【摘要】：采用水熱法制備Mg(OH)_2載體,以乙醇-水混合溶液為溶劑、采用沉淀浸漬法制備栗毛球狀CaO@MgO堿催化劑,并將其應(yīng)用于甲醇和大豆油為原料的生物柴油制備體系。采用XRD,TGA,SEM,CO_2-TPD等技術(shù)對(duì)催化劑試樣的微觀結(jié)構(gòu)進(jìn)行表征,考察了反應(yīng)時(shí)間、反應(yīng)溫度、油醇摩爾比和催化劑用量等因素對(duì)生物柴油收率的影響。表征結(jié)果顯示,焙燒溫度為700℃、鎂鈣質(zhì)量比為1∶5的堿催化劑5CaO@MgO具有栗毛球狀規(guī)整的形貌,催化活性更高。實(shí)驗(yàn)結(jié)果表明,在反應(yīng)時(shí)間1 h、反應(yīng)溫度70℃、油醇摩爾比1∶15、催化劑用量1.5%(w)的最佳反應(yīng)條件下,生物柴油的收率可達(dá)98.8%。5CaO@MgO堿催化劑具有較好的耐水性和可重復(fù)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，

本文編號(hào)：2409424