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首页> 美国卫生研究院文献>Micromachines >Transesterification in Microreactors—Overstepping Obstacles and Shifting Towards Biodiesel Production on a Microscale
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Transesterification in Microreactors—Overstepping Obstacles and Shifting Towards Biodiesel Production on a Microscale

机译：微反应器中的酯交换反应—超越障碍并朝着微型生物柴油生产的方向发展

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Biodiesel, which was earlier used only as an alternative fuel, is now an indispensable component of commercial diesel. Conventional production processes are unable to cope with the increasing demand for biodiesel, and therefore more and more work is being done to intensify the existing processes. The intensification of the biodiesel production process, taking into account the environmental and economic factors, is based on increasing productivity. One way to achieve that is by reducing the volume of production units. The application of the enzymatic reaction path, while reducing the volume of process equipment to the micro-level, has significantly magnified the productivity of the biodiesel production process, which is primarily due to better mass transfer in microsystems. Additional breakthrough is the use of deep eutectic solvents (DES) instead of buffers for enzyme stabilization. In this study, a lipase from (TlL) (both commercial and produced by solid-state fermentation) was used as a catalyst for biodiesel production. Edible and waste sunflower oil, as well as methanol, were used as substrates. The reaction mediums were buffer and DES. The transesterification reaction was carried out in a batch reactor and the emphasis was made on different microreactor configurations. The highest yield of 32% for residence time of only = 30 min was obtained in the microreactor system with an emulsion of waste oil and a commercial enzyme suspended in a buffer. This indicates that enzymatic transesterification could be a valuable reaction path for dealing with waste oils. Furthermore, biodiesel synthesis in DES showed somewhat lower yields, but by increasing the water content in the system, the reaction could prove much better results. In the end, the effects of reaction conditions on the volumetric productivity of the process were analyzed.
机译：生物柴油，以前仅用作替代燃料，现在已成为商业柴油必不可少的组成部分。传统的生产过程无法应付对生物柴油的不断增长的需求，因此，越来越多的工作正在加强现有的过程。考虑到环境和经济因素，生物柴油生产过程的集约化是以提高生产率为基础的。实现这一目标的一种方法是减少生产单元的数量。酶促反应路径的应用，虽然将处理设备的体积减少到了微型水平，却显着扩大了生物柴油生产过程的生产率，这主要是由于微系统中更好的质量传递。另一个突破是使用深共熔溶剂（DES）代替缓冲液来稳定酶。在这项研究中，来自（TlL）的脂肪酶（既是商业生产的又是通过固态发酵生产的）被用作生产生物柴油的催化剂。食用和废葵花籽油以及甲醇被用作底物。反应介质是缓冲液和DES。酯交换反应在间歇反应器中进行，重点是不同的微反应器构型。在微反应器系统中，废油和悬浮在缓冲液中的商业酶乳剂在微反应器系统中的停留时间仅为30分钟，最高收率为32％。这表明酶促酯交换反应可能是处理废油的有价值的反应途径。此外，DES中的生物柴油合成显示出较低的收率，但是通过增加系统中的水含量，该反应可以证明效果更好。最后，分析了反应条件对工艺体积生产率的影响。

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