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The performance of manganese-based catalysts with Ce0.65Zr0.35O2 as support for catalytic oxidation of toluene
- Source :
- Applied Surface Science. 434:82-90
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- Mesoporous Ce0.65Zr0.35O2 composites are synthesized by co-precipitation method and a series of novel MnOx/Ce0.65Zr0.35O2 monolithic catalysts with different content of manganese oxides are prepared for toluene catalytic oxidation. The results show that the catalytic activity of Ce0.65Zr0.35O2 is promoted by introduction of manganese and influenced remarkably by the amount of MnOx. In particular, the catalyst with 15 wt.% MnOx loading performs best activity in view of the lowest complete conversion temperature of 250 °C at a GHSV of 12000 h−1. According to the characterizations of N2 adsorption-desorption, XRD, SEM-EDX, H2-TPR, O2-TPD and XPS analyses, the superior catalytic activity could be attributed to the well-dispersed MnOx species, good low-temperature redox property, more Mn4+ species and more available surface and lattice oxygen species. Additionally, the optimized catalyst shows high stability during the thermal aging experiment and long-term testing experiment, and it also shows a good activity under the condition of high gas hourly space velocity, which presents a well application prospect.
- Subjects :
- Materials science
Inorganic chemistry
General Physics and Astronomy
chemistry.chemical_element
02 engineering and technology
Surfaces and Interfaces
General Chemistry
Manganese
010402 general chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
Toluene
Redox
0104 chemical sciences
Surfaces, Coatings and Films
Catalysis
chemistry.chemical_compound
chemistry
Catalytic oxidation
X-ray photoelectron spectroscopy
0210 nano-technology
Mesoporous material
Space velocity
Subjects
Details
- ISSN :
- 01694332
- Volume :
- 434
- Database :
- OpenAIRE
- Journal :
- Applied Surface Science
- Accession number :
- edsair.doi...........557a07d71ebd318e356bf558672b69bf