Catalytic combustion of volatile organic compounds over Co/ZSM-5 coated on stainless steel fibers

[Display omitted] •A novel gradient porous Co/ZSM-5/PSSF catalyst was prepared.•The Co/ZSM-5/PSSF catalyst presents efficient activity for isopropanol oxidation.•Catalytic efficiency of Co/ZSM-5/PSSF is superior to granular Co/ZSM-5. Co/ZSM-5/PSSF (paper-like stainless steel fibers) catalyst was pre...

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Bibliographic Details
Published in:Chemical engineering journal (Lausanne, Switzerland : 1996) Switzerland : 1996), 2014-11, Vol.255, p.195-204
Main Authors: Yan, Ying, Wang, Ling, Zhang, Huiping
Format: Article
Language:English
Subjects:
Catalysis
Catalysts
Catalytic oxidation
Cobalt oxide
Isopropanol
Organic compounds
Scanning electron microscopy
Stainless steel fibers
Surface chemistry
X-ray photoelectron spectroscopy
X-rays
ZSM-5 zeolite membrane
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Summary:[Display omitted] •A novel gradient porous Co/ZSM-5/PSSF catalyst was prepared.•The Co/ZSM-5/PSSF catalyst presents efficient activity for isopropanol oxidation.•Catalytic efficiency of Co/ZSM-5/PSSF is superior to granular Co/ZSM-5. Co/ZSM-5/PSSF (paper-like stainless steel fibers) catalyst was prepared for the catalytic combustion of volatile organic compounds (isopropanol). The cobalt oxides modified ZSM-5/PSSF catalyst was synthesized by wet impregnation method, and the ZSM-5/PSSF was prepared via secondary growth method on the surface of PSSF supports which was made by wet lay-up papermaking method and sintering process. Characterization of all the samples was carried out by means of X-ray diffraction (XRD), scanning electron microscope (SEM), energy disperse X-ray spectrometer (EDS) mapping, X-ray photoelectron spectrum (XPS), N2 adsorption/desorption and H2-temperature programmed reduction (H2-TPR). The results of EDS demonstrated that cobalt oxides had a perfect dispersion on the surface of ZSM-5/PSSF. The performance of catalytic oxidation of single VOCs (isopropanol) was conducted over a zeolite membrane reactor based on Co/ZSM/PSSF catalysts, the experimental results showed that the 0.5M Co/ZSM-5/PSSF-500°C catalyst exhibited the best catalytic activity for isopropanol oxidation with 90% conversion of isopropanol at 222°C with the feed concentration of 4.5mg/L and GHSV of 7643h−1, which was much lower than that of granular Co/ZSM-5 catalyst (293°C). The special pore structure of ZSM-5/PSSF can offer a relatively higher contacting efficiency, lower diffusion resistance and reasonable mass/heat transfer efficiency.
ISSN:1385-8947
1873-3212
DOI:10.1016/j.cej.2014.05.141