Author Topic: Discussion concerning the impact of Lewis acids on unsaturated fatty acid system  (Read 2043 times)

Offline JanW

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This paper wishes to discuss the oils and fats as carriers of Lewis bases due to their contents of double bonds and how the present metal ions and salts may affect the raw materials themselves, but also as a precursor for e.g. biodiesel production and their impact on final product quality.

https://onedrive.live.com/redir?resid=992CE75F99A09FF8!805&authkey=!AFED757zFKAUSFk&ithint=file%2cpdf

Offline Julian

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Jan, a warm welcome to the wiki and forum … good to have a real expert on board!

I read your paper but, being a complete novice when it comes to things chemical, only understood parts of it.  I’m sure others with a superior grasp of the subject will be along with more informed comments, however if these metal ions persist to the finished biodiesel, what deleterious effect are they likely to have on the product?

PS, if you wish you’re welcome to put the paper on the wiki (there’s an “Experimental processes, equipment and trials“ section).  To that end I've just given you wiki editor rights.
Used Cooking Oil Collection website ... http://www.surreyusedcookingoilcollection.palmergroup.co.uk

Offline JanW

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Thank you for the compliments Julian. It is very possible that the complexes formed will occur ,in connection with the combustion, as deposits. But, the processes of producing biodiesel are quite efficient when it comes to draining inorganic impurities. It is however unclear at this stage, if already formed complexes before processing will be affected at all.
I will follow your advice for the Experimental processes, equipment and trials section.

Offline dgs

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Jan,
Hello and welcome to the forum. I'm sure I speak for many on here when I say we are privileged to have you amongst us.

I hope we live up to your expectations.
FOC water tests by Sandy brae or Karl Fischer for forum members.

Offline JanW

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Thank you. I am sure you will.

Offline dgs

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Jan, Hello.
A most interesting paper, although a lot of it is 'over my head' so to speak. However the question begs, Would a GC analysis pick up the presence of the metal ion complexes. If so has anyone ever run a series of tests to check. Thankyou.
FOC water tests by Sandy brae or Karl Fischer for forum members.

Offline JanW

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Hello dgs. I would suggest ICP as a method to detect inorganic impurities. We did a lot of feedstock ICP detections when I was working with Ageratec and we came up over time with the following maximum values:
Ca 25, Mg 10, P 20, Cl 10, S 20 mg/kg. Many of the in the article critical inorganics  are not represented here, since our focus was meeting the EN 14214 for the produced biodiesel, rather than inhibit complex formations. In that case the focus would have included Na, K, Al, Fe, Cu, Ni and Zn.  Ok, the catalyst for biodiesel will have some Na or K, but it is good to be aware of any possible process disturbances before processing.