The Centre for Advanced Studies and Research in Automotive Engineering has always had a rich culture of contributing to the scientific community in form of research publications in highly prestigious academic journals. This has led to a staggering amount of publications by the members of the Centre, the number of which, currently stands at 104.

The past few publications in the year 2019 have come in the form of the following:

Hydroprocessed vegetable oil as a fuel for transportation sector: A review by Ankit Sonthalia and Dr. Naveen Kumar

(Journal of the Energy Institute, Volume 92, Issue 1, 2019)
(Publisher: Elsevier; SCI indexed)

Renewable fuels produced from vegetable oils are an attractive alternative to fossil-based fuel. Different type of fuels can be derived from these triglycerides. One of them is biodiesel which is a mono alkyl ester of the vegetable oil. The biodiesel is produced by transesterification of the oil with an alcohol in the presence of a catalyst. Another kind of fuel (which is similar to petroleum-derived diesel) can be produced from the vegetable oil using hydroprocessing technique. This method uses elevated temperature and pressure along with a catalyst to produce a fuel termed as ‘renewable diesel’. The fuel produced has properties that are beneficial for the engine as well as the environment. It has high cetane number, low density, excellent cold flow properties and same materials can be used as are used for engine running on petrodiesel. It can effectively reduce NOx, PM, HC, CO emissions and unregulated emissions as well as greenhouse gases as compared to diesel. The fuel is also beneficial for the after-treatment systems. Trials in the field have shown that the volumetric fuel consumption of renewable diesel is higher than petrodiesel and nearly proportional to the volumetric heating value. The present review focuses on the hydroprocessing technique used for the renewable diesel production and the effect of different parameters such as catalyst, reaction temperature, hydrogen pressure, liquid hourly space velocity (LHSV) and H2/oil ratio on oil conversion, diesel selectivity, and isomerization. The review also summarizes the effect; renewable diesel has on combustion, performance, and emission characteristics of a compression ignition engine.

Influence of nanoadditives on Ignition characterisitics of Kusum (Schleichera oleosa) biodiesel
by Dr. Naveen Kumar, Mukul Tomar

(International Journal of Energy Research)
(Publisher: Wiley; SCI indexed)

Biodiesel obtained from inedible sources emerged as a productive approach in Indian energy scenario due to the scarcity of food resources come up with extensive usage of edible crops. Kusum (Schleichera oleosa) oil is abundantly available in India and can be used as feedstock to produce biodiesel. However, issues such as higher viscosity, poor stability, and lower calorific value result in poor ignition characteristics, hence limiting its use in combustion applications. An improvement in performance and emission characteristics can be achieved by doping nanoparticles in Kusum biodiesel (KBD). The present work examines the impact of a metal compound and carbon‐primarily based nanoparticles on the evaporation time and ignition probability of the KBD. During the experimental process, different fuel samples of KBD were prepared by amalgamating nanoparticles; then, a sequence of hot plate (stainless steel) ignition test was conducted on these test fuels. The comparative assessment of neat biodiesel and the biodiesel fuel doped with 30 ppm each of alumina (Al2O3), and multiwalled carbon nanotubes (MWCNTs) nanoparticles were carried out. The Kusum oil was converted to biodiesel using two‐stage transesterification process. In the initial stage, refined oil was gone through the acid catalyst esterification process followed by the transesterification reaction. The prepared methyl ester was confirmed and characterized using GC‐MS technique. The thermophysical and spray properties of the test fuels including density, viscosity, calorific value, cloud/pour point, Sauter mean diameter (SMD), and specific surface area (SSA) were also calculated. The experimental result showed a significant increase in ignition probability and heat conduction properties due to improved surface area/volume ratio. Also, lower evaporation time was noted for metal/carbon‐based nanoparticles doped biodiesel as compared with neat biodiesel.

Performance and Emission studies of ternary fuel blends of diesel, biodiesel and octanol

by Dr. Naveen Kumar, Sidharth

(Energy sources, Part A: Recovery, Utilization and Environmental Effects)
(Publisher: Taylor & Francis; SCI indexed)

Diesel engines are very popular prime movers, however, they are also a major producer of environmental pollution. Ternary fuel blends of diesel, biodiesel, and octanol can be a suitable solution to the problem. In the present work, different ternary fuel blends were formulated and used in a diesel engine. Brake thermal efficiency and brake specific energy consumption of the blend containing 10% octanol, 10% biodiesel, and 80% diesel were found better than diesel owing to more oxygen content and comparable properties. Moreover, lower emissions (carbon monoxide, unburnt hydrocarbon, nitrogen oxide, and smoke opacity) and better combustion of the blends was observed.