The use of plastic in daily life is growing at expressive rates. Because of its inherent characteristics, such as chemical resistance and low biodegradability, plastic waste is already a global issue. Traditionally used methods for plastic conversion, such as incineration, cause some environmental concerns, besides not being economically attractive. Subcritical and supercritical water provide a strongly oxidant environment, which can deal with this waste by allowing the obtention of high added-value products from waste of synthetic polymers. These processes, when carefully optimized using chemometric methods, produce fuels, and even the initial monomers that can be used for polymer synthesis, reducing the direct demand for fossil raw materials in a circular economy approach.

日常生活中塑料的使用正以高表达率增长。由于其固有的特性，例如耐化学性和低生物降解性，塑料废料已经成为全球性问题。传统上用于塑料转化的方法，例如焚化，除了不具有经济吸引力外，还会引起一些环境方面的问题。亚临界和超临界水提供了强氧化剂环境，可以通过从合成聚合物废料中获得高附加值的产品来处理这种废料。当使用化学计量方法仔细优化这些过程时，会产生燃料，甚至可以用于聚合物合成的初始单体，从而以循环经济的方式减少了对化石原料的直接需求。