Efficient catalytic production of biodiesel with acid-base bifunctional rod-like Ca-B oxides by the sol-gel approach
Efficient catalytic production of biodiesel with acid-base bifunctional rod-like Ca-B oxides by the sol-gel approach
复制标题
溶胶-凝胶法利用酸碱双功能棒状Ca-B氧化物高效催化生产生物柴油
DOI：
10.3390/ma12010083
复制
发表时间：
2019
期刊：
影响因子：
3.4
通讯作者：
Song Yang
中科院分区：
文献类型：
--
作者：
Anping Wang;Hu Li;Heng Zhang;Hu Pan;Song Yang
寻找酸碱双功能催化剂已成为利用可再生资源制备生物燃料的研究热点。本文采用溶胶-凝胶法制备了一系列新型的酸碱双功能金属硼催化剂，并通过XRD、IR、SEM、TEM、TGA、BET、TPD等手段对催化剂进行了表征。其中，Ca-B（700）催化剂的酸碱中心密度最高，对高酸值非食用油脂制备生物柴油具有良好的催化性能。在醇油摩尔比为20：1、催化剂用量为4wt%、反应温度为105 °C、反应时间为2 h的最佳条件下，一锅法小桐子油生物柴油的产率可达96.0%。此外，Ca-B（700）也适用于梧桐生产生物柴油。在65 °C下2小时后，具有几乎定量的产率（98.5%）的相对低酸值的油。Ca-B（700）催化剂具有良好的稳定性和重复使用性，是一种很有前途的制备生物柴油的酸碱双功能催化材料。
The search for acid-base bifunctional catalysts has become a hot topic in the preparation of biofuels from renewable resources. In the present work, a series of novel acid-base bifunctional metal-boron catalysts were successfully prepared by a sol-gel method and characterized by XRD, IR, SEM, TEM, TGA, BET, and TPD. Among those bifunctional solid materials, the Ca-B(700) catalyst had the highest density of both acid and base sites and showed excellent catalytic performance in the production of biodiesel from nonedible oils with high acid value. Under the optimal reaction conditions of 20/1 methanol/oil mole ratio and 4 wt % catalyst dosage at 105 °C for 2 h, a high biodiesel yield of 96.0% could be obtained from Jatropha curcas oil in one-pot. In addition, Ca-B(700) was also applicable to producing biodiesel from Firmiana platanifolia L.f. oil in a relatively low acid value, with an almost quantitative yield (98.5%) at 65 °C after 2 h. The Ca-B(700) catalyst had good stability and reusability, which is a promising acid-base bifunctional catalytic material for the preparation of biodiesel.