Author
C. K. Suraj
Bio: C. K. Suraj is an academic researcher from Indian Institute of Technology Madras. The author has contributed to research in topics: Biodiesel & Diesel fuel. The author has an hindex of 2, co-authored 2 publications receiving 14 citations.
Papers
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03 Jul 2020
TL;DR: In this paper, the effects of variations in free fattens in free-fattens have been explored and compared with the transesterification of vegetable oils and animal fats.
Abstract: Biodiesel is derived from vegetable oils and animal fats by various methods among which transesterification is the most widely used. The present work explores the effects of variations in free fatt...
26 citations
TL;DR: In this article, the macroscopic spray characteristics of fresh and aged Karanja biodiesels are compared with that of diesel, and the results showed that although biodiesel's long-term storage results in variations in physical and chemical properties, there are no significant variations in the macro-scopic spraying characteristics.
Abstract: A significant obstacle to utilize biodiesel fuel for automotive engine applications is its poor oxidative stability. In the present work, oxidation and spray characteristics of Karanja biodiesel stored for one year are studied. The fuel physical properties that influence the spray characteristics, viz. density, kinematic viscosity, and surface tension, are increased by 0.38%, 12.74%, and 3.95%, respectively, after a one-year storage period. The macroscopic spray characteristics of fresh and aged Karanja biodiesels are compared with that of diesel. The spray penetration length, spray cone angle, and the projected spray area are measured at chamber pressures of 20, 30, and 40 bar and injection pressures of 300, 600, and 900 bar. The results showed reduced mass flow rate at lower injection pressures with fresh and aged biodiesels than diesel. At 300 bar injection pressure, spray penetration length is longer with diesel during the initial injection period, but later the spray slows down. There are no appreciable differences in the spray penetration length and the spray cone angle between diesel, fresh, and aged biodiesels at all the injection pressures. The projected spray area is higher for diesel than biodiesels indicating a denser spray with biodiesels. The study concludes that although biodiesel's long-term storage results in variations in physical and chemical properties, there are no significant variations in the macroscopic spray characteristics. Analysis of atomization characteristics of fresh and aged biodiesels also revealed similar results.
15 citations
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01 Apr 2010
TL;DR: In this paper, the effect of temperature on the tribological performance of palm biodiesel was investigated by using four ball wear machine under a normal load of 40kg for 1h at speed 1200rpm.
Abstract: Biodiesel, as an alternative fuel is steadily gaining attention to replace petroleum diesel partially or completely. The tribological performance of biodiesel is crucial for its application in automobiles. In the present study, effect of temperature on the tribological performance of palm biodiesel was investigated by using four ball wear machine. Tests were conducted at temperatures 30, 45, 60 and 75°C, under a normal load of 40kg for 1h at speed 1200rpm. For each temperature, the tribological properties of petroleum diesel (B0) and three biodiesel blends like B10, B20, B50 were investigated and compared. During the wear test, frictional torque was recorded on line. Wear scars in tested ball were investigated by optical microscopy. Results show that friction and wear increase with increasing temperature.
148 citations
TL;DR: In this article, the components of Terminalia chebula plant such as leaves and seeds are effectively utilized as a green source for the synthesis of copper oxide nanoparticles (CuO NPs) and production of biodiesel, respectively.
25 citations
TL;DR: In this paper, a multi-linear regression model was proposed to predict the density, kinematic viscosity and surface tension of biodiesel, which is based on the straight chain saturation factor and modified degree of unsaturation.
23 citations
TL;DR: In this paper, the efficacy of utilizing emulsification and water injection methods to mitigate the higher NOx emissions with biodiesel is investigated in the light-duty diesel engine at rated speed, varying load conditions with neat biodiesel, biodiesel-water emulsion, and biodiesel water injection.
19 citations
TL;DR: In this article, the macroscopic spray characteristics of fresh and aged Karanja biodiesels are compared with that of diesel, and the results showed that although biodiesel's long-term storage results in variations in physical and chemical properties, there are no significant variations in the macro-scopic spraying characteristics.
Abstract: A significant obstacle to utilize biodiesel fuel for automotive engine applications is its poor oxidative stability. In the present work, oxidation and spray characteristics of Karanja biodiesel stored for one year are studied. The fuel physical properties that influence the spray characteristics, viz. density, kinematic viscosity, and surface tension, are increased by 0.38%, 12.74%, and 3.95%, respectively, after a one-year storage period. The macroscopic spray characteristics of fresh and aged Karanja biodiesels are compared with that of diesel. The spray penetration length, spray cone angle, and the projected spray area are measured at chamber pressures of 20, 30, and 40 bar and injection pressures of 300, 600, and 900 bar. The results showed reduced mass flow rate at lower injection pressures with fresh and aged biodiesels than diesel. At 300 bar injection pressure, spray penetration length is longer with diesel during the initial injection period, but later the spray slows down. There are no appreciable differences in the spray penetration length and the spray cone angle between diesel, fresh, and aged biodiesels at all the injection pressures. The projected spray area is higher for diesel than biodiesels indicating a denser spray with biodiesels. The study concludes that although biodiesel's long-term storage results in variations in physical and chemical properties, there are no significant variations in the macroscopic spray characteristics. Analysis of atomization characteristics of fresh and aged biodiesels also revealed similar results.
15 citations