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A Study on Pyrolytic and Anatomical Characteristics of Korean Softwood and Hardwood  

Kim, Dae-Young (College of Life Resource Science, Department of Forest Resources, Dongguk University)
Kang, Sung-Ho (College of Life Resource Science, Department of Forest Resources, Dongguk University)
Jeong, Heon-young (College of Life Resource Science, Department of Forest Resources, Dongguk University)
Publication Information
Journal of the Korean Wood Science and Technology / v.35, no.6, 2007 , pp. 31-42 More about this Journal
Abstract
To investigate the pyrolytic and anatomical characteristics of Korean softwood, Pinus densi-flora, Pinus rigida and Larix leptolepis, and hardwood, Acer palntatum, Fraxinus rhynchophylla and Quercus variabilis, chemical components analysis, TG-DTA (Thermogravimetric Analysis & Differential Thermal Analysis), MBA (Methylene Blue Adsorption) test and SEM observation were carried out. For TG-DTA, samples were carbonized up to $800^{\circ}C$ at the heating rate of $10^{\circ}C$/min under $N_2$ flows 1 l/min using thermogravimetric analyzer. Chemical component analysis of all samples resulted in typical contents of major wood component. In TG-DTA results, softwood showed higher char yield than hardwood, and lignin displayed the highest char yield among the major wood components. All samples showed typical TGA, DTG and DTA curves for wood pyrolysis except a few differences between softwood and hardwood. Content of lignin influenced its pyrolysis characteristics, while molecular structure of lignin affected not only the weight loss but also the yield of char. In MBA test results, MBA of softwoods was higher than that of hardwoods. Char of Pinus densiflora showed the highest MBA, but its degree was lower than activated carbon or fine charcoal about 23 and 4 times, respectively. SEM observation showed carbonization process preserves wood structure and retain the micro-structure of wood fibers.
Keywords
pyrolysis; carbonization; TGA; SEM;
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Times Cited By KSCI : 1  (Citation Analysis)
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