After trans-esterification, Is it necessary to water wash the biodiesel.
Depending on the production route, it is necessary to remove contaminants such as glycerol, catalyst and secondary products from the reaction.
Yes, that is correct, even sometimes its necessary to heat the product after washing up to 100-110 C .
If d you have to wash your biodiesel before blending means that the product was off spec! In this case washing is a kind of refining step
it depends on the steps of the production method. The final step is washing and left the product in the Oven for 4-hours at 100 C. Regards
some skip water wash by using zeolite with ion exchange capacity, they call it drywashing, I dislike this as produces additional solid waste
Yes that is correct, to remove the remaining glycerol. Even heating the product to remove the water is recommended. Regards
yes, that is necessary, if you didnt purify biodiesel sample after washing. it effecys on your blending ratio and might be eggect on combustions in engine too.
Definitely, the catalyst should be washed out to have purity of biodiesel which can ultimately reduce ash content.
Water washing is a part of step under biodiesel production which should be done before it blend with diesel. Water washing only requires if you were employed homogeneous catalyst. Cause, homogeneous catalyst can be separated from FAME due to their solubility. Water wahsing is done to extract polar homogeneous catalyst and should remove waste water via gravity separation followed by heating at 110 degree of celcius for 10 minutes.
After that you obtained purified biodiesel then blending process can be done at 2000 rpm for 15 minutes. After the blending it is not a problem heating the solution at 110°C but it not necessary. Please refer some of my articles
Please refer this article it will give you full answer
https://www.researchgate.net/publication/357737638_Effects_of_Physico-Chemical_Properties_of_the_Blended_Diesel_and_Waste_Cooking_Oil_Biodiesel?_sg%5B1%5D=
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