磺化煤催化剂的性能特征及其在生物柴油工业应用研究

Study on property characterization of sulphonated coal and its application in biodiesel industry

研究了磺化煤制备过程的结构转化及其在高酸价油脂制备生物柴油中的应用。采用IR、SEM和XRD等对催化剂的结构和性能进行了表征。IR光谱图表明磺化煤分子结构中存在大量的酸性基团;SEM图观测到光滑原料煤的结构经磺化后变得酥松多孔;XRD图谱表明原料煤经磺化后的基本晶型骨架没有变化。正交实验得到较理想的预酯化反应条件为:醇油物质量比为56∶1,催化剂(相对油脂)用量为20%,反应温度70℃,反应时间为2 h,油脂转化率达到93.40%。

Structural transition in the preparation of nanometric sulphonated coal and its application as the catalyst of pre-esterification of oils with high acid value for biodiesel production are studied.The catalyst is characterized by IR,SEM and XRD.IR spectra show that there are lots of acid functional groups in the internal structure of solid acid.It is observed that the smooth coal structure has become porotic by SEM.The crystal framework of sulphonated coal is almost identical to that of coal,which is confirm...