NOVELTY - Increasing transesterification conversion of oils involves: packing a filler into a rotating packed bed reactor (10) containing a container (11) having upper side, lower side, peripheral wall, oil feed (12), gas inlet (13), oil outlet (14), rotary bed (15), and a packed reaction region (16); centrifugally rotating the rotary bed by rotary driver (20); injecting an oil and an additive into the rotary bed; performing transesterification; and collecting the oil and additive passing through the filler in the packed reaction region and then is collected at the oil outlet.    USE - For increasing transesterification conversion of oils e.g. tung oil, peanut oil, cottonseed oil, rapeseed oil (claimed) or biodiesel useful for automobiles or motorcycles.    ADVANTAGE - The method provides higher transesterification conversion, reduces the reaction time and thus lowers manufacturing costs. By centrifugally rotating the rotary bed, the oil is provided with kinetic energy to pass through the filler and transesterification conversion of the oil is raised and the oil is modified to become suitable fuel for automobiles or motorcycles.    DETAILED DESCRIPTION - Increasing transesterification conversion of oils involves: packing a filler into a rotating packed bed reactor (10) containing a container (11) having an upper side, lower side, peripheral wall, an oil feed (12) formed in the upper side of container, a gas inlet (13) formed in the peripheral wall of the container, an oil outlet (14) formed in the lower side of the container, a rotary bed (15) mounted rotatably and powered to rotate in the container having an inner wall allowing passage of oils and a packed reaction region (16) formed along the radial direction of the rotary bed and packed with the filler; centrifugally rotating the rotary bed relative to the container by a rotary driver (20); injecting an oil and additive into the rotary bed through the oil feed; centrifugally rotating the rotary bed forcing the oil and the additive to pass through the filler in the packed reaction region; performing transesterification reaction; and collecting, the oil and additive passing through the filler in the packed reaction region and then is collected at the oil outlet.    DESCRIPTION OF DRAWING(S) - The figure shows schematic side view in partial cross-section of a rotating packed bed reactor.    Rotating packed bed reactor (10)    Container (11)    Oil feed (12)    Gas inlet (13)    Oil outlet (14)    Rotary bed (15)    Packed reaction region (16)    Rotary driver. (20)