作　　者： ; ; ; ; ; ;

机构地区： 中国科学院

出　　处： 《燃料化学学报》 2012年第2期197-201,共5页

摘　　要： 研究了掺杂过渡金属盐(La、Ce、Zr、Mn)对亚铁锌双金属氰化物(DMC)固体酸催化剂合成生物柴油的影响,并采用XRD、FT-IR、ICP、BET等方法对其进行结构和性能表征。结果表明,1%的镧、铈、锆、锰金属盐对催化剂的活性都有提高,其中,添加1%镧的DMC催化剂活性最高,在醇油摩尔比16∶1,反应温度160℃,催化剂加入量2%条件下,反应7 h,脂肪酸甲酯收率达到99.3%。过渡金属盐引入对催化剂的组成没有影响,但使得催化剂更加分散,颗粒粒径更小,比表面积变大,有利于催化剂和反应物的接触,从而提高了催化剂活性。 Effects of transition metals（La,Ce,Zr,Mn） on catalytic performance of double metal cyanide（DMC） catalysts for biodiesel synthesis were studied.The structure and performance of the catalysts were studied using XRD,FT-IR,ICP,BET et al.The experimental results showed that the DMC catalyst prepared by adding 1% of transition metal salts had higher activity.The catalyst with highest catalytic activity was prepared by adding 1% of La（NO3）3·nH2O.Under the conditions of methanol/oil mol ratio of 16∶1,catalyst amount of 2% and temperature of 160 ℃,a high yield（99.3%） of fatty acid methyl esters（FAME） was obtained within 7 h.The analytical results showed that adding 1% of transition metals did not change the molecular formula of Fe（II）-Zn double metal cyanide complex catalysts,while it improved particle dispersion,decreased particle size and increased surface area.This was the reason that transition metals promoted catalysts had higher activity.

关 键 词： 过渡金属 双金属氰化物 生物柴油 固体酸

领　　域： [化学工程]