Biyodizel Yan Ürünü Olan Gliserolden Üretilen Katalizör ile Yakıt Katkı Maddesi Bütil Levulinat Sentezi

Biyodizelin yan ürünü olarak gliserol üretiminin fazlalığı gliserolün değerlendirilmesi için araştırmacıları yeniürün arayışlarına itmiştir. Bu çalışmada biyo-türevli gliserol, tek bir adımda karbonizasyon ve sülfonasyon yoluylaheterojen katı asit katalizör sentezi için bir karbon başlatıcısı olarak kullanılmıştır. Üretilen katalizör, yakıtbiyokatkı maddesi bütil levulinat sentezlemek üzere levulinik asit ile bütanolün esterleşme reaksiyonunukatalizlemek için kullanılmıştır. Katalizör karakterizasyonu; FTIR, TGA ve XRD cihazları kullanılarakyapılmıştır. Katalizörün katalitik aktivitesini belirlemek için deneyler farklı reaksiyon sıcaklıklarında, farklı molarbesleme oranlarında ve farklı katalizör yükleme oranlarında kesikli reaktörde gerçekleştirilmiştir. En yüksekdönüşüm değeri 70oC’de, molar besleme oranı (alkol/asit) 9:1 kullanılarak ve %7 katalizör yükleme oranında altısaatin sonunda %96.25 olarak elde edilmiştir. Katalizör esterleşme reaksiyonunun polar ortamından zarargörmemektedir. Bu nedenle, katalitik aktivitesini kaybetmeden sekiz kez tekrar kullanılmıştır.

Synthesis of Fuel Additive Butyl Levulinate by Biodiesel Byproduct Glycerol Derived Catalyst

Researchers search of new products for the consumption of the excess glycerol which is produced as byproduct of biodiesel. In this study, bio-derived glycerol was used as a carbon precursor for heterogeneous solid acid catalyst synthesis via partial sulphonation and carbonization in a single step. The as-produced catalyst was used to catalyze levulinic acid esterification reaction with butanol to synthesize fuel bioadditive butyl levulinate. Catalyst characterization was carried out by using FTIR, TGA and XRD equipments. Experiments were conducted at different reaction temperatures, different molar feed ratios, and different catalyst loading ratios in a batch reactor for determination of the catalytic activity of the catalyst. The highest conversion value was obtained as 96.25% for 6 h while the reaction conditions are reaction temperature of 70 oC, molar feed ratio of (alcohol/acid) 9:1, catalyst concentration of 7 wt.%. The catalyst does not damage in polar reaction medium. For this reason, it was reused eight times without losing catalytic activity.

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