ปฏิกิริยาทรานเอสเทอร์ริฟิเคชันของน้ำมันปาล์มและเอทานอลโดยใช้แคลเซียมออกไซด์ที่ผ่านการเคลือบฝังเป็นตัวเร่งปฏิกิริยา / ผดุงเดช ธรรมไชย = Transesterification of palm oil under ethanol using impregnated CaO as solid base catalysts / Phadungdach Thammachai
This paper presents the study of the transesterification of palm oil with ethanol using CaO solid base catalysts prepared by impregnation of calcium oxide with aqueous solution of sodium carbonate and calcination in static air at 800 °C for 5 hrs. The results indicated that the impregnation with Na₂CO₃ had a significant effect on the catalytic activity of CaO base catalysts. The impregnated catalyst catalyzed the transesterification of palm oil to biodiesel with fatty acid ethyl ester (FAEE) yield of 91.1% under the optimal condition (the final amount of deposited sodium ion in Na+/CaO (calcined Na₂CO₃/CaO) catalyst was 1 wt%, 20 wt% catalysts (wt of catalyst /wt of oil) and 9:1 ethanol/oil molar ratio in 20 hrs at 75 °C at stirring rate 300 rpm), whereas, no ethyl ester formation was observed when CaO without post-impregnation treatment was used as catalyst. In addition, it was found that derived catalysts from calcium carbonate and mollusk shell (Anadara granosa) showed high biodiesel production activity without post-impregnation treatment.