【摘要】：采用浸漬法制備K_2CO_3/CaO固體堿催化劑,考察其催化甲醇-油脂-碳酸二甲酯三組分耦合反應(yīng)體系制備無(wú)甘油生物柴油的性能。結(jié)果表明:在浸漬時(shí)間8 h、碳酸鉀負(fù)載量5%、焙燒溫度600℃時(shí),該固體堿催化劑在常壓回流、n(油)∶n(酯)∶n(醇)為1∶1∶8、催化劑用量15%的條件下,反應(yīng)60 min生物柴油產(chǎn)率可達(dá)97.88%;反應(yīng)得到的未經(jīng)處理的生物柴油中游離甘油的含量?jī)H為0.019 62%。采用TG、BET、SEM、CO_2-TPD及XRD等技術(shù)對(duì)該催化劑進(jìn)行了表征發(fā)現(xiàn),催化劑的高活性與碳酸鉀和氧化鈣經(jīng)高溫焙燒產(chǎn)生兩個(gè)新的堿性位點(diǎn)有關(guān)。
[Abstract]:K_2CO_3/CaO solid base catalyst was prepared by impregnation method. The catalytic performance of the catalyst was investigated for the synthesis of glycerol free biodiesel by the three-component coupling reaction system of methanol, grease and dimethyl carbonate. The results show that when the impregnation time is 8 h, the loading amount of potassium carbonate is 5, the calcination temperature is 600 鈩，

本文編號(hào)：2428113