Na2SiO3/ZrO2固体碱催化大豆油制备生物柴油的研究

采用浸渍法制备了固体碱催化剂硅酸钠/二氧化锆（Na₂SiO₃/ZrO₂）,并用其催化大豆油制备生物柴油。考察了催化剂焙烧温度、催化剂焙烧时间、硅与锆物质的量比、醇油物质的量比和催化剂用量等因素对生物柴油产率的影响。X射线衍射（XRD）表征结果显示,引入硅酸钠可调变催化剂中二氧化锆的晶相组成。对催化剂的性能测试表明,当催化剂焙烧温度为600 ℃、催化剂焙烧时间为3 h、硅与锆物质的量比为4、醇油物质的量比为7、催化剂用量（催化剂占大豆油的质量）为3%时,生物柴油的产率最高为92.5%。

Study on Na2SiO3/ZrO2 solid base-catalyzed transesterification of soybean oil to biodiesel

Na₂SiO₃/ZrO₂ solid base catalysts were prepared by immersion method and used to catalyze soybean oil to produce biodiesel.The effects of the different calcination temperature,calcination time,amount-of-substance ratio of silicon to zirconi-um,amount-of-substance ratio of alcohol to soybean oil and mass ratio of catalyst to oil on the transesterification reaction were investigated.XRD characterization results showed that the crystalline structure of ZrO₂ of the catalysts with addition of Na₂SiO₃ were improved.The determination results of catalysts indicated that when the calcination temperature was 600 ℃,cal-cination time was 3 h,amount-of-substance ratio of silicon to zirconium was 4,amount-of-substance ratio of alcohol to soybean oil was 7 and the catalyst dosage was 3% of soybean oil quality,then the highest yield of biodiesel reached 92.5% .