Production of biodiesel from waste cooking oil using ZnCuO/N-doped graphene nanocomposite as an efficient heterogeneous catalyst
Production of biodiesel from waste cooking oil using ZnCuO/N-doped graphene nanocomposite as an efficient heterogeneous catalyst
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DOI：
10.1016/j.arabjc.2020.102982
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发表时间：
2021-01-27
影响因子：
6
通讯作者：
Siddiqui, Mohammed Rafiq H.
中科院分区：
文献类型：
--
作者：
Kuniyil, Mufsir;Kumar, J. V. Shanmukha;Siddiqui, Mohammed Rafiq H.
使用多相催化剂生产生物柴油可以降低分离过程的成本，从而使生物柴油的成本降到最低。采用简易机械化学方法合成了掺杂ZnCuO/ n的石墨烯（NDG）催化剂，并对废食用油（WCO）与甲醇的酯交换反应制备生物柴油进行了试验。系统考察了催化剂负载（0 ~ 15 wt%）、NDG质量百分比（10 ~ 100%）、甲醇油摩尔比（6:1 ~ 18:1）、反应时间（210 h）和反应温度（120 ~ 200℃）对反应的影响。此外，通过XRD、FTIR、N-2吸附、HRTEM、TGA和拉曼光谱对制备的催化剂的性能进行了评价。结果表明，在相同条件下，与不含NDG的ZnCuO催化剂相比，ZnCuO/(X%)NDG纳米复合材料的催化性能有所提高。由于在催化体系中加入了NDG， ZnCuO/(X%)NDG纳米复合材料的效率得到了提高，从而在很大程度上提高了混合金属氧化物（MMO）的表面积、缺陷位点等性能。ZnCuO/(30%)NDG催化剂在负载10 wt%、甲醇油摩尔比15:1、反应时间8 h、反应温度180℃的优化条件下，对WCO的酯交换反应活性最高（97.1%）。此外，回收的催化剂成功地重复使用了六次，其活性没有明显的损失。(C) 2020由爱思唯尔B.V.代表沙特国王大学出版。
The use of heterogeneous catalyst for biodiesel production can reduce the price of separation process and therefore minimize the biodiesel cost. ZnCuO/N-doped graphene (NDG) catalyst synthesized by facile mechanochemical procedure was tested in the transesterification of waste cooking oil (WCO) with methanol to produce biodiesel. The effects of catalyst loading (0-15 wt%), weight percentage of NDG (10-100%), methanol to oil molar ratio (6:1-18:1), reaction time (210 h) and reaction temperature (120-200 degrees C) were systematically studied at the optimal conditions. Additionally, the properties of the fabricated catalysts were assessed via XRD, FTIR, N-2 sorption studies, HRTEM, TGA and Raman spectroscopy. It was found that the ZnCuO/(X%)NDG nanocomposites exhibit enhanced catalytic performance when compared with the ZnCuO catalyst (without NDG) under the identical conditions. The efficacy of the ZnCuO/(X%)NDG nanocomposites has improved owing to the inclusion of NDG in the catalytic system, which in-turn enhanced the properties of the mixed metal oxides (MMO's) such as surface area, defective sites to a great extent. The ZnCuO/(30%)NDG catalyst displayed a highest catalytic activity towards transesterification of WCO (97.1%) at the optimized conditions of 10 wt% catalyst loading, 15:1 methanol:oil molar ratio, 8 h reaction time and 180 degrees C reaction temperature. Moreover, the recovered catalyst was successfully reused six cycles with no discernible loss in its activity. (C) 2020 Published by Elsevier B.V. on behalf of King Saud University.