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Abstract

In this study, hydroxyapatite (HAP) was prepared by using the co-precipitation method and used as a catalyst support material. 25 % KOH loaded HAP catalyst was prepared by wet-impregnation method and basicity of synthesized catalyst was found to be 1.6 mmol/g. Synthesized solid basic catalyst was tested for the soybean oil transesterification with methanol at different reaction temperatures (25-65°C) and different alcohol/oil molar ratios (6/1-15/1) when catalyst amount of 3 wt.% and reaction time of 5 h were kept constant. The chemical structure and purity of the fatty acid methyl esters obtained in this study was verified by the ATR-IR spectroscopy method. Methyl ester yield of 93.3% was obtained by using KOH loaded HAP solid basic catalyst which was found to be very successful catalyst

Keywords

• Hydroxyapatite, biodiesel, soybean oil, transesterification

SOYA YAĞI METİL ESTERLERİN ÜRETİMİ İÇİN BAZİK HETEROJEN KATALİZÖR TASARIMI

Abstract

Bu çalışmada, hidroksiapatit (HAP) katalizör destek malzemesi olarak birlikte çöktürme yöntemine göre hazırlandı. %25 potasyum hidroksit (KOH) HAP destek malzemesine ıslak emdirme yöntemi ile yüklenerek yapının bazikliği 1,6 mmol/g olarak bulundu. Elde edilen katı bazik katalizör soya yağının metanol ile transesterleşme tepkimesinden biyodizel (yağ asidi metil esterleri) üretimi için farklı sıcaklık aralığında (25-65°C) ve farklı alkol/yağ oranında (6/1-15/1) kütlece %3 katalizör miktarında 5 saat süre ile test edildi. Elde edilen soya yağ asidi metil esterlerinin saflığı ve yapısı ATR-IR spektroskopisi doğrulandı. KOH yüklenen HAP bazik katı katalizörü soya yağının transesterleşme tepkimesinde %93,3 metil ester verimi vererek oldukça başarılı bulundu.

Keywords

• Hidroksiapatit, biyodizel, soya yağı, transesterleşme.

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