A pinboard by
Santhosh Poojary

PhD Scholar, NMAM Institute of Technology-Nitte, Karnataka-India


Sustainable Biodiesel Production from Indigenous Feedstocks

For the past few years, the underutilized and indigenous non edible oil sources have gained much attention for production of biodiesel to avoid food verses fuel issue. Few literature is available on hybrid (mixed) biodiesel blends with diesel and biodiesel produced from indigenous non-edible oils gains importance from the future Indian perspective. Therefore, in my present research, the biodiesel was produced from the locally available non-edible oil feedstocks and the engine performance studies of individual and hybrid-biodiesels blends with petro-diesel was investigated.

The waste cooking oil and non edible oil extracted from seeds of tree species Pongamia pinnata, Scleropyrum pentandrum, Calophyllum inophyllum and Hevea brasiliensis were used for biodiesel production. The Pongamia seed oil based biodiesel and waste cooking oil biodiesel were produced in pilot scale reactor (50L capacity) and Scleropyrum, Calophyllum and Hevea seed oil biodiesels were synthesized in lab scale batch reactor (2L capacity). The various physico-chemical properties of oil and fuel properties of resulting biodiesels were studied for all oil sources and reported. In order to obtain better biodiesel yield, the critical biodiesel production process parameters were optimized by various methods. Finally, a novel generalized biodiesel production protocol was proposed and experimentally evaluated.

The hybrid blending of resulting biodiesels with the pilot scale biodiesels and the evaluation of effect of usual and hybrid blend biodiesels on performance, combustion and emission characteristics of compression ignition engine was carried out. The desired fatty acid esters composition by hybrid blending of different biodiesels was found to be the best strategies to efficiently utilize biodiesel in compression ignition engine in the near future.

Overall it was found that the renewable biodiesel can be produced from indigenous feedstocks even in domestic settings for in-house consumption and lower percentage (up to 20%) of hybrid biodiesel blends with complemented fuel properties can be utilized in existing engines along with usual biodiesel blends without any engine performance problems.