Characterization of Pyrolyzed Cedar (Cryptomeria japonica D. Don) Bark using N sub(2) Adsorption and Diffuse Reflectance Infrared Fourier Transform Spectroscopy

Japanese cedar bark was pyrolyzed at 473-1273 K under atmospheric pressure in a flow of nitrogen. Morphology, adsorption properties, and surface properties of the products were examined to characterize the pyrolyzed cedar bark. Although elongated tubular cells and fibrous materials in the bark shran...

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Bibliographic Details
Published in:INTERNATIONAL JOURNAL OF THE SOCIETY OF MATERIALS ENGINEERING FOR RESOURCES 2015-11, Vol.12 (2), p.39-44
Main Authors: Shindo, Takayoshi, Kudo, Hirotaka, Kitabayashi, Shigeaki, Ozawa, Sentaro
Format: Article
Language:English
Subjects:
Adsorption
Bark
Cedar
Diffusion
Morphology
Reflectance
Surface chemistry
Surface properties
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Summary:Japanese cedar bark was pyrolyzed at 473-1273 K under atmospheric pressure in a flow of nitrogen. Morphology, adsorption properties, and surface properties of the products were examined to characterize the pyrolyzed cedar bark. Although elongated tubular cells and fibrous materials in the bark shrank during the heat treatment, features of fibrous cedar bark were macroscopically preserved in the samples pyrolyzed even at higher temperatures without significant decay of the morphology. The development of microporosity was observed for the samples pyrolyzed at 773 K and higher temperatures; S sub(BET) (specific surface area) 80-448 m super(2)g super(-1), V sub(p), (pore volume) 0.07-0.21 mLg super(-1), and D sub(p), (mean pore diameter) 0.46-0.77 nm. alpha sub(s)-plot indicated that surface properties of cedar bark pyrolyzed at 1073-1273 K were similar to those of carbon black, whereas those of samples pyrolyzed at 873 K and lower temperatures were different from them. Diffuse reflectance FT-IR spectra showed that functional groups such as substituted aromatic rings and ether groups were present on the surface of the samples pyrolyzed below 873 K, which would have effects on the surface properties of the resultant material
ISSN:1347-9725
DOI:10.5188/ijsmer.12.39