栗毛球状CaO@MgO碱催化剂的制备及其在生物柴油制备上的应用
发布时间：2019-01-16 03:42
【摘要】：采用水热法制备Mg(OH)_2载体,以乙醇-水混合溶液为溶剂、采用沉淀浸渍法制备栗毛球状CaO@MgO碱催化剂,并将其应用于甲醇和大豆油为原料的生物柴油制备体系。采用XRD,TGA,SEM,CO_2-TPD等技术对催化剂试样的微观结构进行表征,考察了反应时间、反应温度、油醇摩尔比和催化剂用量等因素对生物柴油收率的影响。表征结果显示,焙烧温度为700℃、镁钙质量比为1∶5的碱催化剂5CaO@MgO具有栗毛球状规整的形貌,催化活性更高。实验结果表明,在反应时间1 h、反应温度70℃、油醇摩尔比1∶15、催化剂用量1.5%(w)的最佳反应条件下,生物柴油的收率可达98.8%。5CaO@MgO碱催化剂具有较好的耐水性和可重复利用性。
[Abstract]:The Mg (OH) _ 2 carrier was prepared by hydrothermal method, and the spherical chestnut CaO@MgO base catalyst was prepared by precipitation impregnation method in the ethanol-water mixed solution. The catalyst was applied to the preparation of biodiesel with methanol and soybean oil as raw materials. The microstructure of the catalyst was characterized by XRD,TGA,SEM,CO_2-TPD technique. The effects of reaction time, reaction temperature, molar ratio of oil to alcohol and the amount of catalyst on the yield of biodiesel were investigated. The results showed that the alkali catalyst 5CaO@MgO with calcination temperature of 700 鈩，
本文编号：2409424
[Abstract]:The Mg (OH) _ 2 carrier was prepared by hydrothermal method, and the spherical chestnut CaO@MgO base catalyst was prepared by precipitation impregnation method in the ethanol-water mixed solution. The catalyst was applied to the preparation of biodiesel with methanol and soybean oil as raw materials. The microstructure of the catalyst was characterized by XRD,TGA,SEM,CO_2-TPD technique. The effects of reaction time, reaction temperature, molar ratio of oil to alcohol and the amount of catalyst on the yield of biodiesel were investigated. The results showed that the alkali catalyst 5CaO@MgO with calcination temperature of 700 鈩，
本文编号：2409424
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