878/5000

Dear Rajamohan,

The composition of the biodiesel is very variable, and depends on the process, the variables (time, temperature, batch or continuous process, residence time, catalyst used, homogeneous or heterogeneous system ...). In addition, for exact composition and quantitative analysis, it would be necessary, using the GC / MS technique, various standards, which are usually very expensive. As Professor Carmen Mateescu explained, there is not even a general formula that represents the exact composition of a given biodiesel. The formula representing esters and methyl esters is represented by CxHyOz but their coefficients are very variable, see the work quoted by Professor Kaisan Muhammad Usman.

As for pyrolysis oil (bio-oil) is even more complex, since we will have other elements involved in the formation of products resulting from this process. Examples we have the nitrogen in the bio-oil of algae, which have large amounts of proteins in their consistuição (source of nitrogen). In this way, another way of expressing the general formula of biodiesel would be CxHyOzNk ... The formation of products is very high and very variable and most important, dependent on the raw material.

Best regards,

Please find attached

Thank you Professor for your kind reply. Can we find the straight formula for the biodiesel in the form of CxHxOx using analytical techniques?

Biodiesel is the name of a mixture of various alkyl esters but not the name of a singular chemical compound, therefore it is not possible to have a biodiesel chemical formula of type CxHyOz. In the composition of biodiesel there are long chain (C12 to C24) fatty acids esters in different quantities and types. The most common forms of biodiesel are mixtures of ethyl stearate (formula C20H40O2) and methyl linoleate (formula C19H34O2). By analytical techniques it is not possible to determine a straight formula for biodiesel but its qualitative and quantitative composition by components.

Thank you Professor. I hope the same will be applicable for pyrolysis oil too.

Yes, pyrolysis oils are mixtures of many chemical compounds, even tens or hundred types of compounds may be found in a sample (long chain fatty acids, phenols, also nitroderivates etc.). The same answer as my previous one.

Thank you Professor.

878/5000

Dear Rajamohan,

The composition of the biodiesel is very variable, and depends on the process, the variables (time, temperature, batch or continuous process, residence time, catalyst used, homogeneous or heterogeneous system ...). In addition, for exact composition and quantitative analysis, it would be necessary, using the GC / MS technique, various standards, which are usually very expensive. As Professor Carmen Mateescu explained, there is not even a general formula that represents the exact composition of a given biodiesel. The formula representing esters and methyl esters is represented by CxHyOz but their coefficients are very variable, see the work quoted by Professor Kaisan Muhammad Usman.

As for pyrolysis oil (bio-oil) is even more complex, since we will have other elements involved in the formation of products resulting from this process. Examples we have the nitrogen in the bio-oil of algae, which have large amounts of proteins in their consistuição (source of nitrogen). In this way, another way of expressing the general formula of biodiesel would be CxHyOzNk ... The formation of products is very high and very variable and most important, dependent on the raw material.

Best regards,

Thank you Prof. Ferreira...

@sakthivel you arise a good question and respected prof answer well. i am also following this question.

@sakthivel and @tahir, I did a research on pyrolysis of sugarcane straw, heat required and kinetics of pyrolysis by TG and DSC analysis in different atmospheres. In the complementary materials have the products found in the pyrolysis of this biomass. Maybe I can help you some more.

DOI10.1007/s10973-018-7149-3

Best Regards

Thank you Professor...

Good