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SDM College of Engineering and Technology

About: SDM College of Engineering and Technology is a(n) based out in . It is known for research contribution in the topic(s): Diesel fuel & Combustion. The organization has 350 authors who have published 351 publication(s) receiving 2399 citation(s).


Papers
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Journal ArticleDOI
Abstract: Energy is an essential requirement for economic and social development of any country. Sky rocketing of petroleum fuel costs in present day has led to growing interest in alternative fuels like vegetable oils, alcoholic fuels, CNG, LPG, Producer gas, biogas in order to provide a suitable substitute to diesel for a compression ignition (CI) engine. The vegetable oils present a very promising alternative fuel to diesel oil since they are renewable, biodegradable and clean burning fuel having similar properties as that of diesel. They offer almost same power output with slightly lower thermal efficiency due to their lower energy content compared to diesel. Utilization of producer gas in CI engine on dual fuel mode provides an effective approach towards conservation of diesel fuel. Gasification involves conversion of solid biomass into combustible gases which completes combustion in a CI engines. Hence the producer gas can act as promising alternative fuel and it has high octane number (100–105) and calorific value (5–6 MJ/Nm 3 ). Because of its simpler structure with low carbon content results in substantial reduction of exhaust emission. Downdraft moving bed gasifier coupled with compression ignition engine are a good choice for moderate quantities of available mass up to 500 kW of electrical power. Hence bio-derived gas and vegetable liquids appear more attractive in view of their friendly environmental nature. Experiments have been conducted on a single cylinder, four-stroke, direct injection, water-cooled CI engine operated in single fuel mode using Honge, Neem and Rice Bran oils. In dual fuel mode combinations of Producer gas and three oils were used at different injection timings and injection pressures. Dual fuel mode of operation resulted in poor performance at all the loads when compared with single fuel mode at all injection timings tested. However, the brake thermal efficiency is improved marginally when the injection timing was advanced. Decreased smoke, NO x emissions and increased CO emissions were observed for dual fuel mode for all the fuel combinations compared to single fuel operation.

107 citations

Journal ArticleDOI
Abstract: The paper discusses the effect of blending hydrogen with diesel in different proportions on combustion and emissions. A comparative study was carried out to analyze the effect of direct injection of hydrogen into the combustion chamber with that of induction through the inlet manifold for dual fueling. Percentage of hydrogen substitution varied from 20% to 80%, simultaneously reducing the diesel percentages. CFD analysis of dual fuel combustion and emissions were carried out for both the said methods using the CFD software FLUENT, meshing the combustion chamber was carried out using GAMBIT. The standard combustion and emission models were used in the analysis. In the second part of the paper, the effect of angle of injection in both the methods of hydrogen admission, on performance, combustion and emissions were analyzed. The experimental results were compared with that of simulated values and a good agreement between them was noticed.

103 citations

Journal ArticleDOI
Abstract: Using a solution technique, sulfonated-poly(vinyl alcohol) membranes were developed as pervaporation membranes by incorporating sulfophthalic acid (SPTA). The physico-chemical properties of the resulting membranes were studied by Fourier transform infrared spectroscopy (FTIR), wide-angle X-ray diffraction (WAXD), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and scanning electron microscopy (SEM). The mechanical properties of the membranes were studied using universal tensile machine (UTM). Membranes were tested for their ability to separate water–isopropanol mixtures by pervaporation in the temperature range of 40–60 °C. The experimental results demonstrated that the membrane containing 15 mass% of SPTA showed the highest separation selectivity of 3452 with a flux of 3.51 × 10 −2 kg/m 2 h at 40 °C for 10 mass% of water in the feed. The total flux and flux of water were found to be almost overlapping for sulfonated-poly(vinyl alcohol) (SPVA) membranes, suggesting that these could be used effectively to separate the water–isopropanol mixtures. From the temperature dependency of diffusion and permeation values, the Arrhenius activation parameters were estimated and discussed in terms of membranes efficiency. The activation energy values obtained for water permeation ( E pw ) were significantly lower than those of isopropanol permeation ( E DIPA ), suggesting that the developed membranes have higher separation efficiency for water–isopropanol system. The negative heat of sorption (Δ H S ) values was obtained for all the membranes, indicating that Langmuir's mode of sorption is predominant in the process.

76 citations

Journal ArticleDOI
Abstract: Using a solution technique, chitosan-wrapped multiwalled carbon nanotubes (CS-wrapped MWCNTs) incorporated sodium alginate (SA) membranes were prepared. After studying the physico-chemical properties of these membranes using Fourier transform infrared spectroscopy (FTIR), wide-angle X-ray diffraction (WAXD), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and scanning electron microscopy (SEM), the membranes were subjected to pervaporation dehydration of isopropanol. The effects of CS-wrapped MWCNTs and feed composition on the pervaporation performance of the membranes were systematically studied. The membrane containing 2 mass% of CS-wrapped MWCNTs exhibited the highest separation selectivity of 6419 with a flux of 21.76×10−2 kg/m2 h at 30 °C for 10 mass% of water in the feed. The total flux and flux of water are found to be almost overlapping each other, manifesting that the developed membranes could be used effectively to break the azeotropic point of water–isopropanol mixtures. From the temperature dependent diffusion and permeation values, the Arrhenius activation parameters were estimated. The activation energy values obtained for water permeation (Epw) are significantly lower than those of isopropanol permeation (EpIPA), suggesting that the developed membranes have higher separation ability for water–isopropanol system. The estimated Ep and ED values were ranged between 14.42 and 10.79, and 14.97 and 11.73 kJ/mol, respectively. The negative heat of sorption (ΔHs) values was obtained for all the membranes, suggesting that Langmuir's mode of sorption is predominant.

74 citations

Book ChapterDOI
01 Jan 2014
TL;DR: This chapter addresses different polymerization methods and techniques employed for the preparation of biopolymers, with the emphasis is on the general properties of bi monopolymers, synthetic protocols, and their biomedical applications.
Abstract: Polymer scientists have made an extensive research in the development of biodegradable polymers, which could find enormous applications in the area of medical science. Today, various biopolymers have been prepared and utilized in different biomedical applications. Despite the apparent proliferation of biopolymers in medical science, the science and technology of biopolymers is still in its early stages of development. Tremendous opportunities exist and will continue to exist for the penetration of biopolymers in every facet of medical science through intensive research and development. Therefore, this chapter addresses different polymerization methods and techniques employed for the preparation of biopolymers. The emphasis is on the general properties of biopolymers, synthetic protocols, and their biomedical applications. In order to make the useful biomedical devices from the polymers to meet the demands of medical science, various processing techniques employed for the development of devices have been discussed. Further, perspectives in this field have been highlighted and conclusions arrived at. The relevant literature was collected from different sources, including Google sites, books, and reviews.

62 citations


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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
20225
202145
202034
201936
201834
201742