YÜZEY YANIT METODU İLE OPTİMİZE EDİLEN METİL LAURAT ÜRETİMİNİN MEMBRAN REAKTÖRDE UYGULAMASI

Bu çalışmada,yüzey yanıt yöntemi kullanılarak laurik asit ve metanol arasındaki esterleşme reaksiyonunun Amberlit 36 katalizörü varlığında optimum operasyon koşulları verimi maksimize edecek şekilde belirlenmiştir. Laurik asit dönüşümüne sıcaklık (50 °C, 57.5 °C. 65 °C), alkol:asit molar besleme oranı (2:1, 4:1, 6:1), katalizör konsantrasyonunun (%1, %2, %3) etkileri belirlenmiş ve optimizasyon ile belirlenen noktada aynı reaksiyon membran reaktörde de gerçekleştirilmiştir. Polivinil alkol membranın kullanıldığı tek kademeli membran reaktörde elde edilen sonuç ile kesikli reaktörde elde edilen dönüşüm sonucu karşılaştırılmış ve membran reaktörün dönüşüme etkisi belirlenmiştir. Reaksiyonlar beş saat sürdürülmüştür. Hem parametrik hem de optimizasyon sonuçlarına göre katalizör oranının dönüşüme etkisinin düşük olduğu, sıcaklık ve molar besleme oranının ise asit dönüşümüne etkisinin yüksek olduğu görülmüştür. En yüksek dönüşüm değeri % 77 ile 65 °C sıcaklıkta, alkol:asit molar besleme oranı 6:1 iken, %3 katalizör oranı ile elde edilmiştir. Belirlenen bu koşullarda membran reaktör deneyinde ise dönüşüm değeri % 95 olarak elde edilmiştir. Membran reaktör kullanımı ile % 23 dönüşüm iyileştirilmesi gerçekleşmiştir.

Anahtar Kelimeler:

esterleşme, metil laurat sentezi, membran reaktör, reaktif ayırma

OPTIMIZATION OF METHYL LAURATE SYNTHESIS USING RESPONSE SURFACE METHODOLOGY AND MEMBRANE REACTOR APPLICATION

In this study, the reaction between lauric acid and methanol in the presence of Amberlyst 36 was optimized using response surface methodology to maximize the conversion of the reaction. Effect of temperature (50, 57,5, 65 °C), alcohol:acid molar ratio (2:1, 4:1, 6:1), catalyst concentration (%1, %2, %3) on acid conversion were determined and membrane reactor application was performed at optimized operation conditions. The results obtained in the batch and the membrane reactors were compared. Reactions were carried out for five hours. According to the numeric and optimization analysis, it was observed that while the effect of catalyst on conversion was not remarkable, the effects of temperature and initial molar ratio on conversion were significant. The highest conversions were obtained as 77 % and 95 % at the batch reactor and membrane reactor respectively when the molar ratio was 6:1, catalyst concentration was 3 % (wt.) at 65 °C. Optimization results also confirmed that the highest conversion obtained at higher conditions except of catalyst amount. At the given conditions, higher than 23 % conversion improvement was achieved by using the membrane reactor.

Keywords:

Experimental optimization methyl laurate production, membrane reactor, reactive separation, esterification,

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