KOH/SBA-15负载型固体碱催化剂的合成、表征及催化性能

摘要

采用后合成法制备出固体碱催化剂KOH/SBA-15,利用X射线衍射法(XRD)、N2吸附-脱附(BET)、透射电镜(TEM)、化学吸附剂表面碱性测定(CO2-TPD)等对其进行表征.考察了其在大豆油酯交换反应制备生物柴油中的催化性能.结果表明,在相同反应条件下,与CaO/SBA-15和MgO/SBA-15相比,KOH/SBA-15在催化活性和孔扩散上都具有较大的优越性,催化制备生物柴油产率最高(83.56％).%SBA-15 was modified by introducing an active component by post-synthetic method for preparing a solid base catalyst KOH/SBA-15. Characterization was carried out by XRD,BET,TEM and CO2-TDP to understand the nature. KOH/SBA-15 catalytic performance on transesterification to produce biodiesel from soybean oil was studied. In the same reaction conditions, compared to CaO/SBA-15 and MgO/SBA-15,(15%)KOH/SBA-15 showed the highest yield of biodiesel,due to its favorable superiority on catalytic activity and pore diffusion.