麦草浆黑液固形物热解特性及动力学研究

通过热重分析实验和固定床热解实验研究了麦草碱性亚硫酸钠-蒽醌法制纸桨黑液固形物的热解特性和热解产物分布。结果表明:黑液固形物热解过程分为干燥脱水、有机物热解和无机物转化三个阶段,主要失重发生在200～550℃间;在热重分析基础上按一级反应动力学模型得到了黑液固形物热解各阶段的动力学参数;实验条件下,麦草浆黑液固形物固定床热解后约三分之一转化为挥发分,余下为固体残渣。

Characteristics and Dynamics of Pyrolysis of Wheat Straw Black Liquor Solids

Pyrolysis characteristics of black liquor solids from wheat straw alkaline sulfite -anthraquinone process were investigated by TGA. The yield distribution was also tested in fixed bed pyrolysis apparatus. Results showed that pyrolysis process of black liquor solids was mainly composed of three stages, including dehydration, organic matters pyrolysis and inorganic matters conversion. Main weight loss happened between 200℃ and 550℃. Based on TGA, simplified as a first-order reaction, kinetic parameter was obtained during pyrolysis process. Under the experimental condition, one third volatile was yielded during pyrolysis of black liquor solids from wheat straw pulping in the fixed bed pyrolysis apparatus, and other was solid residue.