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Research Detail

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S. K. Banik
Institute of Fuel Research and Development, BCSIR, Dr. Qudrat- E- Khuda Road, Dhanmondi Dhaka-1205.

D. Saha
Department of Applied Chemistry and Chemical Engineering, University of Dhaka, Bangladesh.

F. Afrose
Department of Applied Chemistry and Chemical Engineering, University of Dhaka, Bangladesh.

T. Rabeya
Institute of Fuel Research and Development, BCSIR, Dr. Qudrat-E- Khuda Road, Dhanmondi, Dhaka-1205.

M. S. Islam
Institute of Fuel Research and Development, BCSIR, Dr. Qudrat-E- Khuda Road, Dhanmondi, Dhaka-1205.

M. Khanam
Institute of Fuel Research and Development, BCSIR, Dr. Qudrat-E- Khuda Road, Dhanmondi Dhaka-1205.

M. A. Rouf
Institute of Fuel Research and Development, BCSIR, Dr. Qudrat-E- Khuda Road, Dhanmondi Dhaka-1205.

The Pithraj seed has been collected from Gazipur district, Bangladesh. The oil from the seed was extracted by using Soxhlet apparatus using petroleum ether extraction method. Maximum yield of oil was found to be 50 % when the process was carried out for 2.5 hours. The physicochemical properties of the extracted oil were studied. The properties of the oil reveal that the oil corresponds to diesel except acid value and sulphur content. The optimum conditions of the transesterification of the oil was 40% ethanol and 0.45% KOH at 75 0C for 1.5 hours. The optimum yield was more than 95 %.

  Pithraj seed, Biodiesel, Transesterification, Seed oil
  Market of Gazipur, Bangladesh
  
  
  Postharvest and Agro-processing
  Pitraj

To look into the preparation of bio-diesel from pithraj seed oil, optimization of different parameters for maximum bio-diesel production.

Oil Extraction Pithraj seeds were purchased from local market of Gazipur,Bangladesh and dried properly in the sun for several hours and then grinded. Then ground powder was screened to separate the coarse ones and which was again grinded for homogeneous.Extraction of oil from the powders using petroleum ether as solvent was then carried out in Soxhlet apparatus at 60-80 0C and at reflux temperature of solvent. After extraction of oil, the solvent petroleum ether was separated and solvent free oil was obtained. The oil was found to be viscous and dark brown in color. The oil was directly used as main raw material for bio-diesel production. The properties of the oil were then determined and recorded Determination of the fatty acids and fats The acid value of the reaction mixture was determined by a standard acid-base titration method using a standard solution of1.0 M KOH solution. Biodiesel productions prior to transesterification,acid esterification of the oil was required to reduce(57%) the free fatty acid. The ethanol and catalyst conc. H2SO4 mixture was then charged into a 2-neck closed reaction vessel and the raw oil was added. The reaction temperature was around 70 0C at agitation rate 400 rpm for 2 hours. After completion of transesterification, ethyl ester was separated from mixture of ethyl ester and glycerin. The mixture was taken in a separating funnel and left for 16 hours. The mixture was separated in two layers, bio-diesel as the top layer and glycerin as bottom layer. Glycerin layer was withdrawn and required product was obtained. Washing of bio-diesel is necessary to remove the soluble components. Hot water was sprayed on top of the bio-diesel. Then it was allowed to settle down. The product was dried using a vacuum evaporator at 80 0C and pressure was 180 atm. pressure. After drying the product became clear. After purification of bio-diesel, the fuel properties of bio-diesel were determined by laboratory method. To determine the properties of bio-diesel produced from Pithraj seed oil, different ISO standard methods were used.

  Bangladesh J. Sci. Ind. Res. 50(2), 135-142, 2015
  
Funding Source:
  

 The percentage of oil in its seed is higher (50%) compare to other non-edible seeds of bio-diesel such as rubber (31.8%) seed. The optimum condition for transesterification is 40 % ethanol and 0.45 % KOH catalyst and the reaction temperature and time is 75 0C and 1.5 hrs respectively. The physicochemical properties of the base oil are correspond to diesel except acid value and sulphur content. But after transesterification the oil became suitable to use as a substitute of diesel. Bangladesh does not have any petroleum resources, so this type of renewable fuel will be very helpful to solve our present fuel oil crisis.

  Journal
  

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