本研究以改良生質柴油的微波設備以及比較傳統加熱與微波製程對於生質柴油之酯化反應的加速效率為目標。
目前市面上的微波儀器僅供少量反應物實驗使用，或者是需要使用大功率波源才能加熱較多的反應物，為此本研究延續了實驗室學長們的設計，使用第二代的微波腔體，僅需一個2.45GHz的波源，且目前的輸出功率只需要到1kW，實現降低廢熱、能源的高效轉換，延續了阻抗匹配的良好彈性讓實驗操作能夠穩定，並增加了反應容量。
本研究分別在傳統加熱製程以及微波腔體製程下進行了不同反應溫度的酯化反應實驗，皆沒有添加催化劑，並且從數據上已明顯看出微波製程相較傳統製程已有差異，且反應溫度越高，微波製程的加速就越明顯，就攝氏200度反應來說，同樣從酸價(Acid Value) 20dB降到8.5dB，傳統加熱需要6小時而微波僅需4小時，考慮到隨著到達反應終點，反應速率下降，耗時會上升許多，可以斷定降到AV 5dB之時，微波的反應時間是可以少於傳統製程的一半。
本研究除了量測AV變化之外，另外藉由氣相色譜法以及場強化共振腔微擾法分別測量了實驗樣品的各成分含量以及該介電系數，期許可以發現兩者間關聯的蛛絲馬跡。
本研究後續改良出了第三、第四代的微波腔體，將原先的攪拌式更改成噴霧式，將反應物霧化並把反應腔長拉長，增加微波作用的面積及時間，並將波導管改成一對二的雙出口波導管，降低位於波導管出口之鐵氟龍塊材上的能量密度，以免碳化燒毀，但四代腔體尚有升溫問題，仍無法滿足實驗需求，期許未來能夠將四代腔體完善並投入實驗以更進一步提升酯化反應的速率。

This work aims to improve the microwave cavity to accelerate the rate of esterification reaction for biodiesel compared by conventional heating process.
The microwave instruments on the market currently are only used for the experiments with a small amount of reactants. For this reason, this research follows the design of the laboratory seniors, using 2nd microwave cavity, which is driven by a 2.45 GHz source and the output is less than 1kW, realizing the efficient conversion of energy and lowering waste heat, and the good flexibility of impedance matching, makes the experiment operation stable.
In this work, with no catalyst added, esterification experiments were carried out under the conventional heating process and the microwave cavity process with different reaction temperatures. Obviously, the data shows that the reaction rate of microwave process is faster than conventional one, and the higher reaction temperature, the more difference between microwave and conventional one. Taking 200°C experiment into account, it requires 6 hours for acid value reduced from 20dB to 8.5dB under conventional process, while it only requires 4 hours for that under microwave one. As the esterification reaching the reaction end, when the reaction rate approaching 0, the time-consuming of reaction will increase a lot, and the subsequent time for microwave process to reach the reaction goal, AV dropping to 5dB, can be less than half of the traditional process.
In addition to measuring AV, this study also measured the content of each component of the experimental sample and measured the dielectric coefficient by gas chromatography and field-enhanced resonant cavity perturbation respectively.
We propose the 3rd and 4th generation microwave cavities subsequently. Changing the original stirring type to a spray type, the reactants are atomized and the length of the cavity is extended to increase the interacting area and time with microwave, and the wave guide is reshaped into a one-to-two wave guide to reduce the energy density on the teflon window, avoiding carbonization and burnt.

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