Pore structure of activated carbon prepared from hazelnut bagasse by chemical activation

In this study, hazelnut extracted-bagasse which is a waste from oil factory was used for the production of activated carbon by chemical activation using ZnCl 2 and KOH as activating agents. Hazelnut bagasse has been impregnated with aqueous solutions of ZnCl 2 and KOH in the ratio of 1-3 g agent per g precursor. The carbonization treatment was performed at 500, 600 and 700 °C for 2 h under nitrogen flow. The surface area, pore volumes, pore size distribution and average pore diameter of the activated carbons were characterized by N 2 adsorption at 77 K using the BET, t-plot and DFT methods. The highest surface areas of activated carbons are 1642 and 1489 m 2 /g and total pore volumes are 0.964 and 0.9329 cm 3 g -1 for KOH and ZnCl 2 , respectively. The surface chemical characteristics of activated carbon were determined in terms of surface functional groups. These groups were analyzed by Fourier transform infrared (FTIR) spectroscopic method and Boehm's titration method. Surface morphology was investigated by SEM. According to the results, activated carbons prepared from hazelnut bagasse by chemical activation have high surface area and porosity.

[1]  M. Srinivasan,et al.  A simple method for developing mesoporosity in activated carbon , 2000 .

[2]  H. Boehm.,et al.  Surface oxides on carbon and their analysis: a critical assessment , 2002 .

[3]  S. Şensöz,et al.  Fixed-Bed Pyrolysis of Hazelnut (Corylus Avellana L.) Bagasse: Influence of Pyrolysis Parameters on Product Yields , 2006 .

[4]  R. Tseng,et al.  Characterization and use of high surface area activated carbons prepared from cane pith for liquid-phase adsorption. , 2006, Journal of hazardous materials.

[5]  H. Teng,et al.  Influence of different chemical reagents on the preparation of activated carbons from bituminous coal , 2000 .

[6]  Qingrong Qian,et al.  Preparation of activated carbons from cattle-manure compost by zinc chloride activation. , 2007, Bioresource technology.

[7]  A. Watkinson,et al.  Preparation of activated carbon from lignin by chemical activation , 2000 .

[8]  A. A. El-Hendawy,et al.  Surface and adsorptive properties of carbons prepared from biomass , 2005 .

[9]  B. Girgis,et al.  Porosity development in activated carbons obtained from date pits under chemical activation with phosphoric acid , 2002 .

[10]  M. N. Biswas,et al.  Adsorption of phenol from aqueous solutions using activated carbons prepared from Tectona grandis sawdust by ZnCl2 activation , 2005 .

[11]  Feng-Chin Wu,et al.  Preparation of highly microporous carbons from fir wood by KOH activation for adsorption of dyes and phenols from water , 2005 .

[12]  Aik Chong Lua,et al.  Textural and chemical properties of zinc chloride activated carbons prepared from pistachio-nut shells , 2006 .

[13]  N. Tancredi,et al.  Activated carbon briquettes from biomass materials. , 2007, Bioresource technology.

[14]  Y. Onal,et al.  Textural development of sugar beet bagasse activated with ZnCl2. , 2007, Journal of hazardous materials.

[15]  M. Molina-Sabio,et al.  Modification of the porous structure along the preparation of activated carbon monoliths with H3PO4 and ZnCl2 , 2007 .

[16]  S. Ismadji,et al.  High surface area activated carbon prepared from cassava peel by chemical activation. , 2006, Bioresource technology.