Biomass has been attracting attention as an environmentally friendly energy resource due to concerns about global environmental problems. Chromated copper arsenate-treated wood produced by injecting a solution containing sub-percent of chromium, copper, and arsenic (hereinafter referred to as CCA-treated wood) is one of the construction wastes. As fundamental research on the development of clean gasification process for biomass, pyrolysis (400–800 °C) which is the initial stage of gasification and CO₂ gasification (1000 °C, 0–60 min) characteristics of CCA-treated wood were investigated. The release behavior of high-volatile arsenic during pyrolysis and gasification of CCA-treated wood was followed. When the CCA-treated wood was pyrolyzed, the release of arsenic proceeded with increasing temperature and the release extent was 41% at 800 °C. In the case of gasification, the release extent of arsenic increased with gasification time and 90% of the arsenic was released into gas phase within 60 min. Furthermore, it was possible to suppress the release of arsenic by 800 °C during pyrolysis by mixing organic sludge rich in iron and calcium with CCA-treated wood.

由于对全球环境问题的关注，生物质作为一种环境友好型能源一直受到关注。通过注入含铬，铜和砷含量不足的溶液制成的经铬酸砷酸铜处理的木材（以下称为CCA处理的木材）是建筑废料之一。作为发展生物质清洁气化工艺的基础研究，热解（400–800°C）是气化和CO ₂的初始阶段研究了CCA处理过的木材的气化（1000°C，0-60分钟）特性。遵循了高挥发性砷在CCA处理过的木材的热解和气化过程中的释放行为。将CCA处理过的木材热解后，砷的释放随温度的升高而进行，在800°C时的释放程度为41％。在气化的情况下，砷的释放程度随气化时间的增加而增加，并且90％的砷在60分钟内释放到气相中。此外，通过将富含铁和钙的有机污泥与CCA处理过的木材混合，可以在热解过程中在800°C抑制砷的释放。