摘要
采用等体积浸渍法制备了纳米K2CO3／γ-Al2O3催化剂，并研究了该催化剂的制备条件对酯交换反应的影响。用TEM表征催化剂颗粒的大小，用TG-DSC表征催化剂的热性能。结果显示：催化剂粒径分布在30-50nm之间；催化剂的最佳制备条件是K2CO3负载率（K2CO3占γ-Al2O3质量分数）50％，焙烧温度600℃，焙烧时间4h。利用此催化剂，当醇油物质的量之比为12：1、催化剂用量为油质量的3％、反应时间3h、反应温度70℃时，生物柴油的得率达到97．90％。生物柴油质量指标符合国家标准。
The nano K2CO3/γ-Al2O3 catalyst was prepared by isochoric impregnation, and the effects of preparation conditions of catalyst on transesterification were studied. The thermal properties and the size of catalyst were characterized by TEM and TG-DSC. Results of TEM showed that the size of catalyst was 30-50 nm. The optimal conditions to prepare catalyst were as follows： mass ratio of K2CO3 to γ-Al2O3 was 50 %, calcination temperature was 600 ℃, calcination time was 4 h. The best conditions to prepare biodiesel as follows： the rn（methanol） to re（oil ）was 12： 1, re（catalyst） in oil was 3 %, the reaction time was 3 h, the reaction temperature was 70 ℃, and the final yield could reach 97.90 %. Quality specifications of biodiesel are accord with the national standard.
出处
《生物质化学工程》
CAS
2008年第1期6-10,共5页
Biomass Chemical Engineering
基金
863重点项目(2007AA100703)
新世纪优秀人才支持计划(NCET-05-0668)
