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<p>Plastics waste ends up in landfills, oceans and incinerators, posing major environmental and human health threats. Catalytic deconstruction is emerging as a key technological solution to handle complex plastics and has successfully converted virgin polymers into various products. Here we investigate the resilience of chemical deconstruction technologies to organic additives, which are ubiquitous in plastics. We study catalyst–additive interactions experimentally and via first-principles calculations for plastics additives representative of entire classes. We reveal two deactivation mechanisms and demonstrate that most recently developed catalysts are inadequate for polyolefin conversion due to poisoning caused by the strong adsorption of many additives or their small fragments. We also identify conditions and catalysts that can circumvent the challenge of deconstruction in the presence of additives.</p><p></p>

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Catalytic deconstruction of organic additive-containing plastics

  • 期刊论文

  • 发表日期：

    2025年2月26日

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  • Jacqueline Ngu,
  • Sean Najmi,
  • Esun Selvam,
  • Brandon Vance,
  • Piaoping Yang,
  • Dionisios G. Vlachos

摘要

Plastics waste ends up in landfills, oceans and incinerators, posing major environmental and human health threats. Catalytic deconstruction is emerging as a key technological solution to handle complex plastics and has successfully converted virgin polymers into various products. Here we investigate the resilience of chemical deconstruction technologies to organic additives, which are ubiquitous in plastics. We study catalyst–additive interactions experimentally and via first-principles calculations for plastics additives representative of entire classes. We reveal two deactivation mechanisms and demonstrate that most recently developed catalysts are inadequate for polyolefin conversion due to poisoning caused by the strong adsorption of many additives or their small fragments. We also identify conditions and catalysts that can circumvent the challenge of deconstruction in the presence of additives.