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

Year 2019, Volume: 8 Issue: 1, 214 - 226, 12.03.2019

Derya Ünlü

https://doi.org/10.17798/bitlisfen.453633

Abstract

Biyodizelin yan ürünü olarak gliserol üretiminin
fazlalığı gliserolün değerlendirilmesi için araştırmacıları yeni ürün
arayışlarına itmiştir. Bu çalışmada biyo-türevli gliserol, tek bir adımda karbonizasyon
ve sülfonasyon yoluyla heterojen katı asit katalizör sentezi için bir karbon başlatıcısı
olarak kullanılmıştır. Üretilen katalizör, 
yakıt biyokatkı maddesi bütil levulinat sentezlemek üzere levulinik asit
ile bütanolün esterleşme reaksiyonunu katalizlemek için kullanılmıştır. Katalizör
karakterizasyonu; FTIR, TGA ve XRD cihazları kullanılarak yapılmıştır.
Katalizörün katalitik aktivitesini belirlemek için  deneyler farklı reaksiyon sıcaklıklarında,
farklı molar besleme oranlarında ve farklı katalizör yükleme oranlarında
kesikli reaktörde gerçekleştirilmiştir. En yüksek dönüşüm değeri 70^oC’de,
molar besleme oranı (alkol/asit) 9:1 kullanılarak ve %7 katalizör yükleme
oranında altı saatin sonunda %96.25 olarak elde edilmiştir. Katalizör esterleşme
reaksiyonunun polar ortamından zarar görmemektedir.  Bu nedenle, katalitik aktivitesini
kaybetmeden sekiz kez tekrar kullanılmıştır.

Keywords

Biyodizel, Bütil Levulinat, Gliserol, Karbon Katalizör, Levulinik Asit

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