There are several issues here. First is, what do you mean by biodiesel? If you mean the methyl ester of then carboxylic acid, work out the amount of acidk, then work out the per centage conversion. Unfortunately, that de3pends on what else is there, the other 46%. If you mean diesel from biological sources, pyrolysis is a good way to go.

The pyrolysis of a fatty acid, if done properly, can convert nearly all the acid to diesel because it loses the carboxyl group. The problem with something like oleic acid is the pyrolysis also tends to scission the double bond, which results in something in the kerosine range. So the next question is, what do you mean by pyrolytic oil, and why is there fatty acid in it? Why make biodiesel when you can make real diesel? Of course, again, pyrolysis diesel needs a reasonable cetane rating. Pyrolysis of a fatty acid that is saturated, like palmitic or stearic, makes such a good diesel that as long as the boiling point of the rest is OK.

So the short answer is, define what you really have there and if you can pyrolyse, do so. You will probably have to distill the product.

Thank you so much sir. That was really helpful Ian Miller Sir.

There are several methods (pyrolysis, transesterification, etc.) for production of biodiesel from the oil you have. But the first thing you should be looking at is the quality of the oil you have, and how suitable it will be for biodiesel production. You should be looking at the overall degree of saturation of the fatty acids in your samples, SAFA/PUFA ratios, etc., because that will to a greater extent determine the quality of biodiesel you get.

Since you have a relative significant percentage of Fatty Acids, it is possible to convert the oil o into biodiesel. But then you have to take into account the biodiesel yield, reaction conditions and cost. Also, as previous answers, the quality of the Fatty acids because it will have a huge impact in biodiesel quality and combustion performance. Nevertheless, the conversion of pyrolysis oil into a biofuel is a cutting edge and very interesting research subject. Not only biodiesel is a plausible path way, but emulsification (normally pyrolysis oil contains 20% of water) or direct combustion after the control of the most critical physical and properties. Also blends after pretreatment.

fisrt is to learn about feedstock properties, then make a few trials, compare results. But, having in front that it is a pyrolitic oil hydrogenbation would suit, but scale matters! Compare against your feasibility goals too! and after these improve the best variations. Pyrolisys and other thermal methods can be a possible route, but as it comes from such source what can be expected is described in course books. I'd look for esterifcation first and than trans-esterification. A well done esterification will be the key to all other downstream efforts.

Yes it is possible. We can prepare it in laboratory. Its price might be high and for this reason its acceptance and production in large scale is negotiable.

as you are saying hydrotreatment requires high scale to economy, above the scale of 100 kt/y, since pyrolytic oil has no acid moiety classical transesterification (or esterification) will not work. The best is to prepare heating oil out of it.

The simple answer is yes. The main reactant of the transesterification is triglyceride. Therefore, any oil containing triglycerides has the potential to be a triglyceride source. However, if the oil is high in free fatty acids (FFAs) , you may prefer to undergo a saponification reaction if you are using a base catalyst. This can be a problem on biodiesel yield as well as a layer separation.

However, this can be easily overcome by replacing the base catalyst with an acid catalyst. Cause acid catalyst does not promote FFA to react with catalyst. Apart from this, there is another way to overcome this by performing acid esterification before transesterification. Acid esterification should be repeated until the FFA content is reduced to 2%. Except for the high FFA, there was a problem again.

Acid esterification with sulfuric acid and methanol as an acid catalyst can be done easily.