Aktif Karbon Yapısında Hiyerarşik Gözenek Oluşumu için Aktifleştirici Ajan Olarak Bor Türevi Kullanımının Optimizasyonu

Hacer DOLAŞ

doi:10.5281/zenodo.13910893

Yazarlar

Hacer DOLAŞ Harran Üniversitesi, Hilvan Meslek Yüksekokulu, Mülkiyet Koruma ve Güvenlik Bölümü, Şanlıurfa https://orcid.org/0000-0002-8030-8560

DOI:

https://doi.org/10.5281/zenodo.13910893

Anahtar Kelimeler:

Zirai atıklar, aktif karbon, bor türevi kimyasallar

Özet

Bu çalışmada amonyum biborat, boraks ve borik asit gibi bor türevi kimyasalların zirai atık olan fıstık kabuklarından aktif karbon üretiminde aktif karbonun yapısında oluşan gözeneklerin boyut ve hacim dağılımına etkisi incelendi. Ayrıca, aktifleştirici ajan türü (ABB, Boraks, Borik asit); aktifleştirici ajan oranı (% 10, % 20, % 30, % 40 ve % 50), aktifleştirici ajan çözeltisinde bekletme süresi (1 gün, 2 gün, 3 gün, 4 gün ve 5 gün) ve karbonizasyon sıcaklığı (700 ^oC, 750 ^oC, 800 ^oC, 850 ^oC ve 900 ^oC) gibi üretim koşullarının bu dağılımdaki etkisi de incelendi. Elde edilen AC TG-DTA, FT-IR, SEM, BET yüzey alanı ve BJH gözenek hacmi, gözenek yüzey alanı, hacim dağılım ve gözenek çapı bakımından karakterize edildi. Elde edilen sonuçlara göre, ortalama 1.122 nm çaplı gözeneklerden 0.033 cc g^-1 hacim bulunduran fıstık kabukları borik asitle muamele sonucunda 7.255 ccg-1 hacimli 42.52 nm gözenek boyutuna sahip AC haline geldi. Mikro-mezo gözenek yüzey alanının 300 m²g^-1 ile en yüksek olduğu % 20 aktifleştirici ajan kullanımında görüldü. 2 gün bekletme neticesinde 60 nm düzeyine kadar gözenek boyutunda açılma gözlendi. Miktar ise 2.7 cc g^-1düzeyine çıktı. Elde edilen AC’lar 800 ^oC’de 10-15 nm aralığında 9 cc g^-1’lik bir hacim yoğunluğuna, 123 m² g^-1’lik yüzey alanına sahipken; 850 ^oC’de ise mikro- ve mezo-gözeneklilik hatta makro-gözeneklilik bakımından daha hiyerarşik bir yapı elde edildi. Sonuç olarak amonyum biborat kullanımıyla fıstık kabuklarından yüksek oranda mikro gözenek yoğunluklu AC elde edilirken, borik asit kullanımında hem mikro ve mezo- ve hem de makro- boyutta gözenekler elde edildi. Bunun yanında %20 oranında, 2 gün ve 850 ^oC’de üretim koşulları kullanılması bu hiyerarşiyi desteklediği görüldü.

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Aktif Karbon Yapısında Hiyerarşik Gözenek Oluşumu için Aktifleştirici Ajan Olarak Bor Türevi Kullanımının Optimizasyonu

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