- 學位論文
生化柴油製程之監測
Monitoring the Manufactoring Process of Biodiesel
摘要
本文之目的在於藉由量測交酯化反應過程中，物理或化學性質的改變，探討其與核磁共振光譜所計算出之脂肪酸甲酯（生化柴油）轉化率的關係，作為線上監測系統判斷甲酯轉化率的參考和依據。 本研究首先在同樣的參數與環境下進行交酯化反應，並就反應過程所呈現之電導度、pH值與透射率進行測試，發現透射係數呈穩定的對數遞增，確認了利用透射係數作為研判甲酯轉化率指標之可行性。 至於，透射係數與甲酯轉化率之關係，經迴歸分析發現，兩者皆呈穩定的對數遞增，且甲酯轉化率比透射係數先到達穩定，所推算出之透射係數與甲酯轉化率的關係式為： y=0.125*ln(16900x-6566.5) 其中，y為脂肪酸甲酯轉化率，x為反應物透射係數，定義在0.409∼0.522之間。當反應物透射係數為0.4時，脂肪酸甲酯轉化率大約為75％；反應物透射係數為0.5時，脂肪酸甲酯轉化率大約為95％。因此，此關係式可以作為線上即時監測系統判斷脂肪酸甲酯轉化率的一個依據及參考。
並列摘要
The study is trying to figure out the relationship between the changes of physical or chemical properties of reactant and the conversion of biodiesel calculated by nuclear magnetic resonance spectrum, and offering a reference for on-line monitoring system to estimate the conversion of biodiesel. Conductivity, pH and transmittancy of reactant was measured continuously during transesterification proceeded at same parameters and environment. The results revealed that transmittancy presents stable logarithm increasing, so it confirmed that using transmittancy as a indicator to estimate the conversion of biodiesel is practicable. In correlation analyzing, both conversion and transmittancy present stable logarithm increasing, and conversion became stable earlier than transimittancy did. The relationship between conversion and transmittancy can be described by y=0.125*ln(16900x-6566.5) where y is the conversion of biodiesel and x is the transimission coefficient of reactant defined within 0.409~0.522. When transimission coefficient is 0.4, the conversion is about 75%; when transimission coefficient is 0.5, the conversion is about 95%. Therefore, the equation can be a reference for on-line monitoring system to estimate the conversion of biodiesel.