生質柴油製程之線上監測

On-Line Monitor for Biodiesel Production

李文聖(Wen-Sheng Lee) ； 謝志誠(Jyh-Cherng Shieh) ； 于明嘉(Ming-Jia Yu)

《農業機械學刊》 15卷2期 (2006/06) Pp. 31-40

https://doi.org/10.30062/JAM.200606.0004

摘要

本研究利用大豆油作為原料，以甲醇進行轉酯化反應產製生質柴油，並以氫氧化納作為觸媒。在相同實驗參數下：醇油比例15%(15g/100g)、氫氧化鈉用量0.5g、攪拌器轉速500rpm、反應溫度70℃、反應時間2小時，測試反應物之電導度、pH值與透射率，發現透射係數可以作為判斷脂肪酸甲酯（即生質柴油）轉化率之指標。至於反應物之透射係數與脂肪酸甲酯轉化率之關係，經迴歸分析發現：兩者皆呈穩定之指數遞增關係，且脂肪酸甲酯轉化率比透射係數先到達穩定。經進一步分析發現當透射係數介於0.409~0.552間時，兩者呈現高度正相關，且關係式為：y=0.125×ln(16990(下標 τ(下標 x))-6566.5)其中，y為脂肪酸甲酯轉化率，τ(下標 x)為反應物透射係數。此關係式可作為線上監測判斷脂肪酸甲酯轉化率之依據。

關鍵字

生質柴油 ； 轉酯化 ； 透射係數 ； 線上監測

並列摘要

A study was made of the transesterification reaction of soybean oil by means of methanol, using sodium hydroxide as catalyst. Under the same experiment parameters: alcohol/oil ratio 15%(15g/100g), catalyst concentration 0.5 wt%, stirring speeds 500rpm, reaction temperature 70℃, reaction time 2 hours, the conductivity, pH value and transmittance of reactants were measured continuously during transesterification. The results revealed that transmittance could be taken as an indicator to estimate the conversion rate of fatty acid methylesters (FAME or biodiesel). The relationship between transmission coefficient and conversion rate of biodiesel can be described by y=0.125×ln (16990(subscript τ(subscript x))-6566.5) where y is the conversion rate of biodiesel and τx is the transmission coefficient of reactant defined within 0.409~0.522. This equation can be a reference for on-line monitor for biodiesel production.

並列關鍵字

Biodiesel ； Transesterification ； Transmission coefficient ； On-line monitor