Non-isothermal pyrolysis and gasification of Enteromorpha prolifera (also known as Ulva prolifera) under a CO2 atmosphere were investigated by thermogravimetry analysis. The gaseous products were measured online with Fourier transform infrared spectroscopy coupled with thermogravimetry. The kinetic parameters of pyrolysis and gasification reactions were obtained using the Coats–Redfern method. The experimental results showed that Enteromorpha prolifera had two derivative thermogravimetry peaks centered at 240 and 800°C, indicating the pyrolysis of organics and gasification of char, respectively. Carboxylic acids, ethers, and alcohols were the dominating condensable products generated from pyrolysis between 230 and 300°C. H2O, CH4, and aliphatic hydrocarbons were also formed in this temperature range, and they were also continuously released at higher temperatures, indicating further polymerization of the freshly generated pyrolytic char. CO was mainly produced between 700 and 900°C, and its yield was much higher than that of the pyrolytic gaseous products. The Ginstling equation (the D4 model) proved to be the most probable mechanism function for both the pyrolysis and gasification stages, with activation energies of 138.30 and 93.43 kJ mol−1, respectively.

中文翻译：

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使用热重-傅里叶变换红外光谱技术在 CO2 气氛下热解和气化大型藻类浒苔

通过热重分析研究了浒苔（也称为椴树）在 CO2 气氛下的非等温热解和气化。气态产物通过傅里叶变换红外光谱结合热重法在线测量。使用 Coats-Redfern 方法获得热解和气化反应的动力学参数。实验结果表明，浒苔有两个衍生的热重峰，分别集中在 240 和 800 ℃，分别表明有机物的热解和炭的气化。羧酸、醚和醇是在 230 到 300°C 之间热解产生的主要可冷凝产物。在这个温度范围内也形成了 H2O、CH4 和脂肪烃，它们也在更高的温度下持续释放，表明新生成的热解炭进一步聚合。CO主要在700～900℃之间产生，其产率远高于热解气态产物。Ginstling 方程（D4 模型）被证明是热解和气化阶段最可能的机制函数，活化能分别为 138.30 和 93.43 kJ mol-1。