1. College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China 2. College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China
Abstract：By techniques of one-step and two-step carbonization, and capped and uncapped carbonization, the pyrolysis on the thinning wood of Chinese fir, one of the fastest growing tree species in south China, was carried out. With special focus on the variation of Raman spectra and X-ray diffraction analysis of carbonized materials under different carbonization conditions, comprehensive analyses of charcoals were conducted. Results show that, with temperature rising, the graphite-like microcrystal and carbon atoms at the edge of graphite-like microcrystal increase rapidly. As a result, the hexagon carbon plane structure in carbonized material keeps growing. Moreover, the experiments reveal that carbonization condition has great effects on the property and structure of carbonized material, and 700 ℃ is the critical temperature at which the qualitative change of carbonized material occurs. Furthermore, formation and growth of graphite-like microcrystal in carbonized material, two-step method is more beneficial than one-step method, uncapped container carbonization method is better than the capped one, and using air as atmosphere gas is better than using N2. Samples with longer holding time in the process of carbonization enjoy higher graphitization extent.
Key words：Charcoal;X-ray diffraction;Raman spectroscopy;Thinning wood of Chinese fir;Carbonization temperature
黄 彪1,陈学榕1,江茂生1,高尚愚2 . 不同炭化条件下炭化物的结构与性能表征[J]. 光谱学与光谱分析, 2006, 26(03): 455-459.
HUANG Biao1,CHEN Xue-rong1,JIANG Mao-sheng1,GAO Shang-yu2 . Structural and Property Characteristics of Chinese Fir Wood Charcoal Prepared under Various Conditions . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2006, 26(03): 455-459.
