Copper-Modified Zeolites and Silica for Conversion of Methane to Methanol
Journal article, 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.

methoxy reaction intermediate species

Cu-ZSM-5

DCMM

methane partial oxidation

in situ infrared spectroscopy

supported copper ions

Cu/SiO2

Cu-SSZ-13

Author

Xueting Wang

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Per-Anders Carlsson Group

Natalia Mihaela Martin

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Applied Surface Chemistry

Johan Nilsson

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Applied Surface Chemistry

Stefan Carlson

MAX IV Laboratory

Johan Gustafson

Lund University

Magnus Skoglundh

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry

Per-Anders Carlsson

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Per-Anders Carlsson Group

Catalysts

2073-4344 (ISSN)

Vol. 8 11 545-

Atomistic Design of Catalysts

Knut and Alice Wallenberg Foundation, 2016-01-07 -- 2021-06-30.

Time-resolved in situ methods for design of catalytic sites within sustainable chemistry

Swedish Research Council (VR), 2013-01-01 -- 2016-12-31.

Driving Forces

Sustainable development

Areas of Advance

Energy

Materials Science

Subject Categories

Materials Chemistry

DOI

10.3390/catal8110545

More information

Latest update

3/18/2019