Fundamental research on charcolizaion and burning of multiple wooden wastes

多种木质废弃物炭化燃烧基础研究

• 批准号: 12460075
• 负责人: ARIMA Takanori
• 金额: $ 7.81万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12460075/
• 关键词: Wood Charcoal; Gypsum board; Formaldehyde; High temperature TG-DTA; Demolished material; Pyrolysis; Absorption capability; Recycle; キチン

Wastes from demolished buildings and concrete-form work consist of various components. Charcoal of wood material is available from the process of burning of these mixed wastes. This study aimed to attach new functional property to the mixed wastes and investigate the wood charcoal carbonized by ultrahigh-temperature processing by two-step carbonization.Though the carbonization depends on the condition of atmosphere and temperatures, anatomical structure of wood is considerably maintained even at high temperature. Change of the crystal structure and adsorption property of formaldehyde are dependent on the carbonization temperature.Conical carbon material was formed by heating Japanese cedar charcoal at more than 2500℃ under Ar gas atmosphere. This newly found material has very different feature and thermal stability from known wood charcoals because of difference of the formation. The exothermal peak of 2500℃ treated charcoal, which includes conical carbon material, with DTA measurement … More under air is broader than those of known wood charcoals. This fact indicates that the region for oxidizing temperature is wide. Isolation of the conical carbon material from charred wood cell wall might be achieved by controlling oxidization temperature and time.Waste gypsum board of various hydrates was prepared by treating at various temperatures. The powdered gypsum board and wood charcoal was mixed with various ratios and reformed as boards and absorption and mechanical property were investigated. Powdered gypsum board treated at 500℃ was anhydrite. The hydration state was not changed by moisture condition and drying temperature. The moisture content of the mixed material increased with the increase of the ratio of wood charcoal. In the case of mixed wastes monitoring the process of combustion and charcoalization is at least necessary for application. For the modification into new materials two-step carbonization is useful because various volatile gases are generated during charcoalization process. Less

拆除的建筑物和混凝土模板工程中的废物由多种成分组成，可以从这些混合废物的燃烧过程中获得木炭本研究旨在为混合废物赋予新的功能特性并研究超高碳化的木炭。 - 两步碳化温度处理。尽管碳化取决于气氛和温度条件，但即使在高温下，木材的解剖结构也能得到相当程度的保持，晶体结构和甲醛吸附性能也发生变化。锥形碳材料是通过在Ar气气氛下将日本杉木炭加热至2500℃以上而形成的，由于其形成过程的不同，这种新发现的材料与已知的木炭具有非常不同的特性和热稳定性。 2500℃处理的木炭（包括锥形碳材料）在空气中的DTA测量的峰值比已知的木炭的峰值更宽，这一事实表明氧化区域。通过控制氧化温度和时间，可以实现锥形碳材料与烧焦木材细胞壁的分离。将粉状石膏板和木炭在不同温度下混合，制备出各种水合物的废石膏板。并考察了500℃处理后的粉状石膏板的吸水性和力学性能，其水化状态不因潮湿条件而改变。混合材料的水分含量随着木炭比例的增加而增加，在混合废物的情况下，监测燃烧和炭化过程至少对于改性成新材料是必要的。分步碳化是有用的，因为在木炭化过程中产生的各种挥发性气体较少。