Thermal, catalytic and co-conversion of non-edible oil seeds to pyrolytic oil

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The most available non-edible seeds in India such as Mahua (Madhuca indica), Karanja (Pongamia pinnata) and Niger (Hyoscyamus Niger L.) were selected as the feedstock for the production of bio-oil through thermos-chemical conversion method of pyrolysis. Prior to pyrolysis the feed materials were characterized to study their suitability and then processed to maximize the yield and quality of bio-oil. Various characterization techniques were followed, such as proximity analysis, ultimate analysis, extractives and composition analysis, crystallinity index, FTIR analysis and TG analysis. The characterization study concluded that the chosen feed stocks were rich in extractives and cellulose contents and least in lignin and hemicelluloses contents. This information predicted that pyrolysis of such feedstocks may produce higher yield of liquid product. The thermal analysis confirmed that the decomposition temperature for all of the seed materials lied in the temperature range of 150-450oC. The kinetic study for all the feed materials were studied and compared by varying the rate of heating from 5 to 15 oC min-1 using TGA/DTG analysis. The study illustrated that the seeds had very close activation energy among them.
Supervisor: Kaustubha Mohanty