Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Effect of Water Vapor on Ozone-Induced Lean Methane Oxidation Using Cobalt-Exchanged BEA Catalysts

  • So Min Jin (Department of Chemical Engineering, Kangwon National University) ;
  • Dae-Won Lee (Department of Chemical Engineering, Kangwon National University)
  • Received : 2024.07.15
  • Accepted : 2024.09.19
  • Published : 2024.11.01
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Abstract

In response to the threats of global warming and climate change, the development of highly energy-efficient lean methane oxidation processes has become crucial. One promising technology is ozone-induced lean methane oxidation (O3-LMO), which utilizes ozone as an oxidant and a transition metal-loaded zeolite as a catalyst. Our previous study demonstrated that the O3-LMO system, employing a cobalt-exchanged BEA (Co-BEA) catalyst, effectively abates lean methane (500 ppm) at low temperatures below 200℃ under dry conditions. In this study, we investigated the effect of water vapors on the performance of Co-BEA-based O3-LMO system. The results indicated that CH4 conversion, CO2 selectivity, and O3 utilization efficiency of the system were not significantly affected by water vapors. Additionally, any temporary suppression of activity could be easily reversed through simple vacuum drying of the catalyst. The system maintained robust activity for over 18 hours during prolonged testing under wet conditions.

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