Biodiesel production by free fatty acid esterification using lanthanum (La3+) and HZSM-5 based catalysts
Biodiesel production by free fatty acid esterification using lanthanum (La3+) and HZSM-5 based catalysts
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DOI：
10.1016/j.biortech.2013.01.107
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发表时间：
2013-04-01
影响因子：
11.4
通讯作者：
Arroyo, Pedro A.
中科院分区：
文献类型：
--
作者：
Vieira, Sara S.;Magriotis, Zuy M.;Arroyo, Pedro A.
在这项工作中，对纯（LO）和硫酸化（SLO）氧化镧、纯HZSM-5和SLO/HZSM-5（用硫酸化氧化镧（SO42-/La2O3）浸渍的HZSM-5）的非均相催化剂的使用进行了评估。材料的结构表征 (BET) 显示硫酸化过程导致 SLO 和 SLO/HZSM-5 表面积值降低。 FTIR 显示了材料的谱带特征，FTIR-吡啶表明硫酸化材料上存在强布朗斯台德位点。在催化测试中，温度是对反应影响最大的参数。 LO、SLO、SLO/HZSM-5的最佳反应条件为10%催化剂、100℃温度和1:5 m(OA)/m(meOH)；HZSM-5的最佳反应条件为10%催化剂、100℃温度和1:20 m(OA)/m(meOH)。在这些条件下，LO 和 SLO 的转化率分别为 67% 和 96%，HZSM-5 和 SLO/HZSM-5 的转化率分别为 80% 和 100%。所有催化剂在首次使用后均失活，但SLO/HZSM-5的失活较小。 (C) 2013 Elsevier Ltd. 保留所有权利。
In this work the use of the heterogeneous catalysts pure (LO) and sulfated (SLO) lanthanum oxide, pure HZSM-5 and SLO/HZSM-5 (HZSM-5 impregnated with sulfated lanthanum oxide (SO42-/La2O3)) was evaluated. The structural characterization of the materials (BET) showed that the sulfation process led to a reduction of the SLO and SLO/HZSM-5 surface area values. FTIR showed bands characteristic of the materials and, FTIR-pyridine indicated the presence of strong Bronsted sites on the sulfated material. In the catalytic tests the temperature was the parameter that most influenced the reactions. The best reaction conditions were: 10% catalyst, 100 degrees C temperature and 1:5 m(OA)/m(meOH) for LO, SLO, SLO/HZSM-5 and 10% catalyst, 100 degrees C temperature and 1:20 m(OA)/m(meOH) for HZSM-5. Under these conditions the conversions were: 67% and 96%, for LO and SLO, respectively and 80% and 100%, for HZSM-5 and SLO/HZSM-5, respectively. All catalysts deactivated after the first use, but the deactivation of SLO/HZSM-5 was smaller. (C) 2013 Elsevier Ltd. All rights reserved.