In
this study WCO deacidification by esterification is investigated: the results show how both Amberlyst
46
and Purolite
D5081 catalysts maintain their performance in a Carberry reactor (where catalyst is confined to minimize mechanical stress) and a slurry reactor after several recycles. A46 was tested in the free
fatty acids esterification of blends of WCO with different ratios of crude rapeseed oil and diesel as a solvent. The results show how both the use of the blends with another oil with lower viscosity and diesel are
both beneficial to the reaction rate and to the properties of the finished biodiesel