Naagar Manish, Chalia Sonia, Thakur Preeti, Sridhara S N, Thakur Atul, Sharma P B
Department of Aerospace Engineering, Amity University Haryana, Gurugram, Haryana 122413 India.
Department of Physics, Amity University Haryana, Gurugram, Haryana 122413 India.
Environ Chem Lett. 2021;19(5):3727-3746. doi: 10.1007/s10311-021-01247-2. Epub 2021 May 4.
Fossil fuel depletion and pollution are calling for alternative, renewable energies such as biofuels. Actual challenges include the design of efficient processes and catalysts to convert various feedstocks into biofuels. Here, we review nanoferrites heterogeneous catalysts to produce biodiesel from soybean and canola oil. For that, transesterification is the main synthesis route and offers simplicity, cost-effectiveness, better process control, and high conversion yield. Catalysis with nanoferrites and composites allow to obtain yields higher than 95% conversion with less than 5.0 wt.% of catalyst loading at 80 °C in 1-2 h. More than 90% conversion yields can be achieved with a moderate alcohol/oil molar ratio, i.e., between 12:1 to 16:1. Catalyst recovery is easy due to the magnetic properties of nanoferrite, which can be effectively reused up to 4 times with less than 10% loss of catalytic efficiency.
化石燃料的枯竭和污染促使人们寻求生物燃料等替代可再生能源。实际面临的挑战包括设计将各种原料转化为生物燃料的高效工艺和催化剂。在此，我们综述了用于从大豆油和菜籽油生产生物柴油的纳米铁氧体多相催化剂。为此，酯交换反应是主要的合成路线，具有操作简单、成本效益高、过程控制良好以及转化率高的优点。使用纳米铁氧体及其复合材料进行催化，在80℃下1-2小时内，催化剂负载量低于5.0 wt.%时，转化率可高于95%。在适中的醇/油摩尔比（即12:1至16:1之间）下，转化率可达到90%以上。由于纳米铁氧体的磁性，催化剂回收容易，可有效重复使用多达4次，催化效率损失不到10%。
