by
Lipid » Wed Jun 05, 2019 2:07 pm
AngelaEslava wrote:
Hello, I have the same question. Have you got the answer?
I use UCO for producing biodiesel. I have the analysis results from a certificate laboratory. They use the standardized method EN-14103 to analyze ester content. In fact, they analyzed almost all the parameters mentioned in EN-14214. However, the total content of the samples were between 91-93% (fatty acids, fats, esters, vegetable oils, glycerides, methanol, glycerol, contaminants, and so on). Only 82-85% were ester.
How is this possible? What can be the other 7-9% of the content?
It looks like you need to investigate your product deeper than simple EN-14103 and EN-14214. There are two main reasons (explanations) why you have such results and both of reasons are based on your UCO feedstock specs. First reason is the fatty acids profile of your UCO oil - if it is not a common mixture of C14-C24 fatty acids this could be an explanation (it is fixable with a proper analysis-certificate), second reason is the oily material which is not fatty acids based oils - e.g. hydrocarbons, waxes etc. this problem is also fixable but will require some deeper investigation. These two main situations are most common (they are both UCO feedstock based problems), but there are several other possibilities including wrong lab results.