- Note
- Published:
Measurement of the refining degree of bamboo charcoal by an alternating current method
Journal of Wood Science volume 57, pages 155–160 (2011)
Abstract
We investigated a method for measuring the refining degree of bamboo charcoal using an alternating current. The bamboo charcoal was made under heating conditions of 400°–900°C (set temperature) and 0—3 h (holding time at each set temperature). The qualities of the bamboo charcoal could not be estimated from the yield, and electric tests were required. The effect of the variation in sample thickness on the impedance could be ignored. Attaching two plate electrodes to the same surface of a specimen enabled high accuracy and practical use. The impedance was found to be a suitable index for estimating the refining degree of the bamboo charcoal, such as the specific electric resistance. We believe that bamboo changes from an insulator to a conductor suddenly when processed at 600°–750°C for 0–2 h. It is possible that the integral of temperature with time in a specimen during heating is useful for approximately estimating impedance.
References
Kishimoto S (1953) Studies on charcoal making (The 3rd report). Studies on the refining in charcoal making in Japan — especially on the relation between electric resistance and refining degree of charcoal. Bull Gov For Exp Stn 65:135–217
Kishimoto S, Furuya T, Unrinin G (1951) On the decision of qualities of charcoal by the electric resistance. J Jpn For Soc 33:144–146
Shinmura T, Nishimoto K, Miyahara H, Ikemoto S (1998) Study on carbonization of pine wood. Rep Kagoshima Prefect Inst Ind Technol 12:41–45
Kawaguchi E, Kobayashi R (2003) Characteristics and functions of bamboo charcoal carbonized at different temperature — Effects of carbonizing temperature on reduction of residual chlorine, ammonia, and volatile organic compounds (VOC). Bull Kagoshima Prefect For Exp Stn 8:12–16
Suzuki Y (2005) Evaluation of moisture content of wood by electrical measurement. Wood Ind 60:483–488
Sugimoto H, Norimoto M (2003) Dielectric relaxation of heattreated wood. J Soc Mat Sci Jpn 52:362–367
Sugimoto H, Norimoto M (2004) Dielectric relaxation due to interfacial polarization for heat-treated wood. Carbon 42:211–218
Sugimoto H, Norimoto M (2005) Dielectric relaxation due to the heterogeneous structure of wood charcoal. J Wood Sci 51:554–558
Sugimoto H, Kanayama K, Norimoto M (2007) Dielectric relaxation of water absorbed on wood and charcoal. Holzforschung 61:89–94
Kamihara S (ed) (1957) Polymer experimental series 4: polymer physics II. Kyoritsu Syuppan, Tokyo, pp 149–172
Japanese Industrial Standard (1994) JIS K 7194. Testing method for resistivity of conductive plastics with a four-point probe array. JSA, Tokyo
Forestry and Forest Products Research Institute (2004) Wood Industry Handbook. Maruzen, Tokyo, p 1013
Hitomi M, Kera Y, Tatsumoto H, Abe I, Kawafune I, Ikuta N (1993) Evaluation of adsorption property of porous carbon materials (III): preparation of charcoals from Cryptomeria and Chamaecyparis and their properties. TANSO 160:247–254
Ishihara S (1996) Recent trend of advanced carbon materials from wood charcoals. Mokuzai Gakkaishi 42:717–723
Author information
Authors and Affiliations
Corresponding author
Additional information
This research was presented in part at the 57th Annual Meeting of the Japan Wood Research Society in Hiroshima, August 2007, the 58th Annual Meeting of the Japan Wood Research Society in Tsukuba, March 2008, and the 59th Annual Meeting of the Japan Wood Research Society in Matsumoto, March 2009
Rights and permissions
About this article
Cite this article
Kubojima, Y., Suzuki, Y. Measurement of the refining degree of bamboo charcoal by an alternating current method. J Wood Sci 57, 155–160 (2011). https://doi.org/10.1007/s10086-010-1152-z
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10086-010-1152-z