Browsing by Author "Viswanathan, V."

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Effect of fuel injection strategies and EGR on biodiesel blend in a CRDI engine
(Elsevier Ltd, 2019) Bhowmick, P.; Jeevanantham, A.K.; Bragadeshwaran, B.; Kasianantham, K.; Arumuga Perumal, D.A.; Viswanathan, V.; Vora, K.C.; Jain, A.
Biodiesel appears as a replenishable and sustainable energy source and can be used a direct replacement to petro-diesel without any major transformations in ongoing diesel engines. This work concentrates on production of Calophyllum Inophyllum biodiesel (CIB) and preparing 10% blend (CIB10) sample to investigate the effects of varying the injection strategies and exhaust gas recirculation (EGR) in common-rail direct injection engine. The experimental results shows that 10% of pilot fuel and 90% main injection strategy (B10@P10-M90) is superior among all others injection strategies with respect to pure diesel. B10@P10-M90 fuel injection strategy produces the maximum efficiency of 35.8% and lowest fuel consumption of 0.25 kg/kWh compared to all the injection strategies. The carbon monoxide (CO) and hydrocarbon (HC) emissions are also found to be quite low compared to all the other test samples including pure diesel. However B10@P10-M90 results in higher average oxides of nitrogen (NOx) emission which is 18.9% higher in contrast to conventional diesel at full load condition. With the implementation of 10% and 20% EGR with B10@P10-M90, the average NOx emissions decreased by 14.4% and 27.6% respectively compared to B10@P10-M90 without any EGR without significant loss in the performance of the existing diesel engine. © 2019 Elsevier Ltd
Facile in-situ single step chemical synthesis of reduced graphene oxide-copper oxide-polyaniline nanocomposite and its electrochemical performance for supercapacitor application
(Elsevier Ltd, 2017) Viswanathan, V.; Nityananda Shetty, A.
Reduced graphene oxide (rGO)-copper oxide-polyaniline nanocomposites were synthesized by facile in-situ single step synthesis method with different weight ratio of polyaniline at fixed weight ratios of copper oxide and reduced graphene oxide (rGO); and characterized by IR spectroscopy, powder XRD, scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The electrochemical performances of as synthesized composites were studied using two electrode system in 2 M Na2SO4 as electrolyte by cyclic voltammetry (CV), galvanostatic charge/discharge (GCD) and electrochemical impedance spectroscopy (EIS) techniques. The composite with a weight of 300 mg of Polyaniline (PANI), corresponding to the composition (wt %) of rGO6.6%: Cu2O/CuO13.40%: PANI80% (GCP-300) exhibited superior electrochemical characteristics with specific capacitance of 213.20 F g?1, energy density of 18.95 W h kg?1, power density of 545.79 W kg?1, columbic efficiency of 91% and rendered 97.6% of retention of its initial capacitance up to 5000 charge-discharge cycles. The performance is superior to those of binary combinations of constituent materials viz., reduced graphene oxide (rGO), copper oxide and polyaniline, which is attributed to the extent of integration of afore mentioned materials. © 2017 Elsevier Ltd
Synthesis and characterization of reduced- graphene oxide/ nickel oxide/ polyaniline ternary nanocomposites for supercapacitors.
(Elsevier Ltd, 2018) Viswanathan, V.; Nityananda Shetty, A.
Reduced graphene oxide, polyaniline and nickel oxide ternary nanocomposites were synthesized in series by changing the weight ratio of polyaniline adopting in-situ single step chemical method. Their structural characterization was carried out, employing, powder-XRD, IR spectroscopy, and scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDX) techniques. Thus synthesized composites were tested for their electrode property by cyclic voltammetry (CV), galvanostatic charge discharge and electrochemical impedance spectroscopy (EIS) with two electrode system using 6 M KOH as electrolyte at different weight ratio of polyaniline. Of all composites synthesized the one with polyaniline weight of 100 mg rendered the maximum capacitance of about 153.37 F g-1 with corresponding energy and power densities of 13.63 W h kg-1 and 392.54 W Kg-1,respectively. It exhibited 100% retention of its initial capacitance up to 10000 charge - discharge cycles. The obtained performance is superior to the binary combination of constituent materials, namely, reduced graphene oxide, polyaniline and nickel oxide. Â© 2018 Elsevier Ltd.