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2 Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

2 2012

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Chemical composition of lignocellulose materials and porous structure of activated carbons

Babeł Krzysztof, Janasiak Dawid, Waliszewska Bogusława, Prądzyński Włodzimierz

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

2012

No. 77

33-40

Chemical composition of lignocellulose materials and porous structure of activated carbons.Chemical and elemental compositions of selected lignocellulose materials were determined and next a series of activated carbons was produced from these materials under strictlyrepeatable conditions. The chemical activation method (900 o C) using KOH (4:1) was applied for the development ofthe porous structure. Prior to activation all raw materials were subjected to pyrolysis at 700 o C using a slight temperature increase rate (3 o C/min). Produced activated carbons had varied porous structure parameters and considerable BET surface areas ranging from 2026 to 2884 m 2 /g. It was shown that the type of the applied precursor has a significant effect on the development of the porous structure.

Active carbons from lignocellulose materials as potential energy carriers

Babeł Krzysztof, Janasiak D., Jurewicz Krzysztof, Prądzyński Włodzimierz

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

2012

No. 77

41--50

Chemical and elemental composition of selected lignocellulose materials was determined and next the materials were used to produce a series of active carbons for electrochemical hydrogen adsorption under strictly repeatable conditions. Chemical activation (900 o C) with the application of KOH (4:1) was used for the development of the porous structure. Prior to activation all materials were pyrolysed at 700 o C applying a slight temperature increase rate (3 o C/min). Produced active carbons had diverse parameters of the porous structure and considerable BET surface areas ranging from 2178 to 2815 m 2 /g. Experiments showed feasibility of electrosorption of hydrogen on the surface of active carbons produced from commonly available, cheap and frequently waste lignocellulose materials. The type of the applied precursor has a significant effect on the development of the porous structure and hydrogen sorption. The highest hydrogen sorption value of Hc =1.91% weight and Hc =1.90% weight were obtained on AC from cherry stone shells and from oak wood.