Copper-Modified Zeolites and Silica for Conversion of Methane to Methanol
Artikel i vetenskaplig tidskrift, 2018

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, washcoated 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, N2O 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.

supported copper ions

Cu-SSZ-13

methane partial oxidation

methoxy reaction intermediate species

DCMM

Cu/SiO2

Cu-ZSM-5

in situ infrared spectroscopy

Författare

Xueting Wang

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Per-Anders Carlsson Group

Natalia Mihaela Martin

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Teknisk ytkemi

Johan Nilsson

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Teknisk ytkemi

Stefan Carlson

Max IV-laboratoriet

Johan Gustafson

Lunds universitet

Magnus Skoglundh

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Per-Anders Carlsson

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Per-Anders Carlsson Group

Catalysts

2073-4344 (ISSN)

Vol. 8 545-

Tidsupplösta in situ metoder för design av katalytiska säten för hållbar kemi

Vetenskapsrådet (VR), 2013-01-01 -- 2016-12-31.

Atomär design av katalysatorer

Knut och Alice Wallenbergs Stiftelse, 2016-01-07 -- 2021-06-30.

Drivkrafter

Hållbar utveckling

Styrkeområden

Energi

Materialvetenskap

Ämneskategorier

Materialkemi

DOI

10.3390/catal8110545

Mer information

Skapat

2018-11-15