Due to its large number of potential utilizations Jatropha curcas L. (physic nut, purging nut), a tropical plant cultivated in many Latin American, Asian and African countries, has become topic of various research projects. Nutritional as well as technical applications, however, are restricted due to the plant’s toxicity. The seed oil contains phorbol esters, a family of compounds known to caus...

A continuous process for the transesterification of triglycerides to methyl esters was investigated in a pilot plant. The process was equipped with a motionlerr and a high-shear mixer. The experimental studies explored variations in the mixing intensity, stcichionetry, and catalyst concentration on the overall conversion. The combined as well as individual effect of mixers was examined. The dev...

This research focusing the performance and emission characteristics study on the application of biofuel emulsions as alternate fuel used Kirloskar AV1 Direct Injection Diesel engine. Diesel engine performance was compared using different fuels, namely Diesel, Jatropha Methyl Ester and Jatropha Methyl Ester Wood Pyrolysis Oil emulsion, by applying various loads. Emission characteristics were obs...

The purpose of this work is to study the esterification liquid olefins with acetic acid in presence catalysts and structure properties synthesized saturated esters. 1-Hexene, 2-methyl-1-pentene, 2-ethyl-1-pentene, 3-methyl-1-pentene, 3-methyl-2-pentene were used as for reaction: H2SO4 HCl. influence various factors (the nature catalysts, relative activity temperature a) on rate reaction was stu...

The substrate specificity and the mode of action of Aspergillus niger pectin methylesterase (PME) was determined using both fully methyl-esterified oligogalacturonates with degrees of polymerization (DP) 2-6 and chemically synthesized monomethyl trigalacturonates. The enzymic activity on the different substrates and a preliminary characterization of the reaction products were performed by using...

In this study, Biodiesel -Dimethyl Ether (BDE ) was tested in a 4-cylinder direct-injection diesel engine to investigate the performance and emission characteristics of the engine under five engine loads at the maximum torque .The engine speed was maintained at 1500 rpm. Here the jatropha oil is used as a non edible oil to produce the biodiesel. The dimethyl ether is used as an additive to enha...

In this study, corn oil as vegetable oil, chicken fat and fleshing oil as animal fats were used to produce methyl ester in a biodiesel pilot plant. The FFA level of the corn oil was below 1% while those of animal fats were too high to produce biodiesel via base catalyst. Therefore, it was needed to perform pretreatment reaction for the animal fats. For this aim, sulfuric acid was used as cataly...

One of the major issues with heterologous production of proteins in Pichia pastoris X33 under AOX1 promoter is repeated methanol induction. To obviate repeated methanol induction, methyl esters were used as a slow release source of methanol in lipase expressing mut+ recombinant. Experimental design was based on the strategy that in presence of lipase, methyl esters can be hydrolysed to release ...

Transesterification of vegetable oils in supercritical methanol are carried out without using any catalyst. Methyl esters of vegetable oils or biodiesels have several outstanding advantages among other new-renewable and clean engine fuel alternatives and can be used in any diesel engine without modification. The most important variables affecting the methyl ester yield during the transesterific...

The ionization and fragmentation patterns of 24 compounds with elemental composition CmH2mO2, including isomeric esters alkanoic acids, were investigated by atmospheric pressure corona discharge collision-induced dissociation (CID) mass spectrometry in the positive-ion mode. All ionized as protonated molecules NH4+ adducts. In addition, fragment ions observed spectra other than methyl esters, w...