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Efficient post-plasma catalytic degradation of toluene via series of Co–Cu/TiO2 catalysts

Ayub, K. S ; Sharif University of Technology | 2022

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  1. Type of Document: Article
  2. DOI: 10.1007/s11164-022-04805-7
  3. Publisher: Springer Science and Business Media B.V , 2022
  4. Abstract:
  5. Volatile organic compounds (VOCs) represent a very important class of pollutants that causes serious health effects. There is an urgent requirement to establish efficient technologies that can reduce and control VOCs. Non-thermal plasma (NTP) is an emerging technology that can decompose low concentration VOCs. However, the low efficiency and high power cost are major hindrances in its commercialization. In this work, Co–Cu with TiO2 support catalysts are prepared by using the deposition precipitation method and utilized in post-plasma catalysis for the efficient degradation of toluene selected as a model VOC. The synergistic effect of Co–Cu/TiO2 with different Co/Cu molar ratios along with pure Co/TiO2 and Cu/TiO2 catalysts are studied for their catalytic activity. Results showed that the degradation efficiency of toluene for the control experiments (plasma-alone) increased from 10 to 85% with the increase in input power from 11 to 44 W. In comparison, a significant improvement in the degradation efficiency is achieved with post-plasma catalysis owing to better physicochemical properties such as particle surface area and microstructures of the Co–Cu/TiO2 catalysts. The Co50–Cu50/TiO2 exhibited highest degradation efficiency of toluene, i.e. 55% being 5.5 times higher than control at lowest input power of 11 W while 96% at the highest input power of 44 W, attributed to interaction of Co and Cu species, adsorbed oxygen content, and redox properties by exchange of pairs Co+3/Co+2 and Cu+2/Co+3. In summary, the post-plasma catalysis integrated with Co50–Cu50/TiO2 catalyst rendered optimal outcomes in terms of power consumption and degradation of VOCs, envisioning commercial viability. Graphical abstract: [Figure not available: see fulltext.] © 2022, The Author(s), under exclusive licence to Springer Nature B.V
  6. Keywords:
  7. Non-thermal plasma (NTP) ; Ozone ; Post-plasma catalysis ; Toluene degradation ; Volatile organic compounds (VOCs) ; Biodegradation ; Catalysis ; Catalyst activity ; Efficiency ; Molar ratio ; Physicochemical properties ; Precipitation (chemical) ; Toluene ; Volatile organic compounds ; Degradation efficiency ; Non-thermal plasma ; Nonthermal plasma ; Plasma catalysis ; Post-plasma ; Post-plasma catalyse ; Toluene degradations ; Volatile organic compound ; [Co/Cu] ; ]+ catalyst ; Titanium dioxide
  8. Source: Research on Chemical Intermediates ; Volume 48, Issue 10 , 2022 , Pages 4227-4248 ; 09226168 (ISSN)
  9. URL: https://link.springer.com/article/10.1007/s11164-022-04805-7