氧气含量对竹材炭化特性的影响  

Impact of Oxygen Content on Carbonization Characteristics of Bamboo

作　　者：吴志威[1] 潘一凡[1] 王美玲[2] 周飞[3] 

机构地区：[1]南京林业大学机电学院,南京210037 [2]南京航空航天大学材料科学与技术学院,南京210016 [3]南京航空航天大学高新技术研究院,南京210016

出　　处：《森林工程》2012年第2期18-21,25,共5页Forest Engineering

基　　金：江苏省高校研究生创新计划(CX08S-005Z);江苏省自然科学基金重点项目(BK2010074)

摘　　要：竹材炭化过程中,炭化温度和炭化时间是两个十分重要的工艺参数,同时炉内的氧气含量对竹材炭化也会产生较大影响。通过传感器实时测定并控制炉内氧分压,研究炉内氧含量对竹材炭化的影响。结果表明,随着炉内氧分压增加,得炭率下降。用电子显微镜和能谱仪分析观察竹炭的微观结构和残留物成份,揭示竹炭蜂窝状的微观结构;随着炉内氧分压增加,竹炭孔径变大,表明炭化过程中氧含量影响竹材炭化过程中细胞的收缩。Carbonization temperature and time are two essential parameters during bamboo carbonization, and the oxygen content in the furnace also has a greater impact on bamboo carbonization. In this paper, the oxygen partial pressure was controlled and tested by measurement sensors in real time. And the impact of furnace oxygen content on bamboo charcoal was studied. Results show that char yield was decreased with the increasing of the oxygen partial pressure in furnace. The microstructure and composition of the bam- boo charcoal were analyzed and observed by field-emission scanning electronic microscope and energy dispersive spectroscopy, which revealed the microscopic structure of bamboo charcoal honeycomb. The average diameter of holes inside of bamboo charcoal becomes larger with the increasing of oxygen partial pressure in furnace, showing that the cell contraction are influenced by the oxygen partial pressure.

关 键 词：竹炭 得炭率 氧含量 微观结构 

分 类 号：S791.247[农业科学—林木遗传育种]