利用離子交換樹脂移除植物油中游離脂肪酸之動態吸附研究

Kinetic adsorption study for deacidification of vegetable oils using ion-exchange resins

10.6840/cycu201700519

許君瑋

吸附 ； 貫流曲線 ； 脫酸 ； adsorption ； breakthrough curve deacidification

中原大學化學工程學系學位論文

2017年

碩士

鍾財王

繁體中文

本篇研究探討使用商業化離子交換樹脂Amberlyst A26(OH)應用於植物油精製程序的脫酸步驟中，在不添加溶劑的條件下，進行連續式填充床吸附植物油中游離脂肪酸之實驗。研究中，針對填充床之床高、進料流速以及油品之初始酸價對游離脂肪酸移除效率、樹脂利用效率、樹脂吸附能力以及游離脂肪酸總移除量之影響進行評估。 對於離子交換樹脂填充床之質傳性能可以從貫流曲線的趨勢了解到，當床高愈高、流速越慢、油品初始酸價越低時，貫流曲線越靠近原點、斜率越陡且更迅速地達到平衡，具有較佳的游離脂肪酸移除率。 使用回應曲面法進行的吸附條件最佳化實驗中發現，床高對於樹脂利用效率、游離脂肪酸移除效率與總移除量皆有顯著影響；流速對於游離脂肪酸移除效率與樹脂利用效率有顯著影響；而初始酸價則對於樹脂吸附能力、游離脂肪酸移除效率與總移除量有顯著影響。欲求最大游離脂肪酸移除效率，本研究建議於填充床床高7cm、進料流速4ml/min與油品初始酸價為6.5mgKOH/g的條件下進行，其結果可達0.97。透過回應曲面法迴歸模型來描述離子交換樹脂填充床吸附游離脂肪酸之模式，極小的P-value與趨近於1的R2值皆說明了回應曲面法迴歸之模型能夠適切地表示實驗數據的變化情形。

In this study, the commercial ion exchange resin Amberlyst A26 (OH) were used in the deacidification step of vegetable oil refining procedures. The FFA in vegetable oil was removed by continuious packed bed without adding solvent. The effect of FFA removal efficiency, resin utilization efficiency, resin adsorption capability and the total amount of FFA removal were evaluated for the bed height, feed flow rate and initial acid value of the oil. For the ion exchange resin, the mass transfer performance of the packed bed can be known from the trend of the breakthrough curve. When the bed height is higher and the feed flow rate is slower and the initial acid value of the oil is lower, the breakthrough curve is closer the origin ,more steep and faster to achieve equilibrium, with a better efficiency of FFA removal. The effect of bed height on resin utilization efficiency, FFA removal efficiency and the total amount of FFA removal was significant. The effect of feed flow rate was significant for FFA removal efficiency and resin utilization efficiency. And the initial acid value has a significant effect on the resin adsorption capacity, FFA removal efficiency and the total amount of FFA removal. The maximum FFA removal efficiency is expected, and this study is recommended to be carried out at a bed height of 7 cm, a feed rate of 4 ml / min and an initial acid value of 6.5 mg KOH / g.The model of the free fatty acid adsorbed by the ion exchange resin packed bed is described by the response surface regression model. The minimal P value and the R2 value close to 1, indicate that the model of the response surface method can accurately show the change of the experimental data.

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