Investigation of the Usability of High Sulfur Coal in Activated Carbon Production

Abstract

Activated carbon was especially produced from wood, lignite, organic agricultural wastes such as coconut shale.  In this study, high sulfur contained coal was used as a precursor to production of activated carbon. In the activated carbon production, physical activation method was applied and several operation parameters such as activation temperature (350-950 ^oC), activation time (5-120 min.) and particle size of coal samples (0,25-2 mm) were investigated. High sulfur contained coal samples has 56 m²/gr BET surface area. Produced activated carbons at optimum conditions have 485 m²/gr and 510 m²/gr BET surface areas in any gas inherent media and N₂ gas media, respectively. Furthermore, abilities of removal of Cu²⁺ ions from solution of produced activated carbons were investigated. In both operation conditions, approximately 97% Cu²⁺ ions in solutions can be removed.  As a result, it was determined that high sulfur coals caused environmental problems can be used in non-fuel areas.

Keywords

• Activated carbon,coal,sulfur,physical activation method

Aktif Karbon Üretiminde Yüksek Kükürtlü Kömürlerin Kullanılabilirliğinin Araştırılması

Abstract

Aktif karbon, genellikle odun, kömür,  Hindistan cevizi kabuğu gibi çeşitli zirai atıklardan üretilmektedir. Bu çalışmada, aktif karbon üretilmesi için hammadde olarak yüksek oranda kükürt içeren kömür kullanılmıştır. Aktif karbon üretiminde fiziksel aktivasyon yöntemi uygulanmış, bu yöntemde etkili olan aktivasyon sıcaklığı (350-950 ^oC), aktivasyon süresi (5-120 dakika), tane boyut (0,25-2 mm) gibi değişkenlerin etkileri araştırılmıştır. Aktif karbon üretiminde hammadde olarak kullanılan kömür numunesinin BET yüzey alanı 56 m²/gr iken en uygun çalışma şartlarında herhangi bir gaz girişinin olmadığı işlemde elde edilen aktif karbonun BET yüzey alanı 485 m²/gr ve inert bir gaz olan N₂ ile yapılan işlem ile elde edilen aktif karbonun BET yüzey alanı 510 m²/gr olarak ölçülmüştür. Ayrıca elde edilen aktif karbonun çözeltiden Cu²⁺ iyonlarını uzaklaştırma kabiliyetleri incelenmiştir. Her iki çalışma şartlarında çözeltideki Cu²⁺ iyonlarının yaklaşık %97’si uzaklaştırılabilmiştir. Yapılan bu çalışma ile çevresel sorun oluşturan yüksek oranda kükürt içeren kömürlerin yakıt dışı alanlarda kullanılabileceği belirlenmiştir.

Keywords

• Aktif karbon,kömür,kükürt,fiziksel aktivasyon yöntem

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