KF and Sr O supported on montmorillonite catalyst for biodiesel production

With montmorillonite( MMT),KF and Sr O as raw materials,supported solid base catalyst( KSr/MMT) was prepared by impregnation method,and the catalytic performance of KSr/MMT in the production of biodiesel from soybean oil and methanol was studied. The catalyst was characterized by X-ray diffraction( XRD),scanning electron microscopy( SEM) and carbon dioxide- temperature programmed desorption( CO2- TPD),the relationship between catalytic performance and structure of the catalyst was discussed,and the effects of preparation factors of the catalyst and reaction conditions on the transesterification were investigated. The results showed that Sr F2 was the mainly active component in KSr/MMT; under the conditions of atmospheric pressure,molar ratio of methanol to soybean oil 9 ∶ 1,dosage of KSr/MMT supported by 25% KF 3%,reaction temperature 65 ℃ and reaction time 1 h,the yield of biodiesel could reach 99%. Meanwhile,the kinetics of the transesterification catalyzed by KSr/MMT was studied.