利用離子交換樹脂吸附移除植物油中的游離脂肪酸

Removal of free fatty acid (FFA) from vegetable oil by adsorption with ion-exchange resin (IER)

吳亦翎(Yi-Ling Wu)

指導教授 ： 鍾財王

中原大學/工學院/化學工程研究所/碩士(2016年)

https://doi.org/10.6840/cycu201600483

摘要

本研究利用商業化離子交換樹脂A26 OH與IRA900 Cl作為吸附劑，應用於植物油精製程序的脫酸步驟中，在無添加溶劑的條件下，吸附移除市售花生油中的游離脂肪酸，而使用A26 OH能較有效移除油品中的游離脂肪酸。
　　另外，本研究描繪了使用離子交換樹脂A26 OH進行吸附移除花生油中的游離脂肪酸，分別在25、35、45℃下之等溫吸附曲線，發現了在各種溫度下吸附皆較符合Langmuir等溫吸附模型之描述。
　　利用回應曲面法進行吸附條件最佳化實驗中發現，吸附劑投入量是對於游離脂肪酸移除率、游離脂肪酸總移除量以及游離脂肪酸吸附量，皆有最顯著影響的因子，因此吸附劑投入量是對於吸附結果影響最大也最全面的，而吸附溫度是影響最不具顯著性的。欲求最大游離脂肪酸移除率，本研究建議使用的吸附條件為吸附溫度25 ℃、花生油初始酸價3 mg KOH/ g、吸附劑投入量5 wt %的離子交換樹脂A26 OH，游離脂肪酸移除率可達近90%。選用吸附溫度較低為25℃，可在室溫下進行，不需額外給予能量可以降低成本，且對環境較為友善。

關鍵字

吸附劑 ； 脫酸 ； 等溫吸附

並列摘要

In this study, the use of commercial ion exchange resins (IER) A26 OH and IRA900Cl as adsorbents in deacidification step for refining process of vegetable oil without adding solvents. As an adsorbent, A26 OH performs better than IRA900 Cl, to remove free fatty acids (FFAs) from oil effectively.
　　In addition, this study presents the adsorption isotherms of IER A26 OH as an adsorbent to remove FFA from vegetable oil under 25, 35, and 45 ℃, and both fitting for Langmuir isotherm model and Freundlich isotherm model. We found that Langmuir isotherm model is preferred to fit the adsorption isotherms.
　　The use of response surface methodology to optimize the conditions of adsorption found that the adsorbent dosage is the most significant factor and adsorption temperature is the least significant factor for the FFA removal percentage, total removed FFA and FFA adsorption capacity. In order to promote FFA removal percentage, this study suggests that the adsorption for peanut oil with initial acid value 3 mg KOH / g under temperature 25 ℃ by adding 5 wt% IER A26 OH dosage, the FFA removal percentage was nearly 90%. Adsorption carried out at room temperature (25℃) without additional energy is more environment-friendly and either decreases the cost.

並列關鍵字

adsorbent ； deacidification ； isotherm

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