Üçlü derin ötektik çözücülerin fıstık çamı kozalağının delignifikasyonuna etkisi

Öz

Uygun maliyetli olmaları ve çevre dostu doğaları nedeniyle derin ötektik çözücüler (DÖÇ), biyokütle dönüşümü ve yeşil kimyasalların üretimindeki uygulamalar için büyük potansiyele sahiptir. Bu çalışmada, Fıstık çamı (Pinus pinea L.) kozalaklarının delignifikasyonu yedi farklı üçlü derin ötektik çözücü (ÜDÖÇ) kullanılarak gerçekleştirildi. Fıstık çamı kozalağı örneklerinin ÜDÖÇ işlemleri mikrodalgada 150 °C'de 30 dakika süreyle gerçekleştirildi. ÜDÖÇ’lerin iki bazlı bileşenleri kolin klorür (ChCl - 1 mol) ve laktik asittir (LA - 9 mol). ÜDÖÇ’in üçüncü bileşeni olarak formik asit (FA – 2 mol), borik asit (BA – 1 mol), asetik asit (AA – 2 mol), sorbitol (S – 1 mol), trietilen glikol (TEG – 2 mol), etilen glikol (EG –2 mol) ve gliserol (G - 2 mol) kullanıldı. ChCl:LA:BA en düşük katı kalıntı verimini (%57,90) ve en yüksek lignin saflığını (%86,89) verdi. Kontrolün Klason lignin içeriği %35.08 idi. En düşük lignin içeriği (%19,42) ve en yüksek delignifikasyon (%68,89) ChCl:LA:FA işlemiyle elde edildi. En düşük ve en yüksek L* değerleri sırasıyla 21,76 ve 37,36 ile ChCl:LA:BA ve ChCl:LA:EG işlemlerinden elde edildi. Bu sonuçlar, ÜDÖÇ 'ün üçüncü bileşeninin fıstık çamı kozalağının delignifikasyon verimini etkilediğini göstermiştir.

Anahtar Kelimeler

• Delignifikasyon
• Lignin rengi
• Lignin saflığı
• Fıstık çamı
• ÜDÖÇ

Effect of ternary deep eutectic solvents on delignification of stone pine cone

Öz

Due to their cost-effectiveness and environmentally friendly nature, deep eutectic solvents (DESs) hold great potential for applications in biomass conversion and the production of green chemicals. In this study, the delignification of the stone pine (Pinus pinea L.) cone was performed using seven different ternary deep eutectic solvents (TDESs). TDES treatments of stone pine cone samples were carried out in a microwave for 30 min. at 150 °C. The two-based components of TDESs were choline chloride (ChCl - 1 mol) and lactic acid (LA - 9 mol). The formic acid (FA – 2 mol), boric acid (BA – 1 mol), acetic acid (AA – 2 mol), sorbitol (S – 1 mol), triethylene glycol (TEG – 2 mol), ethylene glycol (EG – 2 mol), and glycerol (G – 2 mol) were used as third component of TDES. ChCl:LA:BA gave the lowest solid residue yield (57.90%) and highest lignin purity (86.89%). Klason lignin content of control was 35.08%. The lowest lignin content (19.42%) and highest delignification (68.89%) were obtained with ChCl:LA:FA treatment. The lowest and the highest L* values were obtained from ChCl:LA:BA and ChCl:LA:EG treatments with 21.76 and 37.36, respectively. This results showed that the third component of TDES affects the delignification efficiency of stone pine cone.

Anahtar Kelimeler

• Delignification
• Lignin color
• Lignin purity
• Stone pine
• TDES

Kaynakça

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