摘要
采用不同炭化工艺对杉木木屑进行热解,用拉曼光谱、X射线衍射技术对炭化物的微晶结构进行研究,揭示了其中的演变规律与形成特点。研究表明炭化条件对炭化物石墨化程度、微晶结构等影响较大,700℃是关键的炭化温度。从炭化物的石墨状微晶的形成与生长来看,二步炭化法比一步法好;不加盖炭化法比加盖法好;氛围气为空气的比氮气好;保温时间长的试样石墨化程度高。
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.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2006年第3期455-459,共5页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金(30371140)
福建省自然科学基金(E0310024)资助项目
关键词
炭化物
X射线衍射
拉曼光谱
杉木间伐材
炭化温度
Charcoal
X-ray diffraction
Raman spectroscopy
Thinning wood of Chinese fir
Carbonization temperature
