The Cr/ZrO2-bentonite catalyst was prepared using varying amounts of the impregnating precursor, ranging from 0 to 3% (w/w). The catalyst material was characterized using several techniques, including X-ray diffraction (XRD), X-ray fluorescence (XRF), Infrared Spectroscopy (IR), Transmission Electron Microscopy (TEM), Brunauer-Emmett-Teller (BET) surface area analysis, and ammonia-adsorption for acidity measurement. The research findings showed that the pillarization process enhanced the basal spacing, surface area, pore diameter, and total pore volume of the catalyst. However, increasing the amount of impregnated Cr metal on bentonite led to a decrease in basal spacing and surface area, although it resulted in a higher concentration of acidic sites. Experimental results demonstrated that the catalyst successfully converted castor oil into a liquid phase with a yield of 78.80% (w/w), of which 32.73% (w/w) was biogasoline.