均質機促進菜籽油轉酯化反應之研究

Homogenizer enhanced transesterification of canola oil

張力文(Li-Wen Chang)

指導教授 ： 蕭明謙

崑山科技大學/工程學院/材料工程研究所/碩士(2012年)

摘要

因石化燃料有消耗殆盡的一天，因此，必須開發替代的再生能源。生質柴油是利用轉酯化反應製造而成。本研究使用菜籽油作為反應物，透過均質機促進轉酯化反應，並找出最佳製造生質柴油之反應參數，以及反應速率常數。本研究利用菜籽油作為原料，並以均質機促進轉酯化反應，研究發現於醇油莫耳比為8:1、觸媒添加量為0.75 wt%、均質機轉速在7000 rpm反應溫度在60 ℃下，10分鐘後生質柴油產率達97.93%，符合台灣CNS 15072 生質柴油標準規範96.5%以上，因此利用均質機促進反應物的混合，可於較低的反應溫度製造高產率之生質柴油。研究並探討反應溫度由55℃提高至65 ℃，對反應速率常數之影響，結果發現反應溫度由55 ℃提高至65 ℃，反應速率常數由0.127 min-1，提高至0.353 min-1。研究結果顯示，均質機轉速在9000 rpm，醇油莫耳比為8:1，NaOH添加量0.75 wt%，反應溫度於60℃，反應10分鐘，且生質柴油轉化率可達97.93％，此轉酯化反應之活化能為 94.72 kJ/mole。

關鍵字

生質柴油 ； 轉酯化反應 ； 均質機

並列摘要

The fossil fuels is limited, therefore, the development of renewable energy is very important. Biodiesel is defined as the fatty acid methyl esters made by transesterification of a vegetable oil or waste cooking oil. In this research, the use of canola oil as a raw material, through the homogenizer to enhanced transesterification reaction, the use of NaOH catalysis production biodiesel. A kinetic study of the transesterification of cannola oil was conducted under homogenizer at various temperatures and reaction times. In canola oil as raw material, in homogenizer process, the use of NaOH catalytic reaction, the optimum conditions was as follows: molar ratio of methanol to oil is 8:1 with NaOH concentration of 0.75 wt%, rotational speed 7000 rpm, reaction temperature at 60 ℃ and reaction time for 10 min. The conversion of canola oil into biodiesel was achieved 97.93% for 10 min. In this results, the use of canola oil as raw materials, biodiesel conversion are conformed the Taiwan CNS 15072 standard value of 96.5%. In additional, the rate constant increased from 0.127 min-1 increase to 0.353 min-1 with increasing reaction temperature from 55 ℃ to 65 ℃. The results showed that homogenizer rotation speed at 9000 rpm, canola oil-methnaol molar ratio of 8:1, NaOH concentration of 0.75 wt%, reaction temperature at 60 ℃, reaction for 10 minutes, and biodiesel conversion rate of up to 97.93%. Transesterification reaction of the activation energy was 94.72 kJ / mole.

並列關鍵字

Biodiesel ； Transesterification ； Homogenizer

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