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<p>Abatement of industrial emissions of nitrous oxide (N<sub>2</sub>O), a potent greenhouse gas and stratospheric ozone-depleting substance, offers a viable approach to urgent climate mitigation. However, existing N<sub>2</sub>O abatement processes require rigorous conditions ( &gt; 400 °C) due to its inertia and high costs. Here we present a cost-effective technology enabling 99.99% N<sub>2</sub>O conversion at 150 °C and a high reaction rate of 9629.55 kg<sub>N2O</sub> kg<sub>Pt</sub><sup>−1</sup> h<sup>−1</sup> using CH<sub>4</sub> as a reductant on Pt/HZSM-5. Mechanism studies reveal the key to this success lies in the reaction-induced Pt nanoparticles, which host monoatomic adsorbed oxygen species and achieve a rapid O* formation/consumption cycle. Techno-economic analysis shows that it offers the potential to reduce N<sub>2</sub>O abatement costs by 62.3% for industrial adipic acid emissions in China. The study can incentivize further technical development and improve the sustainability of N<sub>2</sub>O abatement, as well as low-temperature CH<sub>4</sub> activation.</p>

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Cost-effective abatement of industrial sources of nitrous oxide with methane for urgent climate mitigation

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年7月24日

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  • Yunshuo Wu,
  • Rongrong Hong,
  • Xuanhao Wu,
  • Feng-Shou Xiao,
  • Haiqiang Wang,
  • Zhongbiao Wu

摘要

Abatement of industrial emissions of nitrous oxide (N2O), a potent greenhouse gas and stratospheric ozone-depleting substance, offers a viable approach to urgent climate mitigation. However, existing N2O abatement processes require rigorous conditions ( > 400 °C) due to its inertia and high costs. Here we present a cost-effective technology enabling 99.99% N2O conversion at 150 °C and a high reaction rate of 9629.55 kgN2O kgPt−1 h−1 using CH4 as a reductant on Pt/HZSM-5. Mechanism studies reveal the key to this success lies in the reaction-induced Pt nanoparticles, which host monoatomic adsorbed oxygen species and achieve a rapid O* formation/consumption cycle. Techno-economic analysis shows that it offers the potential to reduce N2O abatement costs by 62.3% for industrial adipic acid emissions in China. The study can incentivize further technical development and improve the sustainability of N2O abatement, as well as low-temperature CH4 activation.