Fındık küspesi ve kahve atığından aktif karbon üretimi ve karakterizasyonu

Öz

Aktif karbon, çok geniş kullanım alanına sahip, gözenekli karbonlu bir malzemedir. Doğal ve tarımsal kaynaklardan elde edilen aktif karbonlar daha düşük maliyetli ve sürdürülebilirdir. Bu nedenle biyokütleden sentezlenen aktif karbonlar üzerine yapılan çalışmalar artmıştır. Bu çalışmada, fındık küspesi ve atık kahve telvesi gibi atık olarak nitelendirilen kaynakların aktif karbon olarak değerlendirilmesi hedeflenmiştir. Fındık küspesi ve kahve atığından, ZnCl2 kimyasal aktivasyonu ile 2:1, 3:1 emdirme oranlarında ve 400°C, 500°C, 600°C karbonizasyon sıcaklıklarında aktif karbon üretilmiştir. Aktif karbonların yüzey özelliklerini belirlemek üzere BET, SEM-EDS ve FTIR analizleri gerçekleştirilmiştir. Fındık küspesinden elde edilen aktif karbonlarda en yüksek yüzey alanı 846 m2/g olarak 3:1 emdirme oranında ve 500°C sıcaklıkta elde edilmiştir. En büyük toplam gözenek hacmi ise 0.645 cm3/g olarak elde edilmiştir. Atık kahveden elde edilen aktif karbonlarda ise en yüksek yüzey alanı 747.5 m2/g olarak 3:1 emdirme oranında ve 500 °C sıcaklıkta elde edilmiştir.

Anahtar Kelimeler

• Fındık Küspesi
• Kahve Atığı
• Kimyasal Aktivasyon
• Aktif Karbon

Activated carbon production and characterization from hazelnut bagasse and coffee waste

Öz

Activated carbon is a porous material with a wide range of applications. Activated carbons derived from natural and agricultural sources are more cost effective and sustainable. Therefore, studies on activated carbons synthesized from biomass have increased. The aim of this study was to utilize waste resources such as hazelnut meal and waste coffee grounds as activated carbon. Activated carbons with impregnation ratios of 2:1, 3:1 and carbonization temperatures of 400°C, 500°C, 600°C were prepared from hazelnut bagasse and coffee waste by chemical activation with ZnCl2. BET, SEM-EDS and FTIR analyses were performed to determine the surface properties of the activated carbons. The highest surface area of 846 m2/g was obtained in activated carbons obtained from hazelnut bagasse at 3:1 impregnation ratio and 500°C temperature. The largest total pore volume was obtained as 0.645 cm3/g. The highest surface area of 747.5 m2/g was obtained for the coffee waste activated carbons at 3:1 impregnation ratio and 500 °C temperature.

Anahtar Kelimeler

• Hazelnut Bagasse
• Waste Coffee
• Chemical Activation
• Activated Carbon

Kaynakça

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