Copper-modified zeolites and silica for conversion of methane to methanol
(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.
(Less)
- author
- Wang, Xueting ; Martin, Natalia M. LU ; Nilsson, Johan ; Carlson, Stefan LU ; Gustafson, Johan LU ; Skoglundh, Magnus and Carlsson, Per Anders
- organization
- publishing date
- 2018-11-15
- 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}}, }