冷冻处理对日本柳杉边材炭化的影响

将冷冻处理前后的日本柳杉边材在 4 0 0℃下进行炭化 ,得到了木醋液、木焦油和木炭。与没有处理相比 ,虽然处理过边材的木焦油的收率几乎不变 ,木醋液的收率显示增加倾向 ,但是木炭的收率有减少迹象。用毛细管气相色谱法对得到的木醋液中的 11种成分进行了定量分析。与无处理相比较后 ,发现处理过边材木醋液中的甲醇、脂肪酸及糠醛 (呋喃甲醛 )的收量有了变化 ,但是 5 -羟甲基糠醛、麦芽酚、苯酚、邻苯二酚及愈创苯酚的收量几乎没有变化。

Effect of Pretreatment with Freezhing on Carbonization of Sugi ( Cryptomeria japonica ) Sapwood

Sugi sapwoods at different moisture content after and before freezing treatment were carbonized at 400 ℃ to afford wood-vinegar, wood-tar and charcoal. Yield of wood-vinegar prepared from the treated wood tended to increase, and yield of charcoal indicated opposite tendency, but yield of wood-tar was almost constant. 11 components in wood-vinegar obtained from the Sugi sapwoods after and before treatment were determined by capillary gas chromatography (capillary GC). The change in amounts of methanol, carboxylic acids and 2 - furaldehyde in wood-vinegar from the treated sapwood was observed, but amounts of 5 - hydroxymethyl - 2 - furaldehyde, maltol, phenols, pyrocatechol, and guaiacols were almost constant.