Scholarlink

<p>Efficient recycling of real-world polylactic acid (PLA) plastics is hindered by challenges such as the separation of products from impurities and additives, as well as the sluggish hydrolysis of PLA at ambient temperature. In this study, we introduce an integrated approach combining light-driven photothermal depolymerization and reforming to overcome these limitations. Taking advantage of this approach, commercial PLA granules are almost completely converted into easily separable H<sub>2</sub> (20.7 mmol/g<sub>sub</sub>), CO (6.9 mmol/g<sub>sub</sub>), and CH<sub>4</sub> (8.2 mmol/g<sub>sub</sub>) over a Pt/TiO<sub>2</sub> catalyst, with CO<sub>2</sub> (14.5 mmol/g<sub>sub</sub>) as the primary by-product. Controlled experiments demonstrated that decarboxylation and photoreforming reactions would be the dominant process for H<sub>2</sub> and such gaseous C<sub>1</sub> products production by means of acetaldehyde and acetic acid as key reaction intermediates. Moreover, the photothermal recycling system exhibits excellent performance towards real-world PLA cutlery and straws, highlighting its broad applicability and practical potential. This work presents a sustainable and efficient solution for recycling real-world PLA plastics into high-demand and easily separable H<sub>2</sub> and gaseous C<sub>1</sub> products.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Photothermal recycling of polylactic acid into H2 and gaseous C1 products via cooperative depolymerization and reforming

  • 期刊论文

  • 发表日期：

    2025年4月21日

查看全文
  • Yingxuan Miao,
  • Yunlong Wang,
  • Chaoran Jiang,
  • Yunxuan Zhao,
  • Tierui Zhang

摘要

Efficient recycling of real-world polylactic acid (PLA) plastics is hindered by challenges such as the separation of products from impurities and additives, as well as the sluggish hydrolysis of PLA at ambient temperature. In this study, we introduce an integrated approach combining light-driven photothermal depolymerization and reforming to overcome these limitations. Taking advantage of this approach, commercial PLA granules are almost completely converted into easily separable H2 (20.7 mmol/gsub), CO (6.9 mmol/gsub), and CH4 (8.2 mmol/gsub) over a Pt/TiO2 catalyst, with CO2 (14.5 mmol/gsub) as the primary by-product. Controlled experiments demonstrated that decarboxylation and photoreforming reactions would be the dominant process for H2 and such gaseous C1 products production by means of acetaldehyde and acetic acid as key reaction intermediates. Moreover, the photothermal recycling system exhibits excellent performance towards real-world PLA cutlery and straws, highlighting its broad applicability and practical potential. This work presents a sustainable and efficient solution for recycling real-world PLA plastics into high-demand and easily separable H2 and gaseous C1 products.