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对商陆茎的木质素、纤维素、灰分、钾元素等主要化学成分进行了分析.结果表明,野生商陆茎的全钾含量高达4.58%,木质素和纤维素含量比其他木质原料低,与秸秆类植物相当.利用热重-差热分析仪(TG-DTA)对商陆茎的热失重和热解特性进行了研究,分析了商陆茎热解炭化的机理.发现,商陆茎主要的热失重区间在200~400℃之间,控制这一失重阶段是商陆茎热解炭化的关键.在N2气氛中,热解温度为1 000℃时商陆茎热解炭化后的固定碳含量为19%.此研究结果为进行商陆茎生物质转化研究和活性炭制备的可行性提供依据.
The chemical composition of lignin, cellulose, ash, potassium and other main chemical components of Populus alba was analyzed.The results showed that the total potassium content of Populus davidiana was up to 4.58%, the contents of lignin and cellulose were lower than other woody materials, Which is comparable to that of straw plants.The thermogravimetric-differential thermal analysis (TG-DTA) was used to study the thermogravimetric properties The main weight loss range is between 200 ℃ and 400 ℃, controlling the stage of weightlessness is the key to the pyrolysis of Pseudostellaria spp. In N 2 atmosphere, the pyrolysis temperature is 1 000 ℃, Carbon content of 19% .The results of this study provide the basis for the feasibility study on the transformation of Pseudostellaria sinicus biomass and the preparation of activated carbon.