Characterization and compositional analysis of highly acidic karanja oil and its potential feedstock for enzymatic synthesis of biodiesel. (28th August 2018)

• Record Type: Journal Article
• Authors: Kumar, D.; Das, T.; Giri, B. S.; Verma, B.
• Is Part Of: New journal of chemistry. Volume 42:Number 19(2018)
• Page Start: 15593
• Page End: 15602
• Publication Date: 2018-08-28
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/c8nj03084g
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : In the present study, we focused on the synthesis of biodiesel from Pseudomonas cepacia, crude karanja oil by the process of enzymatic transesterification using bio-support materials, such as lipase immobilized on polyvinyl alcohol/AlgNa. Abstract : In the present study, we focused on the synthesis of biodiesel from Pseudomonas cepacia, crude karanja oil by the process of enzymatic transesterification using bio-support materials, such as lipase immobilized on polyvinyl alcohol/AlgNa. Enzymatic transesterification has taken over chemical methods due to its milder nature and environmental friendliness. 2-Propanol was utilized as an acyl acceptor during the biodiesel preparation. The optimized conditions for crude karanja ( Pongamiapinnata ) oil transesterification were 10% lipase (immobilized Pseudomonas cepacia lipase) based upon the oil weight, and a molar ratio of 6 : 1 between alcohol and oil at 50 ± 1 °C for 24 h. The maximum product obtained from crude karanja oil by using 2-propanol was 72.85%, while the conversion of biodiesel was calculated to be 75.16% during the 24 h. The results from this study showed the feasibility of economical biodiesel production using crude karanja oil product. Recyclability of the bio-support catalyst was studied for 11 cycles using 2-propanol as the acyl acceptor in the absence of a solvent under standard conditions. After the operation of 6 cycles, the bio-support catalyst could hold up to 71% of its initial yield of biodiesel. Physicochemical characteristics of the crude karanja oil were determined to evaluate its suitability for the production of biodiesel. The as-prepared karanja oil exemplified the composition of 9.75% linolenic, 6.24% linoleic acid, 60.25% oleic and 23.76% saturated acyl groups according to the proton nuclear magnetic resonance ( 1 H NMR)spectrum. The characteristics of crude karanja oil and biodiesel were analyzed as per ASTM D6751 and they were within the specifications. 1 H NMR analysis confirmed the formation of biodiesel.