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Copper-modified zeolites and silica for conversion of methane to methanol

Wang, Xueting ; Martin, Natalia M. LU ; Nilsson, Johan ; Carlson, Stefan LU ; Gustafson, Johan LU ; Skoglundh, Magnus and Carlsson, Per Anders (2018) In Catalysts 8(11).
Abstract

Powder materials containing copper ions supported on ZSM-5 (Cu-Zeolite Socony Mobil-5) and SSZ-13 (Cu-Standard Oil synthesised zeolite-13), and predominantly CuO nanoparticles on amorphous SiO2 were synthesised, characterised, wash-coated onto ceramic monoliths and, for the first time, compared as catalysts for direct conversion of methane to methanol (DCMM) at ambient pressure (1 atm) using O2, N2 O and NO as oxidants. Methanol production was monitored and quantified using Fourier transform infrared spectroscopy. Methanol is formed over all monolith samples, though the formation is considerably higher for the copper-exchanged zeolites. Hence, copper ions are the main active sites for DCMM. The minor... (More)

Powder materials containing copper ions supported on ZSM-5 (Cu-Zeolite Socony Mobil-5) and SSZ-13 (Cu-Standard Oil synthesised zeolite-13), and predominantly CuO nanoparticles on amorphous SiO2 were synthesised, characterised, wash-coated onto ceramic monoliths and, for the first time, compared as catalysts for direct conversion of methane to methanol (DCMM) at ambient pressure (1 atm) using O2, N2 O and NO as oxidants. Methanol production was monitored and quantified using Fourier transform infrared spectroscopy. Methanol is formed over all monolith samples, though the formation is considerably higher for the copper-exchanged zeolites. Hence, copper ions are the main active sites for DCMM. The minor amount of methanol produced over the Cu/SiO2 sample, however, suggests that zeolites are not the sole substrate that can host those active copper sites but also silica. Further, we present the first ambient pressure in situ infrared spectroscopic measurements revealing the formation and consumption of surface methoxy species, which are considered to be key intermediates in the DCMM reaction.

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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Cu-SSZ-13, Cu-ZSM-5, Cu/SiO, DCMM, In situ infrared spectroscopy, Methane partial oxidation, Methoxy reaction intermediate species, Supported copper ions
in
Catalysts
volume
8
issue
11
article number
545
publisher
MDPI AG
external identifiers
  • scopus:85057257122
ISSN
2073-4344
DOI
10.3390/catal8110545
language
English
LU publication?
yes
id
59c46582-9c77-49c2-a9db-57f4087f4fc3
date added to LUP
2018-12-04 08:39:51
date last changed
2022-04-18 00:47:54
@article{59c46582-9c77-49c2-a9db-57f4087f4fc3,
  abstract     = {{<p>Powder materials containing copper ions supported on ZSM-5 (Cu-Zeolite Socony Mobil-5) and SSZ-13 (Cu-Standard Oil synthesised zeolite-13), and predominantly CuO nanoparticles on amorphous SiO<sub>2</sub> were synthesised, characterised, wash-coated onto ceramic monoliths and, for the first time, compared as catalysts for direct conversion of methane to methanol (DCMM) at ambient pressure (1 atm) using O<sub>2</sub>, N<sub>2</sub> O and NO as oxidants. Methanol production was monitored and quantified using Fourier transform infrared spectroscopy. Methanol is formed over all monolith samples, though the formation is considerably higher for the copper-exchanged zeolites. Hence, copper ions are the main active sites for DCMM. The minor amount of methanol produced over the Cu/SiO<sub>2</sub> sample, however, suggests that zeolites are not the sole substrate that can host those active copper sites but also silica. Further, we present the first ambient pressure in situ infrared spectroscopic measurements revealing the formation and consumption of surface methoxy species, which are considered to be key intermediates in the DCMM reaction.</p>}},
  author       = {{Wang, Xueting and Martin, Natalia M. and Nilsson, Johan and Carlson, Stefan and Gustafson, Johan and Skoglundh, Magnus and Carlsson, Per Anders}},
  issn         = {{2073-4344}},
  keywords     = {{Cu-SSZ-13; Cu-ZSM-5; Cu/SiO; DCMM; In situ infrared spectroscopy; Methane partial oxidation; Methoxy reaction intermediate species; Supported copper ions}},
  language     = {{eng}},
  month        = {{11}},
  number       = {{11}},
  publisher    = {{MDPI AG}},
  series       = {{Catalysts}},
  title        = {{Copper-modified zeolites and silica for conversion of methane to methanol}},
  url          = {{http://dx.doi.org/10.3390/catal8110545}},
  doi          = {{10.3390/catal8110545}},
  volume       = {{8}},
  year         = {{2018}},
}