Sarıçam Odununun Derin Ötektik Çözücü Muamelesi Üzerine Muamele Süresinin Etkisi

Yıl 2024, Cilt: 24 Sayı: 1, 48 - 58, 03.04.2024

Sezgin Koray Gülsoy , Ayben Kilic

https://doi.org/10.17475/kastorman.1460439

Öz

Çalışmanın amacı: Bu çalışmada, sarıçam (Pinus sylvestris L.) odununun derin ötektik çözücü (DÖÇ) muamele süresinin (1 saat, 2 saat ve 3 saat) etkileri araştırılmıştır.
Çalışma alanı: Çalışma Türkiye’deki Bartın ilinde gerçekleştirilmiştir.
Materyal ve yöntem: DÖÇ (kolin klorür (ChCl) ve laktik asit (LA)) muameleleri, 121 °C'de bir otoklavda gerçekleştirilmiştir. DÖÇ muamelesinin sarıçam odununun ve ligninin özellikleri üzerine etkileri ilgili standartlara göre belirlenmiştir.
Temel sonuçlar: 3 saat muamele edilmiş numunede delignifikasyon oranı, lignin saflığı ve lignin verimi sırasıyla %79,78, %86,43 ve %82,48 olarak belirlenmiştir. Kİ, 3 saat DÖÇ muamelesi ile %55,87'den %71,58'e yükselmiştir. 3 saat DÖÇ ile muamele edilmiş örneğin lignin saflığı, lignin verimi ve delignifikasyon oranı sırasıyla %86,43, %82,48 ve %79,78 olarak tespit edilmiştir. Brunauer-Emmett-Teller (BET) analiz sonuçları, numunenin yüzey alanının 3 saatlik DÖÇ muamelesi ile arttığını (3,095 m2/g'den 3,621 m2/g'ye) göstermiştir. 1 saat DÖÇ ile muamele edilmiş numune en açık renkli lignini vermiştir (L*: 71,62).
Araştırma vurguları: Sarıçam odununun DÖÇ muamelesi sırasında muamele süresi, odun ve lignin özellikleri üzerinde önemli etkilere sahiptir.

Anahtar Kelimeler

Derin Ötektik Çözücü, Lignin, Sarıçam, Kristallik Indisi, XRD, BET, Biyorafineri

Effect of Treatment Time on Deep Eutectic Solvent Treatment of Scots Pine Wood

Öz

Aim of study: The influence of the treatment time (1 hour, 2 hours, and 3 hours) on the deep eutectic solvent (DES) treatment of Scots pine (Pinus sylvestris L.) wood is investigated in this study.
Area of the study: Determination of DES performance on the Scots pine wood chemical structure.
Material and methods: Choline chloride (ChCl) and lactic acid (LA) mixture with molar ratio of 1:10 (w:w) was used as a DES solvent. Treatments were carried out in an autoclave at 121 °C. The effects of DES treatment on the properties of wood and lignin samples of Scots pine were determined according to the relevant standards.
Main results: The delignification ratio, lignin purity, and lignin yield in the 3h-treated sample were determined to be 79.78%, 86.43%, and 82.48%, respectively. The crystallinity index (CrI) was increased from 55.87% to 71.58% with 3 h DES treatment. Brunauer-Emmett-Teller (BET) analysis results showed that the surface area of the sample increased with 3-h DES treatment (from 3.095 m2/g to 3.621 m2/g). The 1-hour DES-treated sample yielded the lightest colored lignin (L*: 71.62).
Research highlights: Treatment time of Scots pine wood during DES treatment has a significant effect on the wood and lignin properties

Anahtar Kelimeler

Deep Eutectic Solvent, Lignin, Scots pine, Crystallinity Index, XRD, BET, Biorefinery

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