聚乙烯醇（polyvinyl alcohol, PVA）塑料制品来源于可降解防护用品，该制品已在田湾核电、徐大堡核电站试点应用，预计未来核电站将产生大量污染PVA制品。通过高温蒸汽气化实验台架，对PVA开展了高温蒸汽气化实验研究，并利用红外光谱技术对热解产物进行分析，探讨了催化剂和水蒸气对PVA气化反应的影响。实验表明，PVA热解在501 ℃以上已基本完成，产物主要分为固体残留物、蜡状产物与挥发组分，催化剂和水蒸气能促进PVA初步热解，并促进热解产物的进一步降解，从而改变不同热解产物的占比。

PVA (polyvinyl alcohol) plastic products, derived from biodegradable protective materials, have been piloted in the Tianwan Nuclear Power Plant and Xudabao Nuclear Power Station. It is anticipated that nuclear power plants will generate a substantial amount of contaminated PVA waste in the future. High-temperature steam gasification of PVA was investigated using an experimental gasification setup, and the pyrolysis products were analyzed via infrared spectroscopy. The effects of catalysts and steam on PVA gasification were systematically explored. Experimental results indicate that PVA pyrolysis is essentially completed above 501 ℃, yielding three primary products: solid residue, waxy products, and volatile components. Both catalysts and steam are found to enhance the initial pyrolysis of PVA and promote the subsequent degradation of pyrolysis products, thereby altering the proportional distribution of different product fractions.