Catalytic pyrolysis of wasted fishing net over calcined scallop shells: Analytical Py-GC/MS study

Publication date: Available online 6 December 2019Source: Journal of Analytical and Applied PyrolysisAuthor(s): Nichaboon Chaihad, Irwan Kurnia, Akihiro Yoshida, Chuichi Watanabe, Koji Tei, Prasert Reubroycharoen, Yutaka Kasai, Abuliti Abudula, Guoqing GuanAbstractActivity of calcined scallop shell (CSS) for the catalytic pyrolysis of wasted fishing net (WFN) to the ε-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 ε-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 ε-caprolactam monomer from the WFN.Graphical Abstract

Source: Journal of Analytical and Applied Pyrolysis - December 7, 2019 Category: Chemistry Source Type: research