Dahili Membran Reaktörde Kullanılmak Üzere Yüksek Performanslı Polivinil Alkol Membran Üretimi ve Etanol-Propiyonik Asit Esterleşme Reaksiyonunda Uygulaması

Year 2018, Volume: 22 Issue: 2, 1095 - 1103, 15.08.2018

Filiz Uğur Nigiz

Abstract

Bu çalışmada, tek basamaklı reaktif ayırmanın yapıldığı bir membran reaktörde kullanılmak üzere yüksek dayanıma ve su tutma kapasitesine sahip çapraz bağlı polivinil alkol (PVA) membranı üretilmiş ve modül olarak kesikli reaktörde kullanılmıştır. Etanol ve propiyonik asit arasında Amberlit IR120 katalizörü eşliğinde gerçekleşen esterleşme reaksiyonunda membran modül eklenen kesikli reaktör ve klasik kesikli reaktörün asit dönüşüm sonuçları karşılaştırılmış, membranın klasik kesikli sistemde yaptığı dönüşüm iyileştirmesi değerlendirilmiştir. Reaksiyon sıcaklığının (50, 60, 70°C), katalizör miktarının (asit kütlesine göre %1, 2, 3) ve alkol:asit reaktan besleme oranının (M=1, 2, 3) her iki reaktördeki dönüşüme etkisi belirlenerek en iyi koşullar belirlenmiştir. Sonuç olarak membranın modül olarak eklendiği, sürekli ayırma yapmadığı ve suyu sorpladığı membran modüllü reaktörde klasik reaktöre göre %24-48 oranlarında dönüşüm iyileştirilmesi gerçekleştirilmiştir. En yüksek dönüşüm değeri ise 70°C sıcaklıkta ve M=3 besleme oranında modül kullanılan reaktörde %74 olarak elde edilmiştir.

Keywords

Esterleşme, Reaktif ayırma; Polivinil alkol membran; Membran reaktör

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