Abstract Multi-component thermodynamic equilibrium predictions of coconut husk combustion products were performed in this work. The calculation results showed that the concentration of the chlorine species in the flue gas and ash were clearly influenced by the combustion temperature. At temperatures below 820oC the highest concentration was HCl(g), and above 820oC was KCl(g). Chlorine species were also observed in ash, as KCl–NaCl–RbCl solid solution (when the combustion temperature was lower than 700oC), and KCl–NaCl–K2SO4–Na2SO4 liquid solution (in the range of 600-960oC). At low combustion temperatures (600oC), chlorine retention in solid ash was the most effective. Speciation of inorganic gaseous species and condensed phases were investigated also during flue gas cooling from 1000 to 200oC. Major condensed phase compositions were dominated by alkali metal salts in both solid and liquid phase states. In addition, the Gibbs energy of substance formation, and Gibbs reaction energy, in order to thoroughly interpret the thermodynamic predictions were determined. Finally, thirty seven eutectic points for binary systems calculated in the “Phase Diagram” module of the FactSage package were presented. For the purposes of interpreting the results, the melting point ranking for pure substances and binary systems were created.

中文翻译：

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基于热力学平衡预测的椰子壳燃烧过程中无机气体物质和凝聚相的检测

摘要 本文对椰子壳燃烧产物进行了多组分热力学平衡预测。计算结果表明，烟气和灰分中氯物质的浓度明显受燃烧温度的影响。在低于 820oC 的温度下，最高浓度是 HCl(g)，高于 820oC 是 KCl(g)。在灰烬中也观察到氯物质，如 KCl–NaCl–RbCl 固溶体（燃烧温度低于 700oC 时）和 KCl–NaCl–K2SO4–Na2SO4 液体溶液（在 600-960oC 范围内）。在低燃烧温度 (600oC) 下，固体灰分中的氯保留最有效。在从 1000 到 200oC 的烟道气冷却过程中，还研究了无机气体物质和凝聚相的形态。主要的凝聚相组成以固相和液相状态的碱金属盐为主。此外，物质形成的吉布斯能，和吉布斯反应能，为了彻底解释热力学预测而确定。最后，介绍了在 FactSage 包的“相图”模块中计算的二元系统的 37 个共晶点。为了解释结果，创建了纯物质和二元系统的熔点排名。介绍了在 FactSage 包的“相图”模块中计算的二元系统的 37 个共晶点。为了解释结果，创建了纯物质和二元系统的熔点排名。介绍了在 FactSage 包的“相图”模块中计算的二元系统的 37 个共晶点。为了解释结果，创建了纯物质和二元系统的熔点排名。