow rates of air, iron ore, feed coal, slinger coal and sponge iron. These data are analysed using ANN and group method of data handling (GMDH) …
Published in International Journal of Renewable Energy and its Commercialization · Vol. 1, Issue 2, 2015 · pp. 6–19 Read article
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Investigation on Stability Analysis of Polanga oil Methyl Ester
Abstract: Biodiesel is a renewable alternative fuel and consists of mono-alkyl esters of the fatty acids. One of the major technical problems associated with the biodiesel is its storage stability and susceptibility to oxidation because of its chemical nature. This nature of the biodiesel is due to unsaturated fatty acid chains in its molecular structure. Also, the presence of the double bond in the molecule of the biodiesel produces a high …
Published in International Journal of Renewable Energy and its Commercialization · Vol. 2, Issue 1, 2016 · pp. 16–23 Read article
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Extraction of Furfural (C5H4O2) from Waste Bagasse of Agricultural Source
Abstract: Furfural is an important liquid organic chemical having yellow oily nature with smell of almonds manufactured from Agro industrial wastes & residues containing carbohydrates known as pentosans and is used in refining of lubricating oils, petroleum, and diesel fuel. The raw material for the production of furfural was bagasse and chemicals such as H2SO4, water and NaCl. Bagasse is a waste product from sugar industry which is good source of …
Published in International Journal of Renewable Energy and its Commercialization · Vol. 5, Issue 1, 2019 · pp. 47–57 Read article
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Experimental Investigation on Performance of Solar Air Heaters With Thermal Storage
Abstract: Solar air heaters are used for applications at low and moderate temperatures such as; crop drying, timber seasoning, and space heating. The present research focused on a forced convection flat plate solar air heater with heat storage system under the climatic conditions of India – Mangalore for hot summer days of April 2015. In this work, attempt has been made to draw a comparison between the collector efficiencies for flat …
Published in International Journal of Renewable Energy and its Commercialization · Vol. 5, Issue 1, 2019 · pp. 37–46 Read article
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Concentrating cylindrical-parabolic solar collectors with thermo-electric generators for electricity production – viability assessment in India
Abstract: The use of concentrating solar collectors for converting solar insolation into thermal energy, followed by conversion of thermal energy to electricity via low to medium temperature thermoelectric generators at a particular location in India has been explored in this work. This may be considered a different route to obtaining solar heat and electricity apart from the more usual and direct solar photovoltaic conversion. Even though such a scheme may not …
Published in International Journal of Renewable Energy and its Commercialization · Vol. 5, Issue 2, 2019 · pp. 6–17 Read article
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CFD-subset-FVM-based MATLAB-simulation of Heat Transfer in High Grade Cold Storage Augmenting Cryogenic Energy Storage System by Circulating Natural Gas as Working Fluid : Conceptual Review
Abstract: Abstract. Cryogenic Energy Storage (CES) improves power grid with renewable intermittent power sources. In CES, off-peak excess electricity liquefies air or natural gas. Cryogen is stored in large dewar tanks for long periods of time. Whenever electricity need is in peak, work is recovered from cryogen by a power cycle using waste heat. Many researchers focus on liquid air energy storage (LAES). But, natural gas is promising working fluid for …
Published in International Journal of Renewable Energy and its Commercialization · Vol. 5, Issue 2, 2019 · pp. 1–5 Read article
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Comparative Study on Production and Characterization of Bioethanol from Agricultural Waste Materials
Abstract: Production and characterization of bioethanol from lignocellulosic substrates that include sugarcane bagasse, corn cob and cassava peels were investigated in this research study. The raw materials (sugarcane bagasse, corn cob and cassava peels) were sorted, washed, cleansed to remove dirts and dried to remove moisture contents, and crushed into ground form to increase substrate’s surface area of contacts and sieved through a mesh size of 2 mm. The bioethanol distillates …
Published in International Journal of Renewable Energy and its Commercialization · Vol. 8, Issue 2, 2022 · pp. 1–9 Read article
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A Review Of Gas Turbine Air Craft Engines
Abstract: Modern Airplanes now routinely use gas turbine engines as their propulsion technology. This research offers a thorough review of the variables influencing the performance analysis of gas turbine aircraft engines. The fundamentals of how gas turbine engines work as well as the variables that impact their efficiency, such as air pressure, humidity, and temperature. The components of gas turbine engines include the compressor, combustor, and turbine,. The techniques for assessing …
Published in International Journal of Renewable Energy and its Commercialization · Vol. 9, Issue 2, 2023 · pp. 22–27 Read article
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Kinetics and Mechanism of Ruthenium(III) Catalysed Oxidation of L-Arginine by Periodate in Alkaline Medium
Abstract: The kinetics of the ruthenium(III) catalysed oxidation of L-arginine by periodate was studied spectrophotometrically in alkaline medium at 280 nm and at a temperature 35 ± 0.1°C. It was found that the reaction is first order with respect to [catalyst] and [periodate]. The reaction showed fractional order dependence on [substrate] and [alkali]. The oxidation product of the reaction was found to be aldehyde. The anionic species of arginine (Arg) is …
Published in International journal of Thermodynamics and Chemical Kinetics · Vol. 2, Issue 1, 2016 · pp. 12–20 Read article
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Thermodynamic Analysis of an Adsorption Refrigeration System
Abstract: In this paper, thermodynamics analysis of an adsorption refrigeration pair (activated carbon and methanol) at adsorption equilibrium conditions has been proposed. Similar analyses have been done by different scientists for different combinations of adsorbent-adsorbate pairs. Adsorption refrigeration processes normally occurs in physical adsorption condition and activated carbon molecules being nonpolar in nature, micropores approach of adsorption (Polanyi’s micropores theory and D-A equation) has been followed here. Analysis of the adsorption …
Published in International journal of Thermodynamics and Chemical Kinetics · Vol. 1, Issue 1, 2015 · pp. 1–9 Read article
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Review Insight – Thermochemistry
Abstract: A thermodynamic system is the material and radiative substance of a plainly visible volume in space, which can be sufficiently portrayed by thermodynamic state variables, for example, temperature, entropy, interior vitality and weight .
Published in International journal of Thermodynamics and Chemical Kinetics · Vol. 1, Issue 2, 2015 · pp. 12–15 Read article
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A Dynamic Role of Thermodynamics Chemistry in Refrigeration and Air Conditioner Devices
Abstract: Thermodynamics plays a very crucial role in our daily life. Almost all the activities that we do or observe are all based on the principles of thermodynamics. Here, some of the common routine activities of refrigeration and air conditioners are brought into limelight that is explained by the phenomenon of thermodynamics. Thermodynamics is a branch of physics concerned with heat and temperature and their relation to energy and work. It …
Published in International journal of Thermodynamics and Chemical Kinetics · Vol. 3, Issue 1, 2017 · pp. 19–25 Read article
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Second Law of Thermodynamics in Automobile Engines and Aerospace Vehicles
Abstract: Thermodynamics is a core part of science. Nearly all scientists should have a basic knowledge of thermodynamics. The second law of thermodynamics is considered to be the most fundamental law of science. It explains not only the working of engines, refrigerators and other equipment’s used in our daily life, but also highly advanced theories like big bang, expansion of universe, heat death, etc. Thermodynamics is the study of relationship between …
Published in International journal of Thermodynamics and Chemical Kinetics · Vol. 3, Issue 1, 2017 · pp. 26–29 Read article
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Thermodynamic Chemistry in Dyeing of Wool: A Study on Thermodynamics Chemistry of Dyeing of Wool Products
Abstract: Dyes are synthetic aromatic compounds which can bring bright and fixed color to other materials. It is described that over 100,000 commercially accessible dyes occur and more than 7x105 metric tons of dyes are produced universal annually. When a textile fiber is dipped in a solution of dye under favorable conditions, the fiber becomes colored, the color of the solution decreases and dyeing has occurred. The wool fiber is hair …
Published in International journal of Thermodynamics and Chemical Kinetics · Vol. 3, Issue 2, 2017 · pp. 21–26 Read article
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Thermodynamic Techniques in Food Chemistry – A Review
Abstract: The thermal activities of food strongly depend on its composition. The aims of food processing are to inactivate spoilage and pathogenic microorganisms and to sustain this condition in storage. Using calorimetric techniques, many physicochemical effects can be detected in the temperature range between -50°C and 300°C. Biophysical techniques viz., isothermal titration (ITC) and Differential Scanning Calorimetry (DSC) are used to characterize the structure and properties of food materials before and …
Published in International journal of Thermodynamics and Chemical Kinetics · Vol. 3, Issue 2, 2017 · pp. 1–6 Read article
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Modeling of CSTR Reactor for Sodium Benzoate Production
Abstract: The mathematical model was developed for Continuous Stirred-Tank Reactor (CSTR) for the production of sodium benzoate from the reaction of sodium hydroxide and benzoic acid. The performance equation for the operation of CSTR was developed for the analysis of the reactor’s functional dimensions and parameters. The analysis of the reactor’s functional parameters was performed at molar ratio of benzoic acid to sodium hydroxide of 1.5 to 3.0 at intervals of …
Published in International journal of Thermodynamics and Chemical Kinetics · Vol. 4, Issue 1, 2018 · pp. 38–50 Read article
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Review of Reactive Extraction Process for Recovery of Pyruvic Acid
Abstract: Pyruvic acid having a molecular formula (C3H4O3) is an important alpha-keto-carboxylic acid. It is mainly manufactured by biotechnological routes or chemical synthesis. There are number of applications of pyruvic acid in the industrial sector such as chemical, food, cosmetic and agriculture sector. The main problem for the production of pyruvic acid from the fermentation broth is downstream processing. The number of techniques developed to recover this acid from their aqueous …
Published in International journal of Thermodynamics and Chemical Kinetics · Vol. 4, Issue 2, 2018 · pp. 1–7 Read article
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Novel method for determination of kinetic constants from dynamics in a batch reactor with constant heat input rate
Abstract: In this article a novel method of obtaining reaction kinetic constants is described. It consists of measuring both concentration and temperature dynamics in a batch reactor supplied with a constant heat input rate. A system of esterification reaction between acetic acid and methanol in the presence of a cationic resin catalyst is studied. This reversible reaction’s rate is modeled by molecular order and as pseudo homogeneous assumption. By just one …
Published in International journal of Thermodynamics and Chemical Kinetics · Vol. 5, Issue 1, 2019 · pp. 19–23 Read article