Issue 20, 2018

Gas-phase synthesis of oxymethylene ethers over Si-rich zeolites


Oxymethylene ethers are a class of synthetic fuels that allows significantly reduced levels of pollutant emissions from compression-ignition engines. Conventionally they are synthesized in liquid-phase. As a new approach for the production of oxymethylene ethers the continuous gas-phase synthesis from methanol and formaldehyde was studied. A broad range of zeolites has been studied as the catalysts for the reaction and a relationship between reactivity and silica-to-alumina ratio was established. Moderate acidity as found in silicon-rich zeolites proved to be advantageous. Even aluminum-free zeolite shows high selectivity and activity to OME indicating that silanol groups as found on the external surface or in defects provide sufficient acidity for the reaction. The zeolitic catalysts deactivate with time but can be fully regenerated with common regeneration protocols.

Graphical abstract: Gas-phase synthesis of oxymethylene ethers over Si-rich zeolites

Supplementary files

Article information

Article type
17 Aug 2018
26 Sep 2018
First published
27 Sep 2018
This article is Open Access
Creative Commons BY license

Green Chem., 2018,20, 4719-4728

Gas-phase synthesis of oxymethylene ethers over Si-rich zeolites

A. Grünert, P. Losch, C. Ochoa-Hernández, W. Schmidt and F. Schüth, Green Chem., 2018, 20, 4719 DOI: 10.1039/C8GC02617C

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