Development of Safe Gasification Process of Waste Wood Containing Heavy Metals

由于用含重金属防腐剂处理过的废弃木材中含有重金属，如果不采取适当措施处理，可能会造成环境污染或生态系统的破坏。在本研究中，利用CCA防腐剂处理的废木材作为能源的热回收利用被认为是安全的气化过程的发展是本研究的目标。而大部分的铜和铬仍然在残渣中，砷蒸发到气相气化显着和蒸发砷的分数随温度的增加。在较低的温度下气化废木材或添加适当的材料来稳定气化残渣中的砷是重要的。

Since the waste wood treated by preservatives containing heavy metals contains heavy metals, it may cause the environmental pollution or destruction of ecological systems if waste wood is treated without appropriate measures. In the present study, the utilization of waste wood treated by CCA preservative as an energy source by thermal recycling is considered and thus development of safe gasification process is the target of this study. While most of copper and chromium remains in the residue, arsenic vaporized to gas phase by gasification considerably and the fraction of vaporized arsenic increased with temperature. It is important to gasify waste wood at lower temperature or to add proper materials to stabilize arsenic in the gasification residue.