Aktif Karbon Üretiminde Yüksek Kükürtlü Kömürlerin Kullanılabilirliğinin Araştırılması

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.

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

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.

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[1]. S. Karaca, A. Gürses, R. Bayrak, “Investigation of applicability of the various adsorption models of methylene blue adsorption onto lignite water interface” Energy Conversion and Management, vol:46, 33-46, 2005
[2]. M. Ahmed, “Application of agricultural based activated carbon by microwave and conventional activations for basic dye adsorption review” Journal of Environmental Chemical Engineering, vol: 4, 89-99, 2016
[3]. Z. Hu, M.P. Srinivasan, Y. Ni, “Novel activation process for preparing highly microporous and mesoporous activated carbons” Carbon 39, 877–886, 2001
[4]. T. Kopac, and A. Toprak, “Preparation of activated carbons from Zonguldak region coal by physical and chemical activation for hydrogen sorption” International Journal of Hydrogen Energy, vol: 32, 5005-5014, 2007
[5]. B. Akashi, and W. O’Brain, “The preparation of activated carbon from a bituminous coal” Internatıonal Journal Of Energy Research, Vol. 20, pp913-922, 1996
[6]. T. Usmani, T. Ahmed, S. Ahmed, A. Yousufzai, “Preparation and characterization of activated carbon from a low rank coal” Carbon Vol. 34, No. 1, pp. 77-82, 1995
[7]. J.J. Pis, , A.C. Teresa, M. Mahamud, B.A. Fuertes, B.J. Parra, A.J. Pajares, R.C. Bansal, “Preparation of active carbon from coal Part I. Oxidation of coal” Fuel Processing Technology, vol 47, pp119-138,1996
[8]. Ç.Şentorun-Shalaby, M. Astarlıoğlu, L. Artok, Ç. Sarıcı, “Preparation and characterization of activated carbons by one-step steam pyrolysis/activation from apricot Stones” Microporous and Mesoporous Materials 88, 126–134, 2006
[9]. D. Çuhadaroğlu, O.A. Uygun, “Production and characterization of activated carbon from a bituminous coal by chemical activation“ African Journal of Biotechnology Vol. 7 (20), pp. 3703-3710
[10]. İ. Demiral, H. Demiral, “Surface characterization of activated carbons obtained from olive bagasse by chemical activation” Surface and Interface Analysis, vol. 40, 1347- 1350, 2010
[11]. Y. Qi, A. Hoadly, A.L. Chaffee, G. Garnier, “Characterization of lignite as an industrial adsorbent” Fuel, vol: 90, 1567-1574, 2011
[12]. A. Gürses, A. Hassani, M. Kıranşan, Ö. Acıslı, S. Karaca, “Removal of methylene blue from aqueous solution using by untreated lignite as potantial low cost adsorbent kinetic thermodynamic and equilibrium approach“ Journal of Water Process Engineering 2 10–21, 2014
[13]. S. Elbinsoy, “Yüksek kükürt içeren Kütahya-Gediz yöresi kömürlerinden aktif karbon üretilmesi ve özelliklerinin belirlenmesi” Dumlupınar Üniversitesi, Fen Bilimleri Enstitüsü, Yüksek Lisans Tezi, Kütahya, 2016
[14]. J. Wilson, “Activated carbon from coal”, Fuel, vol:60, pp823-831, 1981
[15]. E, Jorjani,. B. Rezai, M. Vossoughi, M. Osanloo, M. Abdollahi “Oxidation pretreatment for enhancing desulfurization of coal with sodium butoxide” Minerals Engineering, vol: 17, 545-552, 2004a
[16]. E. Jorjani, B. Rezai, M. Vossouhgi, M. Osanloo, “Desulfurization of Tabas coal with microwave irridation/peroxyacetic acid washing at 25, 55 and 85 oC” Fuel, vol: 83, 943-949, 2004b
[17]. E. Jorjani, J. Yperman, R. Carleer, B. Rezai ”Reductive pyrolysis study of sulfur compounds in different Tabas coal samples (Iran)” Fuel 85, pp 114–120, 2006
[18]. U. Demir, “Characterization and Desulfurization Possibilities of High Sulfur Gediz-Turkey Coal” Journal of Environmental Science and Engineering A, vol:6, Number 1, pp 31-38, 2017
[19]. U. Demir, A. Aydın, ”Desulfurization of high sulfur coal by Electron Transfer Method” XV. Mineral Processing Symposium, IMPS 2016, , Istanbul, Turkey, 2016
[20]. S.K. Kawatra, , ve T.C. Eisele, “Coal desulfurization, high-efficiency preparation methods”, Printed by Edwards Brothers, Ann Arbor, Taylor & Francis Inc. 349p. 2001
[21]. L.Y. Hsu, H. Teng, “Infuluence of different chemical reagent on the preparation of activated carbons from bituminous coal“ Fuel Processing Technology 64, 155–166, 2009
[22]. J. J.Pis, M. Mahamud, A.J. Pajares, B.J. Parra, R.C. Bansal, “Preparation of active carbon from coal Part III. Activation of char” Fuel Processing Technology, vol 57, pp149-161, 1998
[23]. K., S., E. Gergove, “Effects of activation method the pore structure of activated carbons from apricot stone” Carbon vol.34, 879-888, 1996
[24]. T. Bondosz, “Effects of pore structure and surface chemistry of virgin activated carbons on removal of hydrogen sulfide” Carbon, vol:37, 483-491, 1999
[25]. B. Döngel, “Zonguldak kömürlerinden aktif karbon üretimi” Zonguldak Karaelmas Üniversitesi, Fen Bilimleri Enst. Yüksek Lisans Tezi, Zonguldak, 1997
[26]. İ. Orbak, “Tunçbilek linyitlerinden kimyasal aktitivasyon yöntemi ile aktif karbon üretimi” İstanbul Teknik Üniversitesi, Fen Bilimleri Enst. Yüksek Lisans Tezi, İstanbul, 2002
[27]. A. Ahmadpour, D. Do, “The preparation of activated carbon from coal by chemical and physical activation “Carbon Vol. 34, No. 4, pp. 471-479. 1996
[28]. A.L. Solano, I.M. Gullon, C.S.M. Lecea, B.S. Talovera, “Activated Carbons from Bituminous Coal: Effect of Mineral Matter Content”. Fuel, 79: 635-643. 2000.
[29]. M. Jasienko, K. Kedzior, “Comparision of moleculer sieve properties in microporous chars from low rank bituminous coal activated by steam and carbon dioxide” Carbon, Vol:43, 944, 2005
[30]. J.J. Pis, M. Mahamud, B.J. Parra, A.J. Pajares, R.C. Bansal, “Preparation of active carbon from coal Part II. Carbonisation of oxidised coal” Fuel Processing Technology, vol 48, pp249-260, 1997