Heterogeneous and efficient transesterification of Jatropha curcas L. seed oil to produce biodiesel catalysed by nano-sized SO42-/TiO2
Heterogeneous and efficient transesterification of Jatropha curcas L. seed oil to produce biodiesel catalysed by nano-sized SO42-/TiO2
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纳米 SO42-/TiO2 催化麻风树种子油非均相高效酯交换反应生产生物柴油
DOI：
10.1098/rsos.181331
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发表时间：
2018-11-01
影响因子：
3.5
通讯作者：
Wu, Guoqiang
中科院分区：
文献类型：
--
作者：
Chen, Chao;Cai, Lei;Wu, Guoqiang
开发高效的酯交换反应催化剂对小桐子生物柴油的生产具有重要意义。种子油（JO）。本文通过改变硫酸浓度（xSO（4）（2-）/TiO 2）和TiO 2催化剂的处理，合成了一系列硫酸化TiO 2，并将其应用于JO的酯交换反应。采用XRD、FT-IR、N2-吸附、SEM、TEM、TG、py-IR和NH3-TPD等表征手段对这些异质结构进行了表征，并考察了它们在不同操作条件下的催化性能。结果表明，在xSO（4）（2-）/TiO 2催化剂中同时存在Bronsted酸中心和刘易斯酸中心，而在TiO 2催化剂中只存在路易斯酸中心.硫酸处理后的TiO 2催化剂的酸强度、比表面积和介孔体积均得到明显提高。xSO（4）（2-）/TiO 2催化剂比TiO 2催化剂具有更高的催化活性，这与其具有更大的比表面积和介孔体积以及更强的酸性有关。此外，还研究了1.5SO（4）（2-）/TiO_2催化剂在JO酯交换反应中的重复使用性能。
Developing high-efficiency hetero-catalysts for transesterification reaction is of great importance in the production of biodiesel from Jatropha curcas L. seed oil (JO). Here, we synthesized a series of sulfated TiO2 by treating with varying H2SO4 concentration (xSO(4)(2-)/TiO2) and TiO2 catalysts and applied to the transesterification of JO. Furthermore, these heterostructures were characterized by many characterization methods including XRD, FT-IR, N-2-adsorption, SEM, TEM, TG, py-IR and NH3-TPD, and their catalytic performance was investigated under various operating conditions. The results reveal that both the Bronsted and Lewis acid sites are presented in the xSO(4)(2-)/TiO2 catalysts, while only Lewis-type sites are observed in the TiO2 catalyst. And the acid intensity, surface area and mesoporous volume of catalysts are improved obviously after treating TiO2 with sulfuric acid. Then the xSO(4)(2-)/TiO2 catalysts exhibit much higher catalytic activity than TiO2 catalyst, which is attributed to the larger surface area and mesoporous volume and stronger acidity. Furthermore, the reusability behaviour of 1.5SO(4)(2-)/TiO2 catalyst in the transesterification of JO was also studied.