Abstract Activity of calcined scallop shell (CSS) for the catalytic pyrolysis of wasted fishing net (WFN) to the e-caprolactam monomer was investigated in a micro-furnace type temperature programmable pyrolyzer combined with a gas chromatography/mass spectrometry (Py-GC/MS) analysis system. Evolved gas analysis (EGA/MS) indicates that the peak temperature for the decomposition of WFN in the absence of catalysts was around 420−480 °C whereas the temperature decreased down to 380−420 °C in the presence of CSS or commercial CaO catalysts. The yield of e-caprolactam reached 66 wt.% in a catalytic depolymerization condition at 410 °C for 2 min with a 1:5 WFN/CSS weight ratio by using the Py-GC/MS system. Based on these experimental results, CSS should be an alternative catalyst for the recovery of the e-caprolactam monomer from the WFN.

中文翻译：

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在煅烧扇贝壳上对废弃渔网进行催化热解：分析 Py-GC/MS 研究

摘要 在微炉型温度可编程热解器中结合气相色谱/质谱 (Py-GC/Py-GC) 研究了煅烧扇贝壳 (CSS) 对废弃渔网 (WFN) 催化热解为ε-己内酰胺单体的活性。 MS) 分析系统。逸出气体分析 (EGA/MS) 表明，在没有催化剂的情况下，WFN 分解的峰值温度约为 420-480 °C，而在 CSS 或商业 CaO 催化剂存在的情况下，温度下降至 380-420 °C . 通过使用 Py-GC/MS 系统，在 410°C 下催化解聚 2 分钟，WFN/CSS 重量比为 1:5，ε-己内酰胺的产率达到 66 wt.%。基于这些实验结果，CSS 应该是从 WFN 中回收ε-己内酰胺单体的替代催化剂。