Journal
CHEMICAL ENGINEERING JOURNAL
Volume 331, Issue -, Pages 425-434Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2017.08.110
Keywords
Toluene catalytic combustion; CeO2; Hierarchical structure; Surface oxygen vacancies
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Funding
- National Natural Science Fund of China [51478241, 21325731]
- National High-Tech Research and the Development (863) Program of China [2015AA034603]
- Public Projects Foundation of China Ministry of Environmental Protection [201509021, 201509012]
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The catalytic oxidation of toluene has been investigated over pure CeO2 hierarchical catalyst for the first time. The novel CeO2 catalyst was prepared by a hydrothermal-driven assembly method. The structure of CeO2 catalyst was consisted of nanowire self-assembled hierarchical microspheres. The new hierarchical CeO2 catalyst showed much better catalytic activity than analogous nonporous catalyst by traditional hydrothermal method. The hierarchical CeO2 catalyst could reach more than 90% toluene conversion even as low as 210 degrees C (T-90) under a high space velocity of 60,000 mL/(g.h). The high catalytic activities could be attributed to the large surface areas, in addition, the hierarchical porous structures provide more contents of surface oxygen vacancies for the dissociation of gaseous O-2 on the surface.
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