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

从拆毁的建筑物和混凝土模板工程中产生的废物由各种成分组成。这些混合废物的燃烧过程中可获得木材的木炭。本研究旨在为混合废弃物赋予新的功能特性，并采用两步炭化法对超高温处理的木炭进行了研究，虽然炭化过程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很大程度的保持。炭化温度对炭化物的晶体结构和甲醛吸附性能的影响很大，在Ar气氛下，将日本雪松炭在2500℃以上加热，形成锥形炭材料。这种新发现的材料由于其形成过程的不同，具有与已知木炭截然不同的性质和热稳定性。用差热分析法测定了2500℃处理后的含锥状炭材料的膨胀峰 ...更多信息 在空气下比已知的木炭的那些更宽。这一事实表明，氧化温度的区域是宽的。通过控制氧化温度和时间，可以实现炭化木材细胞壁中锥形炭材料的分离，并在不同温度下处理，制备了不同水化产物的废石膏板。将粉状石膏板与木炭以不同比例混合后制成板材，研究其吸水性能和力学性能。经500℃处理的石膏粉板为硬石膏。水分条件和干燥温度不改变其水化状态。混合料的含水率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是应用所必需的。对于新材料的改性，两步炭化是有用的，因为在炭化过程中会产生各种挥发性气体。少