Research and Development of Carbon-Based Materials for Environment Clean-Up from Wood Wastes by Thermal Conversion

为开发利用木材疏料、木材工业残渣和废弃物、林业废弃物和未利用树种的新型功能材料，开展了利用木材废弃物的木炭进行热转化环境净化的碳基材料的研究与开发。开发了新的堆场系统、疏林系统和木结构建筑解构废弃物收集系统以及木材工业废弃物和残留物收集系统。一种新的碳化系统也在开发中。研究了在氮气或氩气的作用下，在60 ~ 2800ºC的温度范围内炭化糖薄木炭的特性。随着炭化温度的升高，木材炭的电导率、导热率和吸附性能发生了很大的变化。探讨了炭化温度与木炭光催化反应的关系。研究了利用杉木炭材料吸附不同浓度水溶液中汞、锌、铬、砷、镉、铅等重金属的可能性。探讨了炭化温度对污水中汞、锌、铅、铬、镉和砷选择性吸附的影响。考察和讨论了木炭和木炭与金属氧化物的碳基复合材料去除NOx或将其转化为无害气体的方法。本文还考察和讨论了活性炭吸附相下异丙醇作为有机清洗液在电气设备工业和精密机械工业中的吸附性能。利用木材废弃物的木炭制备新型碳基用于环境净化的可能性正在研究和开发中。

In order to develop newly functional materials utilizing wood thinnings, residues and wastes from wood industries, forestry wastes and unused wood species, research and development studies on carbon-based materials for environmental clean-up from charcoal of wood wastes by thermal conversion. New yarding systems of thinnings and gathering systems of wastes from deconstruction of wood building and of wastes and residues from wood industries are developed. A new carbonization system is also development.Characteristics of wood charcoals of sugi thinnings carbonized at a temperature range of 60ﾟC to 2800ﾟC under N_2 or Ar gas flow is done. Electric conductivity, thermal conductivity and properties of adsorption of wood charcoal are drastically changed with a rise in carbonization temperature. Relationships between carbonization temperature and photo catalytic reactions of wood charcoal are examined and discussed. The possibility of utilizing charcoal materials from sugi for adsorbing heavy metals like Hg, Zn, Cr, As, Cd and Pb from aqueous solutions of different concentrations are researched. Relationships of carbonization temperature to the selective adsorption of Hg, Zn, Pb, Cr, Cd and As from a polluted water are found and discussed. Removal of NOx or its conversion into harmless gases by charcoals and carbon-based composites of charcoals and metal oxides are examined and discussed. Adsorption of isopropyl alcohol as an organic cleaning solution under charcoal adsorbance phases for the electric divices industries and precision machinery industries is also examined and discussed. The possibility of newly carbon-based from charcoals of wood wastes for environment clean-up is researching and developing.