Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 203, Issue -, Pages 851-858Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcatb.2016.10.076
Keywords
Magnesium sulfite; Oxidation; Kinetics; Carbon nanotube; Catalyst
Funding
- National Natural Science Foundation of China [51378204]
- National Key Research and Development Program of China [2016YFC0204100]
- Natural Science Foundation of Hebei Province [E2016502096]
Ask authors/readers for more resources
Oxidation of magnesium sulfite is crucial for recycling the byproduct in magnesia desulfurization. Using impregnation method, a multiwalled carbon nanotube catalyst loaded with cobalt was prepared to promote the oxidation rate of magnesium sulfite (MgSO3). The performance of catalysts impregnated by different concentration of Co(NO3)(2) were compared, which showed that the optimal impregnating concentration was 30%. The catalysts prepared with various concentration of Co(NO3)(2) were characterized by Brunauer-Emmett-Teller analysis, transmission electron microscopy, scanning electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The catalyzed oxidation kinetics of magnesium sulfite was investigated in a bubbling tank, indicating that the general reaction orders with respect to carbon nanotube, oxygen, and magnesium sulfite were 0.22, 0.45, and 0.01, respectively. The apparent activation energy was 23.43 kJ mol(-1). The three-phases reaction model revealed that the internal diffusion of oxygen might be the rate-controlling step of magnesium sulphite oxidation. The results can serve as a useful reference for designing sulfite oxidation by using multiwalled carbon nanotube catalyst. (C) 2016 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available