改性凹凸棒脱色剂对餐饮废油制生物柴油的脱色性能

摘要

[目的]探讨改性凹凸棒对餐饮废油生物柴油的脱色性能.[方法]以餐饮废油为原料,采用酯交换法制备生物柴油;以酸改凹凸棒为载体,Mn(NO3)2为活性前驱体,通过浸渍-焙烧法制备脱色剂,并将其用于餐饮废油生物柴油的脱色试验.[结果]脱色剂的最佳制备条件:焙烧温度450 ℃,负载时间 3 h,焙烧时间4 h,Mn(NO3)2加入量 10%;生物柴油与脱色剂质量比为 10∶2 时,生物柴油的脱色率为 90.56%.[结论]脱色后生物柴油的多项性能有所提高.%[Objective]To study the effect of modified attapulgite on the decoloration performance of biodiesel from waste cooking oil.[Method]The ester exchange method was used to prepare biodiesel with waste cooking oil.By using acid-treating attapulgite as carrier,Mn(NO3)2as active precursor,the decolori-zer was prepared by dipping roasting method.[Result]The best preparation conditions of decolorizer are:450 ℃ calcination temperature,3 hours load time,4 hours roasting time and 10% Mn(NO3)2.When mass ratio of biodiesel to decolourizer is 10∶2,the decolorization rate of biodiesel is 90.56%.[Conclusion]The major properties of biodiesel are improved after decolorization.