TAILIEUCHUNG - Báo cáo vật lý: "Textural Characteristics of Activated Carbons Prepared from Oil Palm Shells Activated with ZnCl2 and Pyrolysis Under Nitrogen and Carbon Dioxide"

Tuyển tập các báo cáo nghiên cứu khoa học trên tạp chí khoa học vật lý quốc tế đề tài: Textural Characteristics of Activated Carbons Prepared from Oil Palm Shells Activated with ZnCl2 and Pyrolysis Under Nitrogen and Carbon Dioxide | Journal of Physical Science Vol. 19 2 93-104 2008 93 Textural Characteristics of Activated Carbons Prepared from Oil Palm Shells Activated with ZnCl2 and Pyrolysis Under Nitrogen and Carbon Dioxide Allwar Ahmad Bin Md Noor and Mohd Asri Bin Mohd Nawi School of Chemical Sciences Universiti Sains Malaysia 11800 USM Pulau Pinang Malaysia Corresponding author allwar@ Abstract The textural characteristics of activated carbon prepared from oil palm shells activated with zinc chloride ZnCl2 and pyrolysis under nitrogen and carbon dioxide were studied in this paper. The pyrolysis was carried out at different activation temperatures in the range of 400PC-800PC. The BET surface areas obtained were in the range of m2 gf1. The difference of values between micropore surface area and external surface area showed that the activated carbons were predominantly microporous adsorbents. The Dubinin-Astakhov D-A approach was used to study the pore size diameter of activated carbon. The pore size diameters of activated carbons obtained were in the range nm and the exponent n parameter in the range of to indicated predominantly micropores. The Dubinin-Radushkevich D-R method was used to evaluate the micropore volume of activated carbon. The micropore volumes found were in the range of cm3 g-1. The structural morphology and composition of activated carbons were evaluated by SEM-EDX. It was clearly seen that the activated carbons were full of cavities and some of Zn metals were still trapped at the surface of activated carbons. In general the heterogeneous and predominantly microporous activated carbon was produced. Keywords activated carbon nitrogen carbon dioxide activation impregnation zinc chloride 1. INTRODUCTION The two largest producer countries of palm oil in the world are Malaysia and Indonesia. In Malaysia oil palm shells containing high carbonaceous materials are generated in large quantity as a major by-product of .

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